Category Archives: Level Measurement Solutions

Material Level Indicators

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The material level indicator refers to an instrument for real-time detection of changes in the height of solid materials in a container. Material level indicator is also known as material level transmitter, material level controller, material level meter, etc.

Level measurement usually refers to the detection of the height of materials (solid or liquid level) in closed or open containers during industrial production. Instruments that accomplish this measurement task are called level gauges. Level measuring instruments are used to monitor liquid or solid material levels. Includes slurries and granular solids.

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Level Sensors
Material Level Indicators

Material Level Monitoring

Level measuring instruments are industrial automation instruments that measure the liquid level and loading height of liquid and powdery materials. Measure the stacking height or surface position of solid materials such as lumps, granules and powders.

Material Level Monitoring is the measurement of the surface position of solid blocks or powders in a silo to understand the amount of material stored in the silo.

for example:
In thermal power plants, it is necessary to detect the position of coal lumps and pulverized coal in the raw coal hopper and pulverized coal bunker.

Featured Material Level Indicators

The requirements for measuring the level of bulk materials are increasing. Reliable level sensors achieve the required measuring accuracy in all areas of the process chain. Depending on the position, the standard level gauge can be individually configured, making it suitable for various applications.

The measurement of fine powders in the chemical industry is as reliable as the measurement of sand and gravel or the measurement of plastic particles in the construction industry.

A variety of different bulk materials are commonly used in steel production. Material level information facilitates accurate material management and avoids conveyor congestion and feed hopper overflows. This prevents material loss, delays and additional costs.

In general, simple material level information obtained by optical distance sensors or ultrasonic sensors is sufficient.

Extended reading: GWR Solid Level Sensor-for Cement silo-Ash powder measure

The Rotary paddle bin level indicator is based on the principle of rotating machinery. The motor-driven paddles rotate continuously at a standard rotation speed of one revolution per minute.

The increasing bulk material in the silo or container buries the paddles. This blocks the rotation and generates a counter-torque.

This reactive torque turns the built-in rotatable motor out of its original position and signals the switch via the switch arm to open the switch.

The second switch delays cutting power to the motor.

If the level drops again, the paddles are exposed, and the spring will spring the motor back to its original position.

At this time, the motor is powered on and then sends out an output signal. The paddles begin to spin continuously again.

Extended reading: Radar Level Sensor Working Principle

The drying process usually consists of four stages: filling, drying, cooling and draining.

In order to realize media visualization and process automation. The material level of the silos storing wet bulk materials, storage vessels, static layer dryers and circulating dryers must be continuously controlled and monitored.

In storage containers, static layer dryers and circulating dryers. The level switch is used as a full warehouse alarm.

When the material reaches the preset level, the conveying device is automatically closed.

In the wet material or dry material storage container, the opposite is true. The level switch can be used as an empty warehouse alarm and a full warehouse alarm.

In particular, the empty silo alarm requires a sturdy structure of the paddle and is equipped with a protective tube. This can prevent the empty silo material level alarm from being damaged when the silo material falls.

The conveyor for filling the drying containers is powered on via the empty bin alarm. The empty bin alarm also controls the operation of the dryer. The full warehouse alarm will cut off the power supply of the conveying device when the material reaches the allowable level.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

The cement silo material level indicator is mainly used for automatic detection and control of the limit material level of various materials (such as powder, granule or block). Different types of material level indicators can meet the requirements of different working conditions. In metallurgy, Grain, flour, building materials, cement, electric power, coal, chemical industry, foundry, rubber, environmental protection dust removal and other industries have a wide range of applications in the process of material transportation and control.

Extended reading: Float Level Sensors – Single and Multipoint

Cement Silo Level Measurement

Cement silo seems to be a simple supporting equipment for concrete mixing plant. In fact, it also contains many auxiliary devices. It is not just a simple silo. It also includes auxiliary devices such as dust collector, arch breaking device, pressure safety valve, Level meter, etc.

The material level meter is mainly used for automatic detection and control of the limit material level of various materials such as cement and fly ash. It is indispensable. What does it do?

The material level meter is a sensor used to sense the height change of the material in the container. It can continuously detect the height, volume and other values ​​of the material in real time and convey relevant information to the computer or display instrument.

In the concrete mixing plant, the cement silo is a closed material storage device. The user cannot intuitively understand the amount of powder in it. At this time, a material level meter is needed.

Simply put, the material level meter in the cement silo can accurately record the position of the material in the cement silo, which is convenient for management.

After understanding the function of the level meter, what are the characteristics of the level meter?

  1. Anti-interference, ready to use:

Because there are no complicated electronic components and their amplifying circuit parts inside. Therefore, the level gauge is not subject to any electromagnetic wave interference. After installation, it can be used for a long time without any debugging and maintenance.

  1. Super anti-shake performance design:

There are no false signals even when the material is flowing.

  1. Shock resistance and anti-loosening structure design. Effectively avoid loosening and slipping of parts. High-quality stainless steel material is used to make it have excellent corrosion resistance and wear resistance.
  2. The material level meter adopts contact measurement. The result is real, accurate and reliable. It can be installed horizontally, inclined and vertically. It is easy to install and use.
  3. Material level display function:

Adopt long-life high-brightness indicator light. The material level display is intuitive and convenient.

  1. Excellent measurement reproducibility and adaptability to environmental conditions:

That is, it is not affected by changes in material particle size, shape, specific gravity, medium, wall scale, adhesion, temperature, humidity, dust concentration, etc.

  1. Double protection function:

The overload protection function prevents the blades from being damaged by excessive external force. The automatic protection function enables the material level device to be powered off when the rotation of the material blades is blocked in the silo, which protects the motor and effectively prolongs its service life.

Extended Reading: Silo/Bin material level measurement system

The Difference Between Material Level Indicator and Level Switch

First of all, the concept of Material Level Indicator and Level Switch is different.

Broadly speaking, Material Level Indicator is divided into two types: switch type and continuous type. It means that Material Level Indicator includes level switch.

In a narrow sense, the Material Level Indicator can detect the material level change in the container in real time, and can achieve continuous measurement. The material level switch only has the function of switching value, which can only monitor and control the point position, and cannot achieve continuous measurement.

Of course, in general, the instruments for continuous measurement use the naming method of Material Level Indicator. Most of the instruments for switching values use the naming method for level switches.

Secondly, the products covered by Level Switch and Material Level Indicator are different.

Divide from a narrow concept.

The material level switch mainly includes vibrating rod material level switch, resistance rotary material level switch, tuning fork material level switch, radio frequency admittance material level switch, etc.

Material Level Indicator mainly includes Ultrasonic Material Level Indicator, Radar Material Level Indicator, Ray Level Indicator, etc.

Frequently
Asked
Questions

Help Center

There are many different types of level indicators, each with its own application.

Use level indicators to detect and measure the level of liquids in tanks. Standard technologies used to measure liquid level include floats, pressure or depth sensors, ultrasonic detection and conductivity level measurement, and radar measurement.

Some other reference level indicators are tubular level indicators, float and plate level indicators, sight flow indicators, window sight flow indicators, pressure gauges and bi-color indicators. Some level indicators have multiple functions. Examples include built-in controllers, continuous output measurements and adjustable alarm switches.

Different types of liquid level indicators have different working principles. For example, we simply say radar level gauge.

Radar level gauge is a measuring instrument based on the principle of time travel. Radar waves travel at the speed of light, and the run time can be converted into a level signal by electronic components. The probe emits high frequency pulses that travel along the cable probe. When the pulse hits the material surface, it is reflected back and received by the receiver inside the meter. And convert the distance signal into a level signal.

Extended reading: Hydrostatic Level Measurement

Point level control should refer to a way of liquid level control circuit. By setting a control point to control the main working electrical (water pump or electric valve, etc.) to start (open) or stop (close) at this liquid level control point.

Extended reading: RF Admittance Level Sensor

Related Blogs

Sino-Inst offers over 20 Material Level Indicators for level measurement. For detecting high, intermediate, or low levels of liquids, powders and free flowing granular solids stored in tanks, bins, silos or other containers. About 50% of these are Radar level meters, 40% is other tank level sensor.

A wide variety of Material Level Indicators options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Material Level Indicators instrumentation, located in China.

Request a Quote

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The Secret of Water Level Control

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Water level control refers to the control of high and low water levels by mechanical or electronic methods. It can control solenoid valves, water pumps, etc. to become an automatic water level controller or water level alarm, thereby realizing semi-automation or full automation.

Water level control is generally used for high-level tank water supply and sump drainage. The device that converts the water level signal into an electrical signal to control the start and stop of the water pump is called a water (liquid) level controller. Commonly used water (liquid) level controllers include reed switch water level controllers, float magnetic switch liquid level controllers, electrode type water level controllers, pressure type water level controllers, etc.

RFQ More Level Sensors

Types of water level controllers

  • Floating ball controller
  • Reed water level controller
  • Cable water level controller
  • Electronic water level controller
  • Capacitive water level controller
  • Tuning fork water level controller
  • Electrode water level controller
  • Photoelectric water level controller

Water has buoyancy, and the float level controller is manufactured according to the buoyancy of the liquid. When the liquid level rises, the float system also rises accordingly. When the liquid level decreases, it also decreases accordingly.

When ascending or descending to the set position, the float system will hit the controller at the set position. This will cause the controller to issue an electrical signal.

The electronic control equipment will act immediately when it receives an electrical signal, cut off or connect the power supply, and constitute an automatic control system.

Extended reading: Float Level Sensors – Single and Multipoint

Reed water level controller is suitable for automatic control or alarm of water level in water towers, water tanks, pools, etc. in industrial and mining enterprises, civil buildings, and scientific and technological research fields. At the same time, it can also be widely used in the “three wastes” disposal facilities for environmental protection.

Extended Reading: 3 inch (3″) Water Flow Meter

There are one or several buoys on the cable water level controller that move with the water level. A permanent magnetic ring is fixed in the buoy. When the buoy moves to the upper or lower water level, the corresponding reed switch will accept the magnetic signal and act to send out the water level electrical signal. . Used to alarm or start the pump to work.

Extended reading: Hydrostatic Level Measurement

The electronic water level controller detects the water level through the built-in electronic probe. Then the chip processes the detected signal. When it is judged that there is water, the chip outputs a high level of 24V or 5V, etc. When it is judged that there is no water, the chip outputs 0V .

The concave-convex level signal is read by PLC or other control circuit boards, and drives the electrical appliances such as water pumps.

It can be installed in any direction. When installed horizontally, it will act when the water level reaches the blue line, and the precision is high. When installed vertically, it will act when the water level reaches the red line, which has a certain anti-wave function.

Extended Reading: Wireless Water Meter

The capacitive water level controller changes according to the small capacitance difference caused by the detection of the water level change. It uses a special ADA capacitance detection chip for signal processing. It can output a variety of signal communication protocols.

Capacitive water level detection can detect the change of water level or liquid in the container through any medium. It avoids the disadvantages of poor stability and reliability of traditional water level detection methods.

The tuning fork on the tuning fork water level controller is excited by the crystal to generate vibration. When the tuning fork is immersed in liquid, the vibration frequency will change. This frequency change is detected by the electronic circuit and outputs a controller quantity.

Extended reading: Magnetic water meter-ultrasonic water meter-mechanical water meter

The electrode type water level controller is an integrated measurement system composed of a primary electrode type sensor and a secondary controller. The water level controller is installed on the top of the container or on the wall of the container, and the electrode is inserted into the liquid.

During measurement, there is an AC signal voltage on the electrodes. When the liquid level rises and touches the electrodes, there is a communication signal current flowing between the electrodes, and then a liquid level signal is generated. After the control board receives the liquid level signal, rectification, filtering, Expansion and other processing. Finally, it is converted into a relay closed contact output or a standard current 16mA output for users to use.

When the liquid level drops and leaves the electrodes, there is no communication signal current flowing between the electrodes. The control board cannot receive the liquid level signal, and the relay returns to the release state or the standard current returns to 8mA.

Therefore, the liquid level can be accurately measured through the contact or non-contact of the liquid and the electrode, the pull-in or non-attraction of the relay or the magnitude of the current.

Read more about: Applications Of Submersible Level Transmitter

The photoelectric water level controller uses infrared detection. It uses the principle of refraction and reflection of light. The light will reflect or refract at the interface of two different media.

When the measured liquid is at a high level, the measured liquid and the photoelectric controller form a kind of interface. When the measured liquid is at a low level, the air and the photoelectric controller constitute another interface. These two interfaces will make the photoelectric control The reflected light intensity received by the light-receiving crystal inside the device is different. That is, it corresponds to two different controller conditions.

Extended Reading: Procurement Guide for Ultrasonic liquid level sensors

Featured Water level Control and Sensors

SI-PCM260 Deep Well Water Level Sensor
SI-PCM261 Submersible Pressure Transducer
SI-151 Hydrostatic Level Sensor
SIRD-908 Radar Water Level Sensor
SI-U03 Float Switch Water Level Controller
SI-U01 Float Level Sensor
ULT-100A Ultrasonic Level Transducer
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
SIRD-701 Guided Wave Radar Level Sensor
Magnetic Level Gauge/Indicator
Differential pressure(DP) level transmitter
SI-U02 Multi-Point Liquid Level Float Switch

Frequently
Asked
Questions

Help Center

A water level controller is a device that manages water levels on a variety of systems such as water tanks, pumps and swimming pools. The basic function of a water level controller is to regulate water flow and optimize system performance.

Extended reading: Radar Water Level Sensor Applied To River/Reservoir Monitoring

The water level controller is an instrument that can help users solve the waste of water resources. It can efficiently and timely solve the water cutoff and overflow conditions. More importantly, it can solve the problem of artificial water level control for users and realize automatic water level control.

The main functions of the water level controller are as follows:

  1. The display mode of the instrument: it has the functions of -1999~9999 measured value display and set value display, and can also display the working status of the light-emitting diode;
  2. Control mode: 1-4 limit control can be selected, LED indication. The control method is relay ON/OFF; with hysteresis (can be freely set by the user), the control accuracy is ±1 word, and the contact capacity: AC220V/3A, DC24V/6A resistive load.
  3. With alarm function: 1-4 limit alarm can be selected, LED indication. The alarm mode is relay ON/OFF; with hysteresis (user can freely set) alarm accuracy ±1 word, contact capacity: AC220V/3A, DC24V/6A resistive load.
  4. It can monitor the change of water level, according to the set upper and lower limit values ​​of water level and water level alarm value, it can automatically control the opening and closing of the water pump, and can output external alarm signals, which is convenient for users to take timely measures to deal with it.
  5. The instrument consists of three parts: sensor, transmitter and receiver. One transmitter can be configured with multiple receivers, and several receivers monitor the water level of the same water tower and pool at different locations. Provide users with more accurate water level information.

The water level controller has the characteristics of compact structure, economy, reliability, practicality, energy saving and consumption reduction. It is a new type of automatic control device worthy of promotion.

Extended reading: Float Switch Water Level Controller

The function of the liquid level sensor is to detect the liquid level. The liquid level sensor is widely used in electrical appliances and industrial equipment that require water level control. The liquid level sensor can realize the function of water shortage protection.

Principle of water level sensor:
The water level sensor has a sensor. Transform the sensed water level signal into a current signal.

There are many types of water level sensors, so their specific measurement principles are different.
If you need to learn more. You can refer to:
Differential pressure type liquid level measuring instrument;
Float level measuring instrument;
Electric liquid level measuring instrument;
Ultrasonic liquid level measuring instrument;
Radar liquid level measuring instruments, etc.

Extended reading: Capacitive water level sensor

Related Blogs

Sino-Inst offers over 20 Water Tank Level Sensors for Water Level Control.

About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of Water Tank Level Sensors options are available to you, such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

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A New Choice for Boiler Drum Level Measurement – Guided Wave Radar

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Boiler Drum Level Measurement is very important and necessary in major factories. Drum level is an extremely important control parameter. It is an important guarantee for the production of high-quality steam. It is also directly related to the safe operation of the steam drum.

Excessive liquid level will cause the steam-water separation of the steam drum. Increase the moisture carried by the steam. Deteriorating steam quality. It can cause water to enter the turbine, and even damage its blades in severe cases. If the liquid level is too low, there is less water in the drum. Water vaporizes faster. Causes the downpipe to carry steam. Cause the steam drum to burst or explode.

Therefore, it is important to choose a suitable and safe liquid level sensor to measure Boiler Drum Level.

RFQ More Level Sensor

Why is Boiler Drum Level Measurement important?

In the boiler evaporation equipment, the boiler drum is an important part. The natural circulation loop of the boiler is composed of it, the upper header, the lower header, the lead-out pipe, the descending pipe and the water cooling wall. How the boiler drum level is controlled will affect the following aspects.

When the liquid level of the boiler drum is too high. The space where the steam is located is reduced. This results in increased water carryover in the steam. Causes the steam quality to deteriorate. This is one of them. Second, the water level is too high, and the superheater pipe is easy to accumulate salt scale. The tube is overheated and damaged.

The above two situations will occur when the water level is too high. What happens when the steam drum is full of water?

When the steam drum is full of water, there will be a lot of water in the steam. Severe hydraulic shock to steam lines.

The boiler drum water level is too high or too full. So is it too low?
The answer is of course no.

When the water level in the drum is too low, the water circulation will be disrupted. The water wall will exceed the usual temperature and overheat. If the water level is low to a certain extent, there is a serious water shortage. The device is likely to be severely damaged. even lead to accidents.

From the above content, it can be seen that the high and low water level of the boiler drum will have a certain impact on the safe operation of the boiler. In severe cases, it may even affect the safe operation of the unit. Therefore, it is very important to control the liquid level of the boiler drum. The use of liquid level gauges for liquid level measurement is also an inevitable result.

Liquid level data, seemingly unimportant, is actually very important. So no matter what industry, you must understand your own working conditions when choosing a liquid level sensor. Select the liquid level sensor according to the working conditions, so as to choose the appropriate one.

Extended reading: Hydrostatic Level Measurement

Current Situation of Drum Level Measurement

At present, from the basic principle of drum level measurement. The widely used are mainly based on two principles of connecting pipe type (static pressure) and differential pressure type. Drum level measurement instruments mainly include differential pressure level transmitters, Displacer Level Transmitters and guided wave radar level sensors.

The measurement principle of Differential pressure level transmitters is to measure the liquid level by converting the change of liquid level height into the change of differential pressure. This conversion is achieved by balancing the vessel to form a reference water column. The key to its accurate liquid level measurement is the accurate conversion between liquid level and differential pressure.

Using a differential pressure transmitter to measure boiler drum level must take into account certain physical properties of the fluid. The steam drum contains a two-phase mixture of water and steam under saturated conditions. The density of water and steam varies with saturation temperature or pressure. The density of saturated steam on the water surface, as well as the density of saturated water in the drum, must be considered.

Maybe you can refer to: Rosemount-Boiler Drum Level Transmitter Calibration

More about: Use Differential Pressure Transmitter to Measure Liquid Level

The Displacer Level Transmitter works based on the principle of buoyancy.

When the liquid level is at 0, the torsional moment generated by the torsion tube by the gravity of the float is the largest. The rotation angle of the torsion tube is at 0°.

When the liquid level gradually rises to the highest level, the torsion tube is subjected to buoyancy to generate a torque torque and rotates through an angle. The transmitter converts the angle into a 4~20mA DC signal. The signal is proportional to the measured liquid level.

The density change of the medium in this measurement method will affect the measurement accuracy. Mechanical vibration will also cause inaccurate readings.

The electrical contact level sensors belong to the connected tube type level sensors. The principle is to measure the liquid level by using the characteristics that the electrode in the boiler water has a small impedance to the cylinder and the electrode in the steam has a large impedance to the cylinder.

The conductivity of boiler water in high-pressure boilers is generally tens of thousands to hundreds of thousands of times greater than that of saturated steam. Therefore, the indication value of the electric contact level gauge is less affected by changes in the pressure of the steam drum. It can easily transmit liquid level signals remotely. .

However, the reliability of the sampling sensor is poor, the mechanical seal of the motor is easy to leak, the service life of the electrode is short, the indication is discontinuous, and there is a certain amount of maintenance.

Extended Reading: FMCW Radar for High Temperature Level Sensor

To sum up, due to the complexity of the measurement object of the liquid level in the drum, the uncertain factors in the actual operation and the large measurement error, the measurement of the liquid level sensor in the drum often has a large deviation.

Guided wave radar liquid level measurement is a brand-new measurement technology. It overcomes the shortcomings of liquid level measurement instruments such as differential pressure type, float type, and electrical contact. It is a brand-new liquid level measurement device.

Guided Wave Radar Level Transmitter

Guided wave radar level transmitter uses guided wave radar (GWR) technology. Based on the reflection of microwave on the surface medium. Through the probe, continuous level measurement of liquid and solid levels is completed.

A guided wave radar level transmitter is also called a wave-guided radar level sensor. They can measure both levels and the interface between two media. Through probe rod or cable, complete level contact types continuous level measurement. Such as Coaxial Probe Guided Wave Radar Level Transmitter. This is different from ultrasonic level measurement, which is non-contact measurement. A guided wave radar level transmitter is often used for tank level measurement. Including liquid and solid. Output 4～20mA/HART, so as to measure and control the level during production.

Guided Wave Radar Level Transmitter is a liquid level transmitter based on the principle of time domain reflectometry (TDR).

The electromagnetic pulse propagates along the steel cable or probe at the speed of light. When encountering the surface of the measured medium. Part of the pulse of the Guided Wave Radar Level Transmitter is reflected to form an echo and return to the pulse transmitter along the same path. The transmitter and the measured medium The distance from the surface is proportional to the travel time of the pulse in between. The liquid level height is calculated.

The advantages of the Guided wave radar level transmitter are contact measurement. Signal stability. Measurement unaffected by liquid density and electrical properties. Maintenance free, etc.

However, when the guided wave radar level gauge measures high temperature and high pressure liquids, the measured value will have a large deviation due to the polarization of the air. And the greater the distance between the measurement reference point (flange) and the surface of the measurement medium. The resulting The larger the systematic error.

1) The measurement is accurate.

Density and dielectric constant changes of the medium, as well as fog and foam, have no effect on the measurement. At the same time, the deposition and fouling of the medium on the wave guide have little effect on the liquid level measurement. This is because the signal transmission in the waveguide is not affected by liquid level fluctuations and obstacles in the tank, etc. The feedback signal received by the instrument is correspondingly stronger.

Furthermore, the detected interfering spurious signals in the return signal are extremely small. It is only necessary to detect the transit time of the electromagnetic wave. No signal processing and discrimination is required. Therefore, the measurement of the drum level is accurate.

2) It is convenient to measure and adjust.

Because electromagnetic waves are constant. When programming configuration, only need to input relevant parameters such as measuring range on site. No migration is required to change meter ranges and field calibrations. Greatly improve the efficiency of adjusting the instrument.

More about Advantages of Coaxial Probes

3) Low installation cost and easy maintenance.

Guided wave radar level transmitter consumes less energy. The two-wire transmission method greatly saves the installation cost.

At the same time, the quick universal joint between the probe and the transmitter makes the installation easier. It is more conducive to future maintenance.

Extended reading: Float Level Sensors – Single and Multipoint

Read more about: Condensate Flow Meter-Steam Condensate Flow Meter|Types & Selection Guide

Guided wave radar level transmitter measures drum level

A new type of Guided wave radar level transmitter is used to measure the liquid level of the steam drum of a certain device. The level gauge is certified as a limiting device for high temperature water (HW) and low temperature water (LW) containers. Complies with EN12952-11 and EN12953-9 (TUV certified) standards.

Guided wave radar level transmitter with GPC function technology. Improve the accuracy and reliability of the Guided wave radar level transmitter in high temperature and high pressure environment.

GPC technology

Under high temperature and high pressure conditions, the propagation speed of electromagnetic wave signals in the vapor above the medium (polarized medium) will decrease. At this time, the liquid level value measured by the radar will decrease.

Use guided wave radar with gas phase automatic compensation. Guided wave radar produces a reference reflection within the distance from the flange (measurement reference point), which varies along the rod probe.

Under normal temperature and pressure. The electromagnetic wave has two reflected echoes at the compensation reference end and the liquid level reflecting surface. The measurement is accurate at this time. At this time, the reference distance (the distance from the measurement reference point to the reference rod) is calibrated.

At high pressure, due to the polarization effect of the gas. At this time, the measured distance (the distance from the measurement reference point to the liquid level) has a large deviation from the actual value of the liquid level. if not compensated. Then there will be a large error in the measurement value.

The measured value is compensated by converting the reference reflection.

The calculation formula is: compensation distance = reference distance × (measured distance/measured distance). An accurate actual liquid level value can be obtained.

Application

The steam drum of the boiler plant is the main part of the steam production system.

Use the high temperature heat in the flue gas section of the reformer and the high temperature waste heat of the reformer gas at the furnace outlet. Produce 10.5MPa high pressure steam.

Part of it participates in the reaction as the steam distribution in the process. The other part is sent to the high-pressure steam pipe network to realize the comprehensive utilization of thermal energy and improve the operation efficiency of the device.

Because the traditional measurement can not meet the measurement requirements well. It is necessary to choose other products to replace.

Due to the importance of the steam drum to the boiler plant. To measure the liquid level of the steam drum, three measuring instruments are designed and used: Guided wave radar level transmitter and differential pressure liquid level level transmitter.

Measured by example. At high temperature, the measurement error of ordinary guided wave radar (without GPC) is as high as 18%. With GPC, the measurement error is only 2%.

The measurement data of the GPC guided wave radar level gauge at high temperature is relatively stable and true.

Therefore, it is a perfect combination of guided wave radar technology with GPC and advanced signal processing technology. This makes the guided wave radar level gauge with GPC an ideal solution for level measurement in steam and turbulent boiling conditions.

Extended reading: Vortex Steam Flow Meter

Featured Guided Wave Radar Level Transmitters

SIRD-701 Guided Wave Radar Level Sensor
SIRD-702 GWR Corrosive Liquid Chemical Level Sensor
SIRD-703 GWR Bulk Solids & Powder Solid Level Sensor
SIRD-704 Coaxial Probe Guided Wave Radar Level Transmitter
SIRD-705 GWR Level Sensor for High Temperature & High Pressure

Related Level Measurement Blogs

Sino-Inst offers over 10 GWR Corrosive Liquid Chemical Level Sensors for level measurement. About 50% of these are Guided Radar level meters, 40% is the tank level sensor.

A wide variety of GWR Corrosive Liquid Chemical Level Sensors options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Guided Wave radar level measurement instrumentation, located in China.

Request a Quote

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Tech Guide for Non-Contact Radar Type Level Transmitters

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What Is Radar Type Level Transmitter?

The Radar Type Level Transmitter is a kind of instrument that measures the liquid level in the container by microwave. The Radar Type Level Transmitter provides reliable non-contact, maintenance-free continuous measurement of liquids in metal tanks or containers. Not affected by pressure, vacuum or temperature.

Excellent performance under harsh measurement conditions such as flammable, explosive, highly corrosive, high temperature, and viscous. Ideal for corrosive liquids, viscous liquids, slurries, or other applications where direct contact with the medium is not desired. Especially suitable for the measurement of large vertical tanks and spherical tanks. Low dielectric properties allow operation in liquids with a dielectric constant of 2 or greater. It can be used in almost every occasion.

RFQ Level Sensors

Features of Radar Type Level Transmitters

  1. Radar Type Level Transmitter can measure liquid and solid media. For example: crude oil, slurry, raw coal, pulverized coal, volatile liquids, etc.;
  2. Can be measured in vacuum can measure all media with a dielectric constant> 1.2. Measuring range up to 150m;
  3. The power supply and output signal pass a two-core cable (loop circuit), using 4…20mA output or digital signal output;
  4. Non-contact measurement and installation are convenient and extremely stable materials are used. It is accurate and reliable with a resolution of up to 1mm;
  5. Not affected by noise, steam, dust, vacuum and other working conditions;
  6. Not subject to changes in medium density and temperature. Process pressure can reach 400bar, medium temperature can reach -200℃ to 800℃;
  7. There are various installation methods to choose from: Top installation. Side installation. Bypass pipe installation. And waveguide installation;
  8. Debugging can be selected in many ways: Using programming module debugging , equal to an analytical processing instrument. SOFT software debugging. HART handheld programmer debugging. Debugging is convenient and fast.

Advantages of radar level measurement

  • Measurement is not affected by temperature, pressure or dust
  • User-friendly adjustment saves time
  • Non-contact, continuous level measurement over larger ranges
  • Unaffected by sludge and biomass, dust, foam, oil, grease and other coatings, uneven surfaces, turbulence, pressure, and vacuum
  • Single frequency radar level sensors for liquid sensing, dual frequency radar level sensors for level measurement of aggregates, gravel, sand, coal, asphalt, and other solids
  • Simple mounting and push-button calibration

Radar Level Transmitters Specifications

– 120GHz

Series
SI-FMF11
SI-FMF12
SI-FMF13
SI-FMF15
SI-FMF21
Applicable medium:LiquidLiquid Liquid Liquid Solid
Measuring range:0.05m~30m0.05m~35m0.1m~100m0.1m~35m0.3m~150m
Antenna:32mm lens antenna42mm lens antenna78mm lens antenna78mm lens antenna78mm lens antenna + purging (or without purging)
Accuracy:±2mm±2mm±2mm (range below 35m)
±5mm (range between 35m-100m)		±2mm±5mm
Medium temperature:-40～80℃-40～110℃-40～110℃-40～200℃-40～110℃
Medium pressure:-0.1～0.3 MPa-0.1～1.6MPa-0.1～0.3MPa-0.1～2.5MPa-0.1～0.3MPa
Signal output:Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus
Power supply:Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V
Shell:Aluminum/plastic/stainless steelAluminum/plastic/stainless steelAluminum/plastic/stainless steelAluminum /Plastic /Stainless steelAluminum/plastic/stainless steel
Process connection:G1½A / 1½NPT thread / flange ≥DN50G2A thread/flange≥DN65Flange ≥DN80Flange ≥DN80Flange ≥DN80

– 80 GHz

SeriesLM78x0LM78x1LM78x2
Applicable medium:For normal solid applicationFor liquid applicationFor large range solid application
Measuring range:0.3 m ~ 60m0.08m~30m0.6m ~ 120m
Antenna:Lens antenna/
anti-corrosive antenna /
flange isolated by quartz		 Lens antenna/
anti-corrosive antenna /
flange isolated by quartz 		Lens antenna/
anti-corrosive antenna /
flange isolated by quartz
Accuracy:±1mm±1mm±1mm
Medium temperature:T0:-40~85℃;
T1:-40~200℃;
T2:-40~500℃;
T3:-40~1000℃		 T0:-40~85℃;
T1:-40~200℃;
T2:-40~500℃;
T3:-40~1000℃ 		T0:-40~85℃;
T1:-40~200℃;
T2:-40~500℃;
T3:-40~1000℃
Medium pressure:-0.1~2MPa-0.1~2MPa-0.1~2MPa
Signal output:4 ~ 20mA or RS-4854 ~ 20mA or RS-4854 ~ 20mA or RS-485
Power supply:15~28VDC15~28VDC15~28VDC
Shell:Aluminum alloy, stainless steelAluminum alloy, stainless steelAluminum alloy, stainless steel
Process connection:Thread or flangeThread or flangeThread or flange

– 26 GHz

SeriesSIRD-901 SIRD-902 SIRD-902T SIRD-903 SIRD-904 SIRD-905 SIRD-906 SIRD-908 SIRD-909
Applicable medium:All kinds of corrosive liquidSlightly corrosive liquidCorrosive liquids, vapors, volatile liquidsSolid material, Strong dust
easy to crystallize, condensation occasion		Solid material, Strong dust,
easy to crystallize, condensation occasion		Solid particles, PowderHygienic liquid storage,
Corrosive container		Rivers, Lakes, ShoalRivers, Lakes, Shoal
Measuring range:
10 meters		30 meters20 meters70 meters80 meters30 meters20 meters30 meters70 meters
Antenna:Sealing horn / PTEEHorn Antenna Φ46mm/ Horn Antenna Φ76mm /Horn Antenna Φ96mm / Special CustomInternal tapered rod antenna PVDF / 78mm
Internal tapered rod antenna PFA / 78mm		Horn Antenna Φ76mm / Φ96mm / Φ121mm/Special CustomParabolic antenna Φ196mm /Φ242mmHorn Antenna Φ76mm / Φ96mm / Φ121mm/Special CustomViton / (-40~130) ℃Horn antenna with 76mm/ 96mmHorn antenna with 76mm/ 96mm/ special custom
Accuracy:± 5mm± 3mm±3mm±15mm±15mm±15mm± 3mm± 3mm± 10mm
Medium temperature:-40℃~130℃-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃ ~ 130℃-40℃ ~ 100℃40℃ ~ 100℃
Medium pressure:-0.1~0.3 MPa-0.1 ~ 4.0 MPa-0.1~2.0 MPa-0.1~4.0 MPa (Flat flange)
-0.1~0.3MPa (Universal flange)		-0.1 ~ 0.3 MPa-0.1 ~ 4.0 MPa (Flat flange)
-0.1 ~ 0.3 MPa (Universal Flange)		-0.1~4.0 MPaNormal-pressure Normal-pressure
Signal output:4… 20mA /HART （2-wire / 4-wire）
RS485/ Modbus		4… 20mA /HART（2-wire / 4-wire）
RS485/ Modbus		4… 20mA /HART（2-wire / 4-wire）
RS485/ Modbus		4… 20mA /HART （2-wire / 4-wire）
RS485/ Modbus		4… 20mA / HART (2-wire / 4-wire )
RS485/ Modbus		4… 20mA /HART (2-wire / 4-wire )
RS485/ Modbus		4… 20mA/HART (2-wire / 4-wire )
RS485/ Modbus		RS485 / Modbus ( 6~24V DC)
4~20mA / Hart Two-wire ( 24V DC)		RS485 / Modbus ( 6~24V DC)
4~20mA / Hart Two wire ( 24V DC)
Power supply:2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V ）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）(6 – 24V) DC  / Four-wire
24V DC / Two wire		(6 – 24V) DC  / Four-wire
24V DC / Two wire
Shell:Aluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic /Single chamberAluminum / Plastic / Single chamber
Process connection:Thread, Flange Thread, Flange FlangeUniversal FlangeThread, Universal FlangeThread, FlangeFlange Thread G1½ A″ /Frame /Flange Thread G1½ A″ /Frame /Flange

– 6 GHz

Series
SIRD-801 		SIRD-802SIRD-803SIRD-804 SIRD-805 SIRD-806
Applicable medium:Liquid, slightly corrosive liquidLiquid, especially for corrosive liquidLiquid, especially with pressure and Volatile LiquidSolid particles or block material,
And it is not suitable for solid powder		Liquid, especially suitable for low dielectric constant, sticky, with mixing liquidSolid, especially suitable for high temperature conditions
Measuring range:20m20m35m35m20m15m
Antenna:The Rod Antenna ( PP/PTFE )The Rod Antenna (PTFE)The Horn AntennaThe Horn AntennaThe Horn AntennaThe Horn Antenna
Accuracy:±10mm± 10mm± 10mm± 20mm± 10mm± 20mm
Medium temperature:(-40 ~ 130) ℃-40℃~130℃（Standard type）
-40℃~180℃（High temperature type）		-40℃~130℃（Standard type）
-40℃~250℃（High temperature type）		-40℃~130℃（Standard type）
-40℃~250℃（High temperature type）		-40℃~130℃（Standard type）
-40℃~250℃（High temperature type）		(-40 ~ 400) ℃
Medium pressure:(-0.1 ~ 0.3) MPa(-0.1 ~ 1.6) MPa(-0.1 ~ 4) MPa(-0.1 ~ 0.3) MPa(-0.1 ~ 4) MPa(-0.1 ~ 0.3) MPa
Signal output:(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART
Power supply:Two-wire (DC24V)
Four-wire（DC24V / AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）
Shell: Aluminum /Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steel
Process connection:Flange (optional) / ThreadWith PTFE plate flangeFlange (optional) / ThreadUniversal joint flangeFlangeFlange

Industrial applications of Radar Type Level Transmitters

Radar level sensors have a very wide range of applications. Almost all media can be measured. This is something other types of meters can only look up to.

It can measure not only spherical tanks and horizontal tanks, but also the liquid level measurement of cylindrical tanks, cylindrical cone tanks, etc.

In terms of tank function, the liquid level in storage tanks, buffer tanks, microwave tubes, and bypass pipes can be measured.

As far as the measured medium is concerned, liquid, particle, slurry, etc. can be measured.

  1. Steel industry

Production processes:
Coal coking: coal preparation bunker, coke bunker, gas tank, coal tar and crude benzene tank
Sintering plant: sintered material mixing bin, cold return ore, pelletizing bin
Ironmaking plant: ironmaking intermediate warehouse, blast furnace material level, etc.

Working characteristics:
Solid material measurement, strong dust, low dielectric constant, long range.
Volatile crystallization of tar and crude benzene;
High temperature and dust adhesion of blast furnace material level;

Selection application:
Solid measurement is mainly based on high-frequency pulse radar level meter.
Guided wave radar level meter can be used for crude benzene and coal tar.

  1. Coal industry

Production link: raw coal bunker, pulverized coal bunker, coal gangue storage level, coal washing pool.
Working condition characteristics: typical solid material measurement, strong dust, low dielectric constant. Long range.
Selection and application: high-frequency pulse radar level meter is mainly used.

  1. Cement industry

Production link: raw material warehouse, raw material homogenization warehouse, clinker warehouse, finished product warehouse, fly ash warehouse, raw coal warehouse, gypsum warehouse, cement slag warehouse
Working condition characteristics: Typical solid material measurement, strong dust, low dielectric constant, long range.
Selection application: High-frequency pulse radar level meter is mainly used.

  1. Power industry thermal power, hydropower, biological power generation

Production processes:
(thermal power) raw coal and pulverized coal silo, circulating water pool, low and high water level, limestone powder silo, ash hopper material level, ash silo, slag silo, desulfurization tower liquid level

Working characteristics:
Solid material measurement, strong dust, low dielectric constant, long range.
Low water level, high temperature and high pressure;
Desulfurization tower liquid level foam, water vapor, crystallization, spray interference, side loading

Selection application:
The measurement of solid materials is mainly based on high-frequency pulse radar level meters.
High and low water level application of guided wave radar;
The low frequency radar level gauge is commonly used in the desulfurization tower liquid level;

  1. Non-ferrous metallurgy industry – aluminum, nickel, zinc, and titanium industries

Production processes:
(Aluminum production) slurry tank, dissolution tank, flash tank, post-dissolution tank, flocculation tank, settling tank, decomposition tank, alumina powder silo.

Working characteristics:
Various chemical reaction environments have high temperature, strong water vapor, stirring or corrosion factors

Selection application:
For the influence of high temperature water vapor, refer to factors such as corrosion, measuring range, stirring, and hanging material;
Choose between guided wave radar or low frequency radar level gauge.
High-frequency radar level gauges are still preferred for solids measurements.

  1. Water conservancy industry

Applications: Hydrological monitoring, flood control alarm, farmland irrigation

Characteristics of working conditions: The signal transmission is far away, the power supply voltage is low, and the installation position is affected by the embankment and dam. The radar wave with small beam angle is preferred.

Selection application: choose high-frequency radar level gauge with MODBUS protocol

  1. Food and pharmaceutical industry

Production processes:
Edible oil tank, soybean meal storage tank

Working characteristics:
Simple tank environment, or with precision requirements, antenna hygiene requirements in the pharmaceutical and food industries

Selection application:
The high-frequency radar level meter is preferred for the measurement environment with high precision;
If there are hygienic requirements, an antenna with a sealed material that meets hygienic conditions should be selected;

  1. Industrial petrochemical, coal chemical

Production processes:
Petrochemical: crude oil depot, gasoline tank, diesel tank, natural gas tank, etc.
Coal coke chemical industry: refer to the coal industry
Calcium carbide chemical industry: coal bunker, calcium carbide bunker, etc.

Working characteristics:
Solid material measurement, strong dust, low dielectric constant, long range.
The measurement environment of various oil depots is simple and may have accuracy requirements
There is pressure in the natural gas spherical tank, and the dielectric constant is small
There is oscillating interference echo in gas tank measurement
Various chemical reactor conditions are different

Selection application:
The measurement of solid materials is mainly based on high-frequency pulse radar level meters.
For various oil depots with precision requirements, high-frequency radar is preferred for spherical tanks;
Gas cabinets that are prone to oscillating interference signals also have limited selection of high-frequency radars;
The chemical reactor is selected according to the actual conditions and parameters;

  1. Environmental protection and water treatment industry

Processing link:
Water collecting well, coarse grid, fine grid, biochemical reaction pool, mud flushing pool, sludge pool, well dissolving medicine pool.

Working characteristics:
Except for ultra-long-range and narrow spaces such as water collection wells, other environments are relatively simple.

Selection application:
The water collecting well can choose guided wave radar or high-frequency radar level gauge according to the range requirements. Generally, ultrasonic level gauges are more commonly used in simple environments.

  1. Semiconductor industry

Production link: silicon micropowder warehouse
Working condition characteristics: very low dielectric constant, strong dust
Selection application: high frequency radar level meter

Radar Type Level Transmitters Applications

  • Liquids with foam, gases (CO2,methane) and other fumes
  • Highly corrosive liquids such as acids and solvents
  • High temperature applications up to 350F such as asphalt
  • Slurries
  • Acids, Caustics and Solvents
  • Vacuum applications
  • Diesel crude oil
  • Sanitary applications
  • Oil-water interface monitoring and detection

Extended reading: Hydrostatic Level Measurement

Ordering Information

When ordering Radar Type Level Transmitters, we need to consider the following factors:

  1. Application medium and measuring range:
    The physical properties of the liquid medium to be measured have a great influence on the measurement range. Liquids are usually divided into four categories: A, B, C, and D.

Class A: non-conductive liquid, the dielectric constant is less than 1.4, which has a great influence on the measurement distance, and the measurement range is
The circumference is small. such as propane.

Class B: non-conductive liquid, the dielectric constant is about 1.9~4, which has a great influence on the measurement distance.
The volume range is medium. Such as gasoline, oil, etc.

Class C: The dielectric constant is about 4~10, which has little influence on the measurement distance and has a large measurement range. like
Concentrated acid, organic solvent vinegar, ethanol, acetone, oil-water mixture, etc.

Class D: conductive liquid, dielectric constant > 10, little influence on the measurement distance, the most measuring range
big. Such as aqueous solution, diluted acid and alkali, etc. ·

When the liquid surface of the tank is smooth. The measurement range of Class A liquid is 5m. For Class B fluids
The volume measurement range is 10m. Class C liquid 15m. Class D liquids can reach 20m. When the liquid level fluctuates, the corresponding measurement range should be appropriately reduced.

  1. Process temperature and process pressure
    Radar Type Level Transmitters are suitable for high temperature and high pressure measurement. However, the temperature and pressure of the tank need to be clearly confirmed.
  2. Antenna style
    The radar level gauge consists of electronic components, waveguide connectors, mounting flanges and antennas.
    The shape of the antenna determines the thin focus and sensitivity. Therefore, the choice of antenna is particularly important.

3.1 Flare Antenna
The horn antenna is suitable for most occasions and has the advantages of good focusing, stable physical and chemical properties, durability and firmness. But it is not suitable for the measurement of corrosive media.

3.2 Rod Antenna
Rod antennas are chemically stable, easy to clean and insensitive to condensation. Suitable for corrosive media.

3.3 Under-the-flange antenna
The flange-mounted antenna is mainly used for the measurement of strong corrosive media.

3.4 Parabolic Antenna
The parabolic antenna has good focusing and is not affected by heating steam, and is especially suitable for in-tank measurement of large containers with heating steam, such as the measurement of residual oil, asphalt, etc., and the measurement range can reach 40m.

3.5 Antenna with stilling pipe or bypass pipe
Install a casing for the antenna. The casing is equivalent to a wire that transmits radar signals. It is suitable for occasions where the surface of the medium fluctuates greatly or the dielectric constant is small.

  1. Display and output signal requirements.
    Our Radar Type Level Transmitters are generally configured with local digital displays. A split display can also be configured if required by the customer.
    Support 4-20mA, 485 and other signal output.
  2. Installation method and installation size.
    Radar Type Level Transmitters support flanged, threaded, bracket mounts. When ordering Radar Type Level Transmitter, customers need to confirm the size with the manufacturer in advance.
  3. Special requirements.
    For example, anti-corrosion, explosion-proof, sanitary and so on.

Extended reading: How to convert a 4-20mA to 0-10V /1-5V signal?

Radar Level Measurement and guide wave radar level measurement Image source: https://instrumentationtools.com/radar-level-measurement/

Very short microwave pulses with very low energy are transmitted and received through the antenna system. The radar wave runs at the speed of light. The operating time can be converted into level signals by electronic components. A special time extension method can ensure stable and accurate measurement in a very short time.

Electromagnetic waves propagate in the air at the speed of light. The distance between the radar level gauge and the surface of the material can be expressed by the following formula: 　　

D = (1/2)*CT

In the formula:

D ———the distance between the radar level gauge and the surface of the material; 　　

C ———Speed of light 　　

T ———Pulse time.

Then the liquid level is: 　　L = E-D

In the formula:

L — liquid level; 　　

E ———The total height of the tank; 　　

D ———Air height.

Even in the presence of false reflections, the new micro-processing technology and the unique ECHOFOX- software can accurately analyze the level echo. By inputting the size of the container, the distance value can be converted into a signal proportional to the level. The instrument can be debugged with empty positions.

Radar Type Level Transmitters have the advantages of high precision, long life, low maintenance, high performance and so on. Widely used in the industry. Continuous measurement can be performed in harsh environments such as high temperature, high pressure, steam, vacuum and high dust. However, different models of Radar Type Level Transmitters are selected in different environments, and the antennas used are also different.

  1. Rod antenna

Insulated rod antennas are usually made of polymer materials such as polytetrafluoroethylene and polypropylene. Good corrosion resistance. Can be used in strong acid, alkali and other media.

However, the microwave emission angle is relatively large (about 30°), and there are many side lobes. For the case where the structure of the tank is more complicated. There will be more interference echoes. The signal-to-noise ratio is small and the precision is low.

But easy to clean. It is often used to measure tanks and corrosive media with good operating conditions, large diameters, and small measuring ranges.

If the measured medium is volatile and condensed, it is better to choose a rod antenna or a water drop antenna.

  1. Flare antenna

At the same frequency, the larger the diameter of the horn, the smaller the emission angle. If it is a high frequency radar level gauge, the emission angle is smaller and the accuracy is higher.

Most economical radar level gauges use microwave frequencies of 5.8GHz or 6.3GHz. Its emission angle is large, and it is easy to generate interference echoes on the container wall or internal components.

Although the horn antenna increases can reduce the emission angle. But the volume increases and the installation is inconvenient. And the improvement is limited.

Using high-frequency radar, the launch angle can reach 8°. This enables high measurement accuracy even when measuring the level of long and narrow tanks.

If it is used in a large-range measurement site, choose a radar level meter with a large horn antenna. Small horn antennas are suitable for small containers.

If the fluidity of the measured medium is poor and there is a phenomenon of hanging material, then choose a horn or a rod radar level gauge.

  1. Parabolic antenna

This is a new type of antenna that has been introduced recently, and is mostly used in radars that transmit at high frequencies. Because its emission angle is only 7°. Ideal for measuring precise targets and measuring around obstacles.

But its antenna size is large. If the X-band is used, the diameter is up to Φ454mm, and the opening size should be larger than 500mm, which is not very convenient for installation and use.

  1. Plane antenna

The planar antenna adopts planar array technology. That is, a multi-point emission source. Compared with a single-point emission source, it is measured on a plane. rather than a definite point.

With the corresponding electronic circuit, the measurement accuracy of the radar level gauge can reach ±1mm. It can be used for precision metering of storage tanks. Mainly used for metrology-grade radar level gauges. Planar antennas are suitable for a variety of working conditions.

Extended Reading: FMCW Radar for High Temperature Level Sensor

  1. Sleeve antenna

When the dielectric constant is small (1.6~3) or the liquid surface produces continuous eddy current or the device in the container causes false reflection, this type of instrument should be selected.

The casing has a focusing effect on the radar wave, and the antenna is installed in the still-pipe or bypass pipe.

The inner diameter of the casing has an effect on the propagation time of the radar wave. Therefore, when setting the parameters, the parameters of the inner diameter of the casing should be set. Compensation for in-travel time.

In addition, this type of antenna requires that the measured medium has good fluidity and is not easy to hang.

If the container under test has a stirring paddle. And the radius of rotation of the blade is almost equal to the diameter of the tank. Then the echo of the radar level gauge will be seriously disturbed. At this time, the still-pipe radar level gauge is used.

  1. Guided wave radar antenna

Sending and receiving electromagnetic waves through guided metal or cables is a contact measurement.

Because it has little effect on dust, steam, and the adhesion medium on the probe. Therefore, it is more widely used in solid material level and liquid level measurement with small dielectric constant.

The dual-cable guided wave radar level gauge uses the change of measuring capacitance to measure the level of the liquid level. The medium between the two electrodes is the liquid and the gas above it. Suitable for level measurement of corrosive and high pressure media.

Fundamentally solve the influence of temperature, humidity, pressure, material conductivity and other factors on the measurement process. Therefore, it has extremely high anti-interference and reliability.

Coaxial tube radar level gauge is a guided wave radar level gauge equipped with a coaxial tube probe. It is used for liquid level measurement and control of liquids with low dielectric constant or surface fluctuations. Such as If the dielectric constant of the measured material is too low, the general type of radar level meter is not suitable.

Extended Reading: Guided-wave radar (GWR) level transmitter working principle

Most of the time, people don’t think of using radar level sensors as level switches.
The output of radar liquid level sensor is mostly 4-20mA.
However, if the customer’s working conditions require output switching. It can also be customized.
For example, we can add a secondary gauge to the output of the radar level sensor. Convert the current signal into a digital signal.

Extended reading: Float Level Sensors – Single and Multipoint

Radar Type Level Transmitters can be used not only in various tanks. It can also be used in various storage tanks.

Extended Reading: Featured Silo Level Sensors

Different storage tanks have different types of Radar Type Level Transmitters.

A spherical tank, also known as a spherical container, has a spherical shell.
This kind of storage tank is mainly used for the storage and transportation of various gases, liquids and liquefied gases. It is widely used in chemical, metallurgy, petroleum and other industries.

Vaulted tank, also known as vaulted storage tank. It refers to the steel container with the top of the storage tank in the shape of a spherical tank and the tank body in the shape of a cylinder.
This type of storage tank is widely used in the fluid industry, such as the most common type C liquids. In addition, refineries also commonly use vaulted tanks to store diesel fuel, fuel oil, and more.

Floating roof tank, also known as floating roof storage tank. It is divided into inner floating roof tank and outer floating roof tank.

An internal floating roof tank is a floating roof tank with a tank top inside. Its top is a combination of a floating roof and a vault. The inside is a floating roof and the outside is a vault.

The floating roof of an external floating roof tank is a floating roof. It floats on the surface of the liquid storage and floats up and down as the liquid flows in and out. In refineries, these two types of storage tanks are often seen.

Horizontal storage tank. It is mainly composed of tank body, accessories and brackets. It is mainly used in the petrochemical industry for the storage of reaction media, crude oil, petroleum products, etc.

Vertical storage tank. It is mainly composed of foundation, tank bottom, tank wall, tank top and accessories. It is often used as a large oil tank for the petroleum industry. If it is divided by the structure of the tank top, vertical storage tanks can be divided into internal floating roof tanks, external floating roof tanks and vaulted roof tanks.

There are not many types of common measurement tanks for Radar Type Level Transmitters. However, different companies will install some auxiliary equipment inside according to the needs of the work, such as the most common heating coils, agitators, and so on. Therefore, when installing the radar level gauge, not only should pay attention to the shape and size of the storage tank, but also pay special attention to the internal structure.

Extended reading: Industrial Tank level indicators and Tank Level Gauges

More Featured Level Transmitters for Sale

SI-U01 Float Level Sensor
LR series Integral flange Magnetostrictive level sensor
LT series Digital Display Magnetostrictive liquid level sensor
SI-U02 Multi-Point Liquid Level Float Switch
ULT-200A Ultrasonic fuel tank level sensor
Portable Ultrasonic Liquid Level Indicator

HS-ULC-Pro Ultrasonic Non-contact Liquid Level Controller
HS-ULC Ultrasonic Level Switch-External Mounted
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
Differential pressure(DP) level transmitte
Remote Seal Differential Pressure Transmitter
SI-151 Hydrostatic Level Sensor

Read more about: Working Principle Of High Temperature And High Pressure Capacitive Level

Frequently
Asked
Questions

Help Center

We have two kinds of radar level transmitters:

  • Noninvasive or Non-contact Systems
  • Invasive or Contact System

Extended reading: Hydrostatic Level Measurement

The radar transmitter uses a high-frequency oscillator as a microwave generator. The generator produces microwave
shoot down through the antenna. When microwaves encounter obstacles, some of them are reflected back. According to the time difference between the transmitted wave and the reflected wave (ie microwave pulse travel). to calculate the distance to the material surface.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.

For more about: Types of Level Transmitters

Difference 1.
Different measuring ranges Ultrasonic liquid level measuring range: 0-50 meters;
The radar level gauge can measure all media with medium constant >1.2 in vacuum. The measuring range can reach 120 meters.

Difference 2.
The ultrasonic level gauge emits different substances by the sensor (transducer) to emit sound waves. After being reflected by the liquid surface, it is received by the same sensor or ultrasonic receiver.
The radar level gauge emits very short microwave pulses with very low energy, which are transmitted and received through the antenna system. The radar waves travel at the speed of light.

Difference 3.
Ultrasonic level gauges are widely used to measure the height of various liquid and solid materials.
Water and sewage treatment: pump room, water collection well, biochemical reaction tank, sedimentation tank, etc.;
Electric power, mining: mortar pool, coal slurry pool, water treatment, etc.
Radar level gauges can measure liquid and solid media.
For example: crude oil, slurry, raw coal, pulverized coal, volatile liquid, etc.

Read more about: Ultrasonic VS Radar level transmitter-different applications

Extended reading: Ultrasonic liquid level sensors

Extended Reading: Dielectric constant for radar level transmitter

About Non-Contacting Radar, Emerson also has a very comprehensive introduction. You can refer to this.

Sino-Inst offers over 10 Radar level transmitters for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of radar level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of radar level measurement instrumentation, located in China.

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Water Level Monitoring Sensor/System for Sewage-Wastewater

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Water Level Monitoring Sensors can be used to detect changes in water level. The Water Level Monitoring Sensor and other control equipment work together to form the Water Level Monitoring System. The Water Level Monitoring Sensor/System is used to monitor the discharge of industrial wastewater and urban sewage. This is the development direction of smart cities. Let’s talk about Water Level Monitoring Sensor/System for Sewage-Wastewater in detail below.

RFQ More Level Sensors

Level monitoring

By installing a drop-in liquid level monitoring box at the head of the sewage well. Real-time monitoring of liquid level data of sewage wells. The monitoring data is uploaded to the platform through wireless communication. The cloud platform recognizes anomalies based on data statistical algorithms.

When the liquid level exceeds the set alarm threshold, the system will send an over-limit alarm. Notify relevant personnel to start the pump to drain water. When the level detector has equipment failure. Record the fault alarm. Notify relevant personnel to inspect the equipment.

Extended reading: Float Level Sensors – Single and Multipoint

Surface Water Level Monitoring is suitable for the water department to monitor the surface water level. At the same time, it supports remote image monitoring. Provide accurate and timely on-site information to ensure proper water storage and safe flood season.
It is helpful for the Water Affairs Bureau to grasp the current situation of water resources in the region, the use of water resources, strengthen the recovery of water resources fees, and achieve the purpose of correct evaluation, reasonable dispatch, and effective control of water resources.

  1. Remote monitoring function. It can remotely monitor real-time data such as water level, rainfall, field equipment operating status, equipment voltage and so on.
  2. Remote control function. The opening/closing of the reservoir valve can be remotely controlled in the center according to the height of the on-site water level to maintain the normal water level.
  3. Image monitoring function. An external camera can be connected. Live photos can be taken. The photos can be uploaded to the monitoring center. The staff on duty can understand the situation on the spot without leaving home. Support regular and manual photos.
  4. Automatic alarm function. It will automatically alarm if the water level exceeds the limit, the rainfall exceeds the limit, the equipment fails, and the door is opened abnormally.
  5. Automatic statistics function. According to historical data, automatic statistics into daily reports, monthly reports, annual reports, etc.. Generate analysis charts according to customer needs.
  6. Data storage function. The monitoring center and the field terminal can store historical data bidirectionally. It can store not less than 10 years of historical data.

Scope of application:

  1. River water level monitoring. Real-time monitoring of the water level of the river provides a basis for decision-making.
  2. Lake water level monitoring. The required information can be extracted by uploading real-time water level conditions.
  3. Water level monitoring of the reservoir. Real-time monitoring of the water level in the reservoir is convenient for timely water replenishment and does not affect production and life.
  4. The upstream and downstream water level monitoring of the reservoir. The water level changes of the upper and lower water levels can be reflected through the water level gauges of various manufacturers.
  5. Rainfall monitoring in the reservoir area. Rain gauge measurement is used as the basis for rainfall and rainfall intensity in the reservoir area.
  6. On-site picture monitoring of the reservoir. Industrial cameras upload on-site pictures of the reservoir area.
  7. Monitoring of the infiltration line of the dam of the reservoir. Observe the position of the infiltration line of the dam body by embedding a piezometer.
  8. Monitoring the seepage pressure of the dam foundation of the reservoir. The seepage pressure distribution of the dam foundation is reflected by the embedded piezometer.
  9. Reservoir dam displacement monitoring. Accurately understand the horizontal and vertical deformation of the dam surface.

Extended reading: Radar Water Level Sensor Applied To River/Reservoir Monitoring

The river water level monitoring system is suitable for the water management department to remotely monitor the water level, rainfall, and other real-time data of the river basin. At the same time, it supports remote image monitoring. It provides accurate and timely on-site information to ensure proper water storage and safety in the river basin.

The river water level monitoring system achieves real-time monitoring of water and rain conditions and realizes the information management of the river. It has played a major role in protecting people’s lives and property safety.

System Overview

The river water level monitoring system is an important method for real-time control of river water regime changes, scientific early warning of flood disasters, improvement of flood control command capabilities, and reduction of rain and flood disaster losses.

System functions

  • Real-time monitoring of river water level, can expand rainfall, water quality, flow rate monitoring.
  • Support remote camera or video real-time monitoring (depending on the communication method).
  • When the water level exceeds the limit, the sensor fails, and the battery voltage of the monitoring terminal is low, the alarm will be immediately alarmed.
  • Automatically generate water level process curve and data statistics report.
  • It can be linked with the drainage pump station to automatically control the start and stop of the drainage pump group according to the water level of the river.
  • Supports docking with other comprehensive monitoring application platforms through OPC, database and other forms.

System Features

  • Strong compatibility: Compatible with various types of water level gauges such as ultrasonic, radar, float, laser, bubble, and drop-in type.
  • Flexible form of power supply: According to site conditions, it can be flexibly selected to supply power to the equipment by means of city electricity, solar energy, batteries, etc.
  • Various communication methods: support GPRS, CDMA, NB-IOT, short message, Beidou satellite, 3G/4G, WIFI, ADSL/optical fiber and other communication methods.

Extended Reading: GWR Level Sensor for High Temperature & High Pressure

The water level control switch is a feedback liquid level position signal. It informs the center console of the duty room whether the water level has reached the specified water level. It can also control the startup or shutdown of related equipment (such as water pumps). The signal voltage is often a safety voltage of 12V or 24V.

Water Level Control Sensor Switch is widely used in industrial boilers, civil construction pools, water towers, water tanks. As well as open or closed storage tanks in petrochemical, paper, food, sewage treatment, and other industries. Level measurement of various liquids in underground tanks. The tested medium can be divided into various conductive and non-conductive liquids such as water, oil, acid, alkali, industrial sewage, and so on. It forms a set of advanced liquid level display and control equipment with the electric valve, which automatically opens and closes the electric valve.

Extended reading: RF Admittance Level Sensor

Tank level sensor is a common sensor for measuring liquid level position. It converts the height of the position into an electrical signal for output. The liquid level sensor is a modular circuit. It has the advantages of acid resistance, moisture resistance, shock resistance, and corrosion resistance. The circuit contains a constant current feedback circuit and an internal protection circuit. The maximum output current can be made to not exceed 28mA. Therefore, the power supply can be reliably protected and the secondary meter is not damaged. In general, it is used in electrical appliances and equipment that require water level control.

Read more Tank Level Gauges & Indicators.

We can divide Water Level Sensors into two categories by measuring whether they are in contact with the water level.

One type is contact type. Including single flange static pressure/double flange differential pressure level transmitter, float type level transmitter, magnetic level transmitter, input type level transmitter, electric internal float level transmitter Sensors, electric float level transmitters, capacitive level transmitters, magnetostrictive level transmitters, service level transmitters, etc.

The second category is non-contact. Divided into the ultrasonic level transmitter, radar level transmitter, and so on.

Extended Reading: Chilled Water Flow Meter

Ultrasonic liquid level Sensor adopts an ultrasonic pulse-echo method to realize liquid level measurement. Specifically, the transducer (probe) of the ultrasonic liquid level Sensor sends out high-frequency ultrasonic pulses. When it encounters the surface of the liquid level to be measured, the sound wave is reflected back. Part of the reflected echo is received by the transducer (probe) and converted into an electrical signal. The user can know the water level almost in real-time based on the reflected signal.

When choosing a water level measuring instrument, it is recommended to measure the ultrasonic liquid level Sensor here. It adopts microprocessor program control technology and intelligent signal processing technology. The measurement is efficient and accurate.

Read more about: Common River Water Level Measurement Methods

The protection level of the whole machine is as high as IP66/IP67, which can effectively prevent dust from inhaling, and can be immersed in water for a short time. At the same time, the probe is made of high explosion-proof grade (Ex d IIC T6 Gb) and PVDF material. It is very suitable for applications in harsh and noisy outdoor environments with corrosive liquids, harsh working conditions, and strong interference.

In addition, the ultrasonic liquid level Sensor has a variety of ranges to choose from. The longest can be measured at 15 meters. Very suitable for long-distance detection and tank level detection.

In addition to the use of ultrasonic level Sensors for water level monitoring. Users can also use radar, depth water level sensors, and other technologies to monitor the water level. Instead, use an ultrasonic liquid level. It is a liquid-level measuring instrument with a low maintenance cost and wide application range at present. Users can accurately obtain all required data. And with high-cost performance, it is favored by the majority of users.

Extended reading: Hydrostatic Level Measurement

Featured Water Level Monitoring Sensors

LT series Digital Display Magnetostrictive liquid level sensor
SI-U01 Float Level Sensor
ULT-100A Ultrasonic Level Transducer
Portable Ultrasonic Liquid Level Indicator
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
80GHz FMCW Level Radar
Differential pressure(DP) level transmitter
Magnetic Level Gauge/Indicator
SIRD-701 Guided Wave Radar Level Sensor
ULT-200 Ultrasonic Level Detector
SI-U03 Float Switch Water Level Controller
SIRD-908 Radar Water Level Sensor

SI-151 Hydrostatic Level Sensor
SI-10 Liquid pressure sensor
SI-PCM261 Submersible Pressure Transducer
SI-PCM260 Deep Well Water Level Sensor
Remote Seal Differential Pressure Transmitter
SI-U02 Multi-Point Liquid Level Float Switch

Wastewater/sewage pipe network flow and liquid level online monitoring solution

The online monitoring system for the flow and liquid level of the drainage/sewage pipe network is an important part of the intelligent drainage construction in Anhui. Through this system, the management department can globally grasp the operating status of the drainage pipe network, effectively identify the silting pipe section, and discover the abnormality of the manhole cover in time. In order to quickly respond to flood prevention and protect residents’ travel safety.

On-site monitoring equipment composition:

  • Well monitoring RTU: battery-powered, IP68 waterproof RTU
  • Water level detection equipment: drop-in level gauge (ultrasonic level gauge and other level gauges can also be used)
  • Manhole cover status detection equipment: travel switch (limit switch)
Extended Reading: 3 inch (3″) Water Flow Meter

System implementation instructions

1) The limit switch is installed under the manhole cover. When the manhole cover was closed, it just touched the contact of the travel switch. When the manhole cover is moved, the contact state of the limit switch changes. Such as from “open” to “closed”. And output this state change signal to the manhole monitoring RTU through the cable.

2) The probe of the throw-in water level gauge is installed at the bottom of the manhole and fixed firmly. Real-time detection of water level data in the manhole. And output the data to the manhole monitoring RTU through the cable.

3) Under normal circumstances, the well monitoring RTU regularly (time interval can be set) transmits the status and water level data of the well cover to the monitoring center through the GPRS/CDMA/4G/NB-IoT network. When the state of the manhole cover changes or the water level data exceeds the preset alarm value. The well-monitoring RTU reports alarm information to the monitoring center in real-time.

4) The center’s drainage pipe network monitoring system software dynamically displays the water level data and manhole cover status of each manhole. It provides query, statistics, and analysis functions, and prompts alarm information in various forms such as pop-up windows, prompt sounds, and short messages.

System functions

  • Monitor the water level of the wells at the important nodes of the pipeline network, and detect the siltation and blockage of the pipeline network in time.
  • Monitor the status of the manhole cover, and immediately alarm when the manhole cover is lost or displaced.
  • Provide timely warning information on the operation of the pipeline network to provide a decision-making basis for emergency flood prevention work.
  • Diagnose the bottleneck pipe section in the drainage pipe network, and provide a basis for the pipe network transformation.
  • Provide analytical data for evaluating the drainage capacity of low-lying and flood-prone areas.
  • Trace the historical status of the pipeline network operation to assist in accident analysis.

Extended reading: Radar Level Sensor Working Principle

Water Level Sensor Working Principle

The function of the water level sensor is to detect the water level. The water level sensor is widely used in electrical appliances and industrial equipment that require water level control. The water level sensor can realize the function of water shortage protection.

Principle of water level sensor:
The water level sensor has a sensor. Transform the sensed water level signal into a current signal.

There are many types of water level sensors, so their specific measurement principles are different.
If you need to learn more. You can refer to:
Differential pressure type liquid level measuring instrument;
Float level measuring instrument;
Electric liquid level measuring instrument;
Ultrasonic liquid level measuring instrument;
Radar liquid level measuring instruments, etc.

Extended reading: Capacitive water level sensor

More level measurement solutions

Frequently
Asked
Questions

Help Center

If it is just an ordinary tank or well water level measurement. Then our first choice is the hydrostatic pressure submerged liquid level sensor. Also called hydrostatic level sensors.

Because of its lowest cost. Installation, use and maintenance are very simple.

Extended reading: Float Switch Water Level Controller

There are many kinds of sensors that can measure the water level. Or, it can be said that almost all types of liquid level sensors can be used to measure the water level.

Accurately measure the water level. In turn, the water level can be better controlled within the allowable range. It is of great significance to ensure safety and improve economic efficiency.
for example:
Many types of equipment in thermal power plants need to maintain a normal water level in order to operate safely and economically.
For example, boiler drum water level, deaerator water level, steam turbine condenser water level, high and low-pressure heater water level, etc.

Extended Reading: FMCW Radar for High Temperature Level Sensor

Extended Reading: Wireless Water Meter

Sino-Inst offers over 50 Water Level Monitoring sensors/Systems for Sewage-Wastewater. About 50% of these are Radar level meters, 40% is magnetic level sensor.

A wide variety of Tank Level Gauges & Indicators for Water Level Monitoring sensors/Systems for Sewage-Wastewater options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Water Level Monitoring Sensor/System for Sewage-Wastewater instrumentation, located in China.

Request a Quote

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Tank Level Gauges & Indicators

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Tank level gauges are instruments used to indicate and control the height of the liquid level in the tank. Commonly used in water storage tanks, oil storage tanks, and underground tanks. Tank level gauges are also often called Tank level Indicators or liquid level sensors. They are mainly for the level of liquid in the tank. There are many types of Tank level gauges supplied by Sino-Inst. Including floating ball, magnetic, radar, ultrasonic, and hydrostatic pressure, etc.

Technical Support Level Sensors

You may have heard a lot of sayings, tank level gauges, tank level sensors, and tank level transmitters. Next, we will briefly introduce them.

The tank level gauge is a kind of level meter used to measure the low and high levels of the liquid level. The position of the measured liquid medium in the container (including tanks, storage tanks, and spherical tanks). Liquid level. The meter that measures the liquid level has been changed from a “liquid level gauge” to a “level gauge”. Level gauges include tuning fork level gauges, float level gauges, magnetic flap level gauges, drip level gauges, radar level gauges, and so on.

Extended reading: Industrial Tank level indicators and Tank Level Gauges

Tank level sensor is a common sensor for measuring liquid level position. It converts the height of the position into an electrical signal for output. The liquid level sensor is a modular circuit. It has the advantages of acid resistance, moisture resistance, shock resistance, and corrosion resistance. The circuit contains a constant current feedback circuit and an internal protection circuit. The maximum output current can be made to not exceed 28mA. Therefore, the power supply can be reliably protected and the secondary meter is not damaged. In general, it is used in electrical appliances and equipment that require water level control.

Extended reading: Ultrasonic liquid level sensors

The liquid level transmitter has a further function than the liquid level gauge and the liquid level sensor. For example, when the float moves up and down with the liquid level. An electrical signal will be generated in a metal tube. However, this electrical signal is often irregular in size and cannot even be used for future circuits. For this reason, a circuit was installed near the pipe. The purpose is to convert this non-standard electrical signal into a standard electrical signal (such as 4-20MA, 0-10V, etc.). It can be output to other instruments or devices for display or control. This device is called a “level transmitter”.

Extended reading: GWR Corrosive Liquid Chemical Level Sensor

Although, tank level gauge, tank level sensor, and tank level transmitter are essentially different. But people are used to mixing these terms. Therefore, our tank level gauges below also include level sensors and transmitters.

Featured Tank Level Gauges

LR series Integral flange Magnetostrictive level sensor
LT series Digital Display Magnetostrictive liquid level sensor
SI-U01 Float Level Sensor
SI-U02 Multi-Point Liquid Level Float Switch
ULT-100A Ultrasonic Level Transducer
Portable Ultrasonic Liquid Level Indicator
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
SI-151 Hydrostatic Level Sensor
80GHz FMCW Level Radar

SIRD-701 Guided Wave Radar Level Sensor

Magnetic Level Gauge/Indicator
Differential pressure(DP) level transmitter

Tank Level Gauges Types

No.Gauge typeMain featuresDisadvantageInstallation methodPrice
1Ultrasonic level gaugeNo direct contact with the medium, only the gas phase part. Read more about: Ultrasonic Tank Level Sensors for Tank Level MonitoringThe accuracy is relatively low. It is not possible to measure pressure vessels. Cannot measure volatile media.Top installation, the device needs to be cutMedium
2Radio Frequency Admittance Level GaugeMeasurable interfaceIt is not easy to calibrate. The measuring medium must not be vicious. Otherwise, the probe hanging material will affect the measurement accuracyHole on the top of the deviceMedium
3Magnetic flap level gaugeIntuitive and easy to installThe magnetic ball gets stuck easily. Make it impossible to transmit instructions remotelyTo connect to the device, need to open a holeLow 
4Differential pressure level gaugeWide range of popularization, easy to calibrateIt is closely related to the change of medium density. When measuring corrosive media, the material requirements of the instrument diaphragm are very high.The device needs to be openedLower middle class
5γ-ray level gaugeNon-contact measurement with medium, high accuracyNuclear radiation is harmful to the human body and is not suitable for large diameter containersThe device does not need to open holesHigher
6Float level gaugeIndirect contact with the medium, the floating ball has strict requirements for sealingCannot measure viscous mediaHole on the top of the deviceLow
7Externally attached liquid level gaugeCompletely non-contact measurement. It can be used in harsh environments and is easy to install. Easy to maintain.The viscosity of the medium is less than 10 mpa.s, and the medium cannot contain a lot of bubbles.The device does not need to open holesMedium
8Magnetostrictive level gaugeHigh-precision measurement. Large range measurement. The liquid level and interface can be measured at the same time. Suitable for oil-water mixing measurement.If the medium is in direct contact, the floating ball sealing requirements must be strict, and the viscous medium cannot be measured.The device needs to be openedUpper middle class
9Hydrostatic pressure level gaugeHigh measurement accuracy; easy installation; signals can be transmitted remotely and remotely;
It can resist the corrosion of various media by choosing different materials; it is suitable for explosion-proof occasions;		The measurement signal needs to be converted; the density of the measurement medium must be uniformThe device needs to be openedLow
10Radar level gaugeThe measurement accuracy is high and the application range is wide.When there are obstacles such as stirrers and pipelines in the storage tank, these obstacles will also reflect electromagnetic wave signals, thereby generating false liquid level signals.The equipment needs to be openedHigher
11Guided wave radar level gaugeGuided wave radar level gauge is not limited by the dielectric constant; the measurement of the fluctuating medium is more stableNot suitable for measuring corrosive and adhesive liquids, nor suitable for occasions with high food grade requirementsThe equipment needs to be openedHigher

Extended reading: Radar Oil Tank Level Sensor

The float level gauge is designed based on the Archimedes buoyancy principle and magnetic coupling. With its simple structure, easy operation, good reliability, high accuracy, and low consumption. It is commonplace in industrial applications and is quite popular.

It is widely used in the industrial measurement and control of the liquid level of various liquid tanks such as dam (reservoir) water level detection, sewage treatment, petrochemical raw material storage, food and beverage, and underground storage of gas stations.

When using the float level timer, you should choose different materials to adapt to it according to the chemical properties of the liquid.

Depending on the density of the liquid, different floats can be selected to match it to achieve the best measurement accuracy.

A magnetic Level Gauge is also called a magnetic level indicator. Magnetic Level Gauge is developed based on the principle of buoyancy and magnetic effect. The magnetic float in the measuring cylinder drives the two-color turning column on the external display of the measuring cylinder to flip with the increase (decrease) of the liquid level to be measured. As the position of the float changes, the indicator moves up and down the same amount. Supports top-mounted and side-mounted. It can be used for liquid level detection in high temperature, low temperature, high pressure, strong corrosion, highly toxic and dangerous environments.

Extended reading: fuel tank liquid level sensor 4-20ma

The glass tube level gauge is equipped with connecting flanges on the upper and lower valves of the instrument. The flange joint is welded with the container under test to form a communicating device. Therefore, the height of the medium level in the container can be directly displayed on the glass tube.

Safety steel balls are installed in the upper and lower valves of the glass tube level gauge. When the glass tube is broken due to an accident. The steel ball can block the passage under the action of the working pressure of the container. This way the valve will automatically seal. To prevent the medium in the container from continuing to flow out.

The lower end of the glass tube level gauge is equipped with a sewage valve. It is used for sampling, flushing or draining residual liquid by operators during normal production.

The glass tube level gauge is suitable for the measurement of the liquid level in various storage tanks, tanks, towers, and other containers in the petrochemical industry.

The purely mechanical structure has no electronic components. There will be no instability of electronic liquid level products. Therefore, operating costs are lower. At the same time, it is more reliable than the electronic type. Magnetic flap level gauges, glass tube level gauges, glass plate level gauges, buoy level gauges, etc., are all mechanical liquid level display instruments that are currently used in the domestic market. They are widely used in petroleum, metallurgy, chemical, papermaking, and other industries.

Compared with the electronic level gauge, the biggest feature of the mechanical level gauge is that the internal structure is very simple and the counting is intuitive. A variety of materials are available, which can be anti-corrosion and explosion-proof, and can be adapted to various installation environments.

Common Applications of Tank Level Gauges

It can be said that almost all types of level gauges can measure the level of the water storage tank.

You can choose the appropriate level gauge according to your own installation method, accuracy requirements, installation requirements, cost budget, etc.

Read more about Water level sensor Solutions

Diesel fuel tank level gauges for industrial oil storage tanks are very important, for level monitoring. Can be divided into mechanical and electronic.

Diesel tank gauges are installed onto industrial diesel tanks. It is used to directly or indirectly measure the liquid level of oil and other media. for the purpose of monitoring fuel consumption or reserve. They are often combined with a diesel tank alarm. This can effectively detect and control diesel fuel consumption.

Read more about:

Diesel fuel tank level gauges & Indicators

Oil-water Interface Level Measurement Guide

Propane tank level indicator is also called propane tank gauge level indicator, or propane tank level gauge. What kind of level gauge is used for Industrial propane level measurement?

Propane is a gas that can be liquefied. Chemical formula CHURCH, colorless, liquefiable gas. Slightly soluble in water, soluble in ethanol and ether.
Common Industrial Propane Tank Level Indicators for Industrial Tank Level Measurement include radar level sensor; magnetostrictive level sensor; float level gauge; magnetic flap level gauge; ultrasonic level gauge.

Read more 5 Industrial Propane Tank Level Indicators

There are many types of liquid level measuring instruments. But in the process of measuring LPG liquid level gauges. Due to the particularity of the medium, some measuring instruments cannot meet the requirements of the on-site working conditions. The current technology is constantly flying over at any time. Like the radar level The birth of the pressure gauge and the differential pressure level completely solved this problem in the LPG liquid level gauge measurement process.

Like plane radar, guided wave radar, high-frequency radar, etc. From the characteristics of these types of radar level gauges, guided wave radar is widely used. The difference between guided wave radar level gauges and other radars is that the guided wave radar liquid The position gauge needs to be in contact with the medium to measure. Therefore, its use cost is also low.

Extended reading: ultrasonic level sensor price

For buried tanks, liquid level timing should be selected. First of all, according to its structural design, only the top-mounted liquid level gauge can be used. Of course, there are many types of top installations. We can make and order according to our own specific working conditions when we choose.

The top-mounted level gauges include ultrasonic level gauges, radar level gauges, top-mounted magnetic flap level gauges, top-mounted float level gauges, drop-in level gauges, and so on. These are different according to their respective working conditions and functions. The price is also different. It is necessary to consider the sum of all aspects.

Extended reading: Non Contact Liquid Level Sensor Working Principle

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Read more about: How to Choose the Right Diesel Fuel Level Sensor ?

Sino-Inst offers over 50 Tank Level Gauges & Indicators for level measurement. About 50% of these are Radar level meters, 40% is the magnetic level sensor.

A wide variety of Tank Level Gauges & Indicators for level measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Tank Level Gauges & Indicators instrumentation, located in China.

Request a Quote

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List of Radar Level Sensors

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Non-contact radar level sensor

Radar level sensors are used for continuous non-contact level measurement of liquids or solids. And convert it into electrical signals. The radar level sensor emits high-frequency radio frequency pulses from its antenna. The pulse passes through the air gap. Reflects on a liquid or solid surface and returns to the antenna. The radar level sensor determines the flight pulse time and converts it to level height or distance. It can provide reliable liquid level measurement in difficult tanks with foam, steam, temperature or pressure, or liquid storage tank applications. Or dusty silos, silos, stockpiles, crushers, or transfer station applications. It contains 3-30 meters of grains, granules, powder, or aggregates.

Get a Quote Radar Level Measurement

List of Radar Level Sensors

Radar Level Transmitters – 120GHz

Series
SI-FMF11
SI-FMF12
SI-FMF13
SI-FMF15
SI-FMF21
Applicable medium:LiquidLiquid Liquid Liquid Solid
Measuring range:0.05m~30m0.05m~35m0.1m~100m0.1m~35m0.3m~150m
Antenna:32mm lens antenna42mm lens antenna78mm lens antenna78mm lens antenna78mm lens antenna + purging (or without purging)
Accuracy:±2mm±2mm±2mm (range below 35m)
±5mm (range between 35m-100m)		±2mm±5mm
Medium temperature:-40～80℃-40～110℃-40～110℃-40～200℃-40～110℃
Medium pressure:-0.1～0.3 MPa-0.1～1.6MPa-0.1～0.3MPa-0.1～2.5MPa-0.1～0.3MPa
Signal output:Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus		Two-wire system/4…20mA/HART protocol
Four-wire system 4…20mA/ RS485 Modbus
Power supply:Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V		Two-wire system/DC24V
Four-wire system/DC12~24V
Four-wire system/AC220V
Shell:Aluminum/plastic/stainless steelAluminum/plastic/stainless steelAluminum/plastic/stainless steelAluminum /Plastic /Stainless steelAluminum/plastic/stainless steel
Process connection:G1½A / 1½NPT thread / flange ≥DN50G2A thread/flange≥DN65Flange ≥DN80Flange ≥DN80Flange ≥DN80

Radar Level Transmitters – 80 GHz

 64-80GHz FMCW Level Radar
SeriesLM78x0LM78x1LM78x2
Applicable medium:For normal solid applicationFor liquid applicationFor large range solid application
Measuring range:0.3 m ~ 60m0.08m~30m0.6m ~ 120m
Antenna:Lens antenna/
anti-corrosive antenna /
flange isolated by quartz		 Lens antenna/
anti-corrosive antenna /
flange isolated by quartz 		Lens antenna/
anti-corrosive antenna /
flange isolated by quartz
Accuracy:±1mm±1mm±1mm
Medium temperature:T0:-40~85℃;
T1:-40~200℃;
T2:-40~500℃;
T3:-40~1000℃		 T0:-40~85℃;
T1:-40~200℃;
T2:-40~500℃;
T3:-40~1000℃ 		T0:-40~85℃;
T1:-40~200℃;
T2:-40~500℃;
T3:-40~1000℃
Medium pressure:-0.1~2MPa-0.1~2MPa-0.1~2MPa
Signal output:4 ~ 20mA or RS-4854 ~ 20mA or RS-4854 ~ 20mA or RS-485
Power supply:15~28VDC15~28VDC15~28VDC
Shell:Aluminum alloy, stainless steelAluminum alloy, stainless steelAluminum alloy, stainless steel
Process connection:Thread or flangeThread or flangeThread or flange

Radar Level Transmitters – 26 GHz

SeriesSIRD-901 SIRD-902 SIRD-902T SIRD-903 SIRD-904 SIRD-905 SIRD-906 SIRD-908 SIRD-909
Applicable medium:All kinds of corrosive liquidSlightly corrosive liquidCorrosive liquids, vapors, volatile liquidsSolid material, Strong dust
easy to crystallize, condensation occasion		Solid material, Strong dust,
easy to crystallize, condensation occasion		Solid particles, PowderHygienic liquid storage,
Corrosive container		Rivers, Lakes, ShoalRivers, Lakes, Shoal
Measuring range:
10 meters		30 meters20 meters70 meters80 meters30 meters20 meters30 meters70 meters
Antenna:Sealing horn / PTEEHorn Antenna Φ46mm/ Horn Antenna Φ76mm /Horn Antenna Φ96mm / Special CustomInternal tapered rod antenna PVDF / 78mm
Internal tapered rod antenna PFA / 78mm		Horn Antenna Φ76mm / Φ96mm / Φ121mm/Special CustomParabolic antenna Φ196mm /Φ242mmHorn Antenna Φ76mm / Φ96mm / Φ121mm/Special CustomViton / (-40~130) ℃Horn antenna with 76mm/ 96mmHorn antenna with 76mm/ 96mm/ special custom
Accuracy:± 5mm± 3mm±3mm±15mm±15mm±15mm± 3mm± 3mm± 10mm
Medium temperature:-40℃~130℃-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃~130℃(Standard type)
-40℃~250℃(High-temperature type)		-40℃ ~ 130℃-40℃ ~ 100℃40℃ ~ 100℃
Medium pressure:-0.1~0.3 MPa-0.1 ~ 4.0 MPa-0.1~2.0 MPa-0.1~4.0 MPa (Flat flange)
-0.1~0.3MPa (Universal flange)		-0.1 ~ 0.3 MPa-0.1 ~ 4.0 MPa (Flat flange)
-0.1 ~ 0.3 MPa (Universal Flange)		-0.1~4.0 MPaNormal-pressure Normal-pressure
Signal output:4… 20mA /HART （2-wire / 4-wire）
RS485/ Modbus		4… 20mA /HART（2-wire / 4-wire）
RS485/ Modbus		4… 20mA /HART（2-wire / 4-wire）
RS485/ Modbus		4… 20mA /HART （2-wire / 4-wire）
RS485/ Modbus		4… 20mA / HART (2-wire / 4-wire )
RS485/ Modbus		4… 20mA /HART (2-wire / 4-wire )
RS485/ Modbus		4… 20mA/HART (2-wire / 4-wire )
RS485/ Modbus		RS485 / Modbus ( 6~24V DC)
4~20mA / Hart Two-wire ( 24V DC)		RS485 / Modbus ( 6~24V DC)
4~20mA / Hart Two wire ( 24V DC)
Power supply:2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V ）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）2-wire（DC24V）/ 4-wire（DC24V /AC220V）(6 – 24V) DC  / Four-wire
24V DC / Two wire		(6 – 24V) DC  / Four-wire
24V DC / Two wire
Shell:Aluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic /Single chamberAluminum / Plastic / Single chamber
Process connection:Thread, Flange Thread, Flange FlangeUniversal FlangeThread, Universal FlangeThread, FlangeFlange Thread G1½ A″ /Frame /Flange Thread G1½ A″ /Frame /Flange

Radar Level Sensors – 6 GHz

Series
SIRD-801 		SIRD-802SIRD-803SIRD-804 SIRD-805 SIRD-806
Applicable medium:Liquid, slightly corrosive liquidLiquid, especially for corrosive liquidLiquid, especially with pressure and Volatile LiquidSolid particles or block material,
And it is not suitable for solid powder		Liquid, especially suitable for low dielectric constant, sticky, with mixing liquidSolid, especially suitable for high temperature conditions
Measuring range:20m20m35m35m20m15m
Antenna:The Rod Antenna ( PP/PTFE )The Rod Antenna (PTFE)The Horn AntennaThe Horn AntennaThe Horn AntennaThe Horn Antenna
Accuracy:±10mm± 10mm± 10mm± 20mm± 10mm± 20mm
Medium temperature:(-40 ~ 130) ℃-40℃~130℃（Standard type）
-40℃~180℃（High temperature type）		-40℃~130℃（Standard type）
-40℃~250℃（High temperature type）		-40℃~130℃（Standard type）
-40℃~250℃（High temperature type）		-40℃~130℃（Standard type）
-40℃~250℃（High temperature type）		(-40 ~ 400) ℃
Medium pressure:(-0.1 ~ 0.3) MPa(-0.1 ~ 1.6) MPa(-0.1 ~ 4) MPa(-0.1 ~ 0.3) MPa(-0.1 ~ 4) MPa(-0.1 ~ 0.3) MPa
Signal output:(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART(4 ~ 20) mA/HART
Power supply:Two-wire (DC24V)
Four-wire（DC24V / AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）		Two-wire (DC24V)
Four-wire（DC24V/AC220V）
Shell: Aluminum /Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steelAluminum / Plastic / Stainless steel
Process connection:Flange (optional) / ThreadWith PTFE plate flangeFlange (optional) / ThreadUniversal joint flangeFlangeFlange

Radar Level Sensor Advantages and Disadvantages

Advantages of radar level measurement

  • Measurement is not affected by temperature, pressure, or dust
  • User-friendly adjustment saves time
  • Non-contact, continuous level measurement over larger ranges
  • Unaffected by sludge and biomass, dust, foam, oil, grease and other coatings, uneven surfaces, turbulence, pressure, and vacuum
  • Single-frequency radar level sensors for liquid sensing, dual-frequency radar level sensors for level measurement of aggregates, gravel, sand, coal, asphalt, and other solids
  • Simple mounting and push-button calibration

Disadvantages of radar level measurement

  • Very sensitive to build-up on the sensor surface.
  • They are very expensive. Price increases with accuracy.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

Radar Level Sensor Working Principle

Radar Level Measurement and guide wave radar level measurement
Image source: https://instrumentationtools.com/radar-level-measurement/

Very short microwave pulses with very low energy are transmitted and received through the antenna system. The radar wave runs at the speed of light. The operating time can be converted into level signals by electronic components. A special time extension method can ensure stable and accurate measurement in a very short time.

Electromagnetic waves propagate in the air at the speed of light. The distance between the radar level gauge and the surface of the material can be expressed by the following formula: 　　

D = (1/2)*CT

In the formula:

D ———the distance between the radar level gauge and the surface of the material; 　　

C ———Speed of light 　　

T ———Pulse time.

Then the liquid level is: 　　L = E-D

In the formula:

L — liquid level; 　　

E ———The total height of the tank; 　　

D ———Air height.

Even in the presence of false reflections, the new micro-processing technology and the unique ECHOFOX- software can accurately analyze the level echo. By inputting the size of the container, the distance value can be converted into a signal proportional to the level. The instrument can be debugged with empty positions.

Radar Level Sensor Application

From the shape of the tank, Radar Level Sensor can measure the liquid level of spherical tanks, horizontal tanks, cylindrical tanks and cylindrical cone tanks.
As far as storage tank functions are concerned, Radar Level Sensor can measure the liquid level in storage tanks, buffer tanks, microwave tubes and bypass tubes.
From the measured medium, Radar Level Sensor can measure liquids, particles, slurries, etc.

Radar Level Sensor for Solids

Radar Level Sensor is widely used in the measurement of solid material levels in the industry. It has a good measurement effect for the working conditions of extreme dust and various interference factors that affect the measurement in the silo.

  • Material storage level detection in the mining industry. Level detection of silos such as coarse broken silos, fine broken silos and fine ore silos.
  • Storage level detection of materials in the coal industry. Including the level detection of raw coal silos, clean coal silos and other silos.
  • Material storage level detection in the cement industry. Including clinker warehouse, raw meal homogenization warehouse, raw material mixing warehouse, limestone storage warehouse, raw coal warehouse, cement mixing warehouse and other silo level detection.
  • Storage level detection of materials in the power industry. Such as the detection of raw coal silos, pulverized coal silos and dry ash silos in thermal power plants.

Radar Water Level Sensor

Radar Level Sensor is a level detection instrument using microwave technology.

It is mainly suitable for detecting the water level of natural waters such as rivers and lakes. It can also be used to detect the water level of large-scale reservoirs, reservoirs, sewers, and other open-air channels.

As a detection terminal, this product can effectively assist in monitoring water level changes and provide accurate water level information for monitoring units.

The product adopts the pulse radar detection method. It can work stably around the clock. The measurement result is accurate and reliable.

The non-contact detection method makes it more widely used. It can even be used in complex water environments with organic pollutants or sediments.

Ultrasonic vs Radar Level Sensor

What is the difference between Ultrasonic Level Sensor and Radar Level Sensor?

Ultrasonic Level Sensor and Radar Level Sensor are non-contact liquid level measuring instruments. As the name suggests, one uses ultrasonic waves and the other uses electromagnetic waves. In addition, what are the differences between ultrasonic level sensors and radar level sensors?

Ultrasonic Level Sensor

Ultrasonic Level Sensor is a digital level meter controlled by a microprocessor. In the measurement, the pulsed ultrasonic wave is emitted by the sensor (transducer). The sound waves are received by the same sensor after being reflected by the surface of the object and converted into electrical signals.

The distance between the sensor and the object to be measured is calculated from the time between the emission and reception of the sound wave.
Because of the non-contact measurement. The measured medium is almost unlimited. It can be widely used to measure the height of various liquid and solid materials.

Radar Level Sensor

Radar Level Sensor adopts the circuit design of a high-frequency microstrip line structure. The internal circuit generates microwave pulse signals.

Based on the design principle of the high-frequency waveguide, the microwave pulse is emitted from the end of the antenna through the PTFE emitter.

When the transmitted pulse hits the surface of the measured medium. Part of the energy is reflected back and received by the same antenna.

Through the principle of time extension technology, the time interval between the transmitted pulse and the received pulse is calculated. So as to further calculate the distance from the antenna to the surface of the measured medium.

Simply put:

  1. The relative price of Radar Level Sensor is relatively high;
  2. Radar Level Sensor has higher accuracy than ultrasonic;
  3. The measuring range of radar is larger than that of ultrasonic;
  4. When using Radar Level Sensor, consider the dielectric constant of the medium.
  5. Radar Level Sensor has horn type, rod type and cable type. Compared with ultrasonic, it can be applied to more complicated working conditions;
  6. Ultrasonic cannot be applied to working conditions such as vacuum, high steam content or foam on the liquid surface.

Extended reading: The Secret of Ultrasonic Level Measurement

Radar Level Transmitter Calibration

How do you calibrate the radar level transmitter?

Set up the guided wave radar level transmitter

HART communicator, power supply, and the multimeter are as below (see below calibration setup Diagram).

Check the configuration of the lower range value (0% level, 4 mA) and high range value (100% level, 20 mA).
Make sure that the inputted data is as per the datasheet.
For example, the lower range value is 10 inch and the high range value is 35 inches (both of it are measured from the bottom of the level transmitter probe)

Fill the level transmitter chamber with water up to the 0% level.
Read the level measurement in the transmitter LCD (or in the HART communicator). Set this condition as 0% level through the HART communicator.

Read the mA output of the transmitter by using a multimeter.
Adjust (if any) through the HART communicator so that the output of the transmitter (on the multimeter) is 4 mA.

Fill the level transmitter chamber with water up to 100% level.
Read the level measurement in the transmitter LCD (or in the HART communicator). Set this condition as 100% level through the HART communicator.

Read the mA output of the transmitter by using a multimeter.
Adjust (if any) through the HART communicator so that the output of the transmitter (on the multimeter) is 20 mA.

Frequently
Asked
Questions

Help Center

Radar level instruments measure the distance from the transmitter (located at some high point) to the surface of a process material located farther below in much the same way as ultrasonic transmitters – by measuring the time-of-flight of a traveling wave.

A guided wave radar level transmitter is also called a wave-guided radar level sensor. They can measure both levels and the interface between two media. Through probe rod or cable, complete level contact types continuous level measurement. Such as Coaxial Probe Guided Wave Radar Level Transmitter. This is different from ultrasonic level measurement, which is a non-contact measurement. A guided wave radar level transmitter is often used for tank level measurement. Including liquid and solid. Output 4～20mA/HART, so as to measure and control the level during production.

Extended Reading: Guided-wave radar (GWR) level transmitter working principle

Sino-Inst offers over 50 Radar level sensors for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of radar level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of radar level measurement instrumentation, located in China.

Request a Quote

Point Level Measurement Sensors

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What is Point Level Measurement?

Point Level Measurement refers to the use of a point level sensor to detect the material level in a storage tank or silo. Also called point level Indicators, Controls, and Switches. This type of equipment is used when it is not necessary to measure every possible intermediate level. Just like in the case of continuous level measurement.

The point level sensor measures the preset level of liquid, mud, or solid media. And open or close the electrical contact at the desired set point. In some applications, sensors are also used to trigger pumps, valves, or other controls. To return the media to the preset level. Capacitive, ultrasonic, rotary, and vibrating liquid level switches are suitable for almost all applications from bulk solids to liquids and in between.

Get a Quote More Level Sensors

What is a point level sensor?

Liquid level measurement usually has two forms: continuous liquid level detection and point liquid level detection. In continuous level detection, the sensor continuously measures the level of liquid or solid in the tank. The point level sensor measures the preset level of liquid, mud or solid media, and opens or closes the electrical contact at the desired set point.

Point level sensor is also called liquid level switch, or liquid level controller. Point level sensor is used for point level detection. The sensor will detect the liquid at a certain point in the tank or chamber. Generally, this applies to processes that need to be managed at a high or low level.

Point level sensor is suitable for liquid, paste, powder, or bulk solid in a silo. You may encounter problems with property changes, turbulence, foam, vibration, or accumulation, but a wide range of sizes, installations and materials make inspection easy.

Common point level sensors, such as photoelectric level switch (SST sensor), horizontal float switch, vertical float switch, ultrasonic level sensor, tuning fork level switch.

Extended reading: Radar level sensor for solids – Dust solid level measurement

What is a continuous level sensor?

The continuous level sensor is designed to provide level detection through every point in the tank or chamber. This means that regardless of the liquid level, it can provide feedback across the entire range of the container. This is very useful for processes where knowing the level is always important and for applications that require increased accuracy.

Common continuous level sensors, such as submersible level sensors, ultrasonic level sensors, capacitive level sensors.

  • Media type (e.g. bulk, powder, liquid, paste, etc.)
  • Media properties (e.g. bulk density, conductivity, viscosity, etc.)
  • Input conditions (e.g. tank material, tank geometry, installation position, installations within the tank, etc.)
  • Process conditions (e.g. pressure, temperature, ambient conditions, explosion protection, hygiene requirements, etc.)

Extended reading: Applicaitons Of Magnetostrictive Level Transmitters

Point level sensor

A sensor designed for point detection will detect liquid at a certain point in the tank or chamber. Generally, this applies to processes that require high-level or low-level management.

In most cases, they act as switches when the tank level rises or falls to a certain level. This could be an alarm or a bonding device. Essentially, the sensor detects when the liquid has reached the desired point, and it acts as a switch to activate the necessary response.

Read more about: Application 3: Level Measurement In Waste Water Treatment Plants

Continuous level sensor

The continuous level sensor is designed to detect the level through every point in the tank or chamber. This means that it provides feedback regardless of the level and the entire container range. This is great for processes where the level is always important, and for applications that require increased accuracy.

Extended reading: Radar Oil Tank Level Sensor

Looking for a specific type or a custom continuous liquid level sensor? Sino-Inst offers High-quality Liquid level sensors for continuous level measurement.

Level sensors are used in process control in many industries and they fall into two categories. Continuous level measurement sensors and Point level measurement sensors. The point level measurement sensor is used to indicate a single discrete level, that is, to indicate a preset level.

The function of this type of sensor is the upper limit alarm, which indicates the overfill condition, or the lower limit alarm condition. Continuous level sensors are more complex, allowing level monitoring of the entire system. They measure the level of the liquid level in a range, not the level of a point. Continuous level sensors produce an analog output that is directly related to the liquid level in the container. To build a level measurement system, this output signal is transmitted to the process control loop and visual indicators.

Read More: Continuous Liquid Level Measurement

Types of Point level measurement

Liquid level measurement is a key link to realize the automated production of industrial processes. According to the difference of its output, it can be divided into Point level measurement and continuous quantity measurement. A wide variety of liquid level switches have caused many obstacles to the correct selection of users. For this reason, the common classifications of liquid level switches are introduced as follows. Hope to be helpful to instrument users.

Extended Reading: What is level transmitter working principle?

After the probe of the capacitive liquid level switch is exposed to liquid, it detects the change of the capacitance value and outputs the contact signal. Generally speaking, capacitive liquid level switches have certain advantages in the measurement of slightly viscous media.

Extended reading: Capacitance level sensor advantages and disadvantages

The electrode type liquid level switch mainly uses the conductivity of the liquid to detect the height of the liquid level. Once the measured medium touches the pole, it will conduct electricity and detect the signal. After the signal is amplified by the controller, it will output a contact signal to realize the control of the liquid level.

The magnetic float of the float level switch rises or falls with the liquid level so that the sensor detects the reed switch chip at the set position in the tube. It sends out contact on/off switch signal. Due to the simple structure of the float level switch, it is economical and practical. It is widely used in the civilian market. But compared with industrial-grade products, its stability is relatively poor.

Extended reading: Oil-water interface measurement-Magtech magnetic level indicator

The photoelectric liquid level switch mainly uses the principle of light refraction and reflection. It is detected by infrared rays. Because the light will reflect or refract at the interface of two different media. When the measured liquid is at a high level, the measured liquid and the photoelectric switch A kind of interface is formed. When the measured liquid is at a low position, the air and the photoelectric switch from another interface. These two interfaces make the reflected light intensity received by the light-receiving crystal inside the photoelectric switch different. That is to say, there are two corresponding interfaces. Different switch states. Generally speaking, the applicability of photoelectric switches is poor compared with other measuring instruments.

Extended reading: Non contact level measurement

HS-ULC Ultrasonic Level Switch-External Mounted

The instrument probe of the ultrasonic external liquid level switch emits ultrasonic waves and detects its after-vibration signal in the container wall. When the liquid flows over the probe, the amplitude of the after-vibration signal will become smaller. The instrument will output a signal after detecting the change Switch signal. Because the ultrasonic external liquid level switch is a non-contact measuring instrument, it is mostly used in the scene where it is not easy to open holes and high risk. But relatively speaking, its cost is relatively high.

Extended reading: The Secret of Ultrasonic Level Measurement

The tuning fork liquid level switch mainly outputs a switch signal by detecting the changes in the frequency and amplitude of the fork vibration. Its versatility is strong, but it is necessary to consult the manufacturer for working conditions with high viscosity. For working conditions that are easy to crystallize, it is not recommended.

Extended reading: ​Solid flow meter | For bulk solids-powder-soybean-cement 

Featured Level switches for point level measurement

ULT-100A Ultrasonic Level Transducer
ULT-200 Ultrasonic Level Detector
Portable Ultrasonic Liquid Level Indicator
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
HS-ULC Ultrasonic Level Switch-External Mounted
HS-ULC-Pro Ultrasonic Non-contact Liquid Level Controller
Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank
RF Admittance Level Sensor

SI-LT Magnetostrictive level transmitter with Local Digital Display
SI-80 Radar Level Sensors

SI-U02 Multi-Point Liquid Level Float Switch

SI-U01 Float Level Sensor

Extended reading: Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

Sino-Inst offers over 10 Point Level Measurement Sensors. About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of Point Level Measurement Sensors options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Point Level Measurement Sensors instrumentation, located in China.

Request a Quote

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Contact and Non-contact | Capacitive water level sensor

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A capacitive water level sensor is often used to measure the water level of the water storage tank. The capacitive water level sensor uses the change of measuring capacitance value to measure the height of the liquid level. The main function is to continuously measure the liquid level of the measured medium liquid. For example, common media are sewage, mud, paper pulp, eight-treasure porridge, and so on. You may also have heard of a non contact capacitive water level sensor. It is a kind of capacitive water level sensor installed externally.

Get a Quote Level Sensors

What is a capacitive liquid level sensor?

The Capacitive liquid level sensor is based on the principle of capacitance sensing. When the height of the measured electrode is changed by the measured medium, it will cause its capacitance to change. It can convert the changes of various material levels and the height of liquid level media into standard current signals, which are remotely transmitted to the operation control room for centralized display, alarm or automatic control by secondary instruments or computer devices.

Capacitive liquid level sensor has a good structure and installation method, which can be applied to high temperature, high pressure, strong corrosion, easy to crystallize, anti-clogging. Anti-freezing and solid powdery and granular materials.

The Capacitive liquid level sensor fundamentally deals with the influence of factors such as temperature, humidity, pressure, and material conductivity on the measurement process. Therefore, it has extremely high anti-interference and reliability. It can measure strong corrosive liquids, such as acid, alkali, salt, sewage, etc.

Can measure high temperature and high pressure medium. Process temperature -40~600℃. Process pressure -0.1~4.0MPa.

A single intelligent integrated capacitance level gauge has common two-point on-site calibration skills, which provides convenience for users to easily use the product.

Capacitive liquid level sensor can measure the liquid level of strongly corrosive medium, measure the liquid level of high temperature medium, measure the liquid level of sealed container. It has nothing to do with the viscosity, density and working pressure of the medium.

Extended reading: Ultrasonic liquid level sensors

Capacitive water level sensor

Can capacitive liquid level sensors measure water?

OK. Because water is conductive. Except for pure water, ultra-pure water, industrial water has no special instructions, it is generally regarded as a conductor.

Capacitive water level sensor is when measuring water. The water contains rust, jelly, etc. Will it cause measurement fluctuations?

probably not. When measuring water, there are two plates: one is the metal rod of the capacitor itself. And the other is actually water. Because general water is conductive. The dielectric is actually the film on the outside of the Capacitive water level sensor metal.

  1. When the tank is a conductor: because water is conductive. Except for pure water, ultrapure water, industrial water without special instructions is generally regarded as a conductor. So it forms the other plate of the capacitor. When the metal tank is used to measure the conductor level with a capacitor, the dielectric is the layer of PTFE.
  2. If the tank body and process connection are non-conductive materials. Then, a conductor should be led down from the ground terminal of the meter casing along the outside of the tank as another plate. The dielectric at this time is membrane + medium + tank wall.
RF Admittance Level Sensor
Capacitance Level Transmitter

Non contact capacitive water level sensor

Non contact capacitive water level sensor, you only need to attach the sensor to the outer wall of the container made of insulating material when using it.

When the liquid level reaches the sensor detection position, there is a level signal output. It is easy to install and use, no need to open holes, and durable life. Capacitive type can detect the liquid level through the medium. No direct contact with liquid is required. It will not be affected by corrosive effects such as strong acids and alkalis, and it is more hygienic.

Extended reading: Radar Non Contact Water Level Sensor

Features of Non contact capacitive water level sensor:

  1. Small size and high cost performance. Waterproof grade IP62. Ultra low standby function
  2. The liquid level can be detected through the medium without direct contact with the liquid. It will not be affected by corrosive effects such as strong acids and alkalis, and it is more hygienic.
  3. No need to open holes without mechanical parts inside. Only need to be installed on the outer wall of the container to achieve non-contact use
  4. Integrated filtering, debounce, and A/D conversion circuit. Directly output high and low levels.
  5. Accuracy, high reliability, no virtual area, no gray sensing area
  6. Meet the requirements of safety standards
  7. Comply with RoHS requirements
  8. The sensitivity can be matched according to the customer’s application

Non contact capacitive water level sensor application:
It can be used to detect water purification, sewage, oil, wine, various acid-alkaline liquid levels, etc. Mainly suitable for household appliances, medical equipment, chemical equipment, business machines, etc. Your equipment needs level control. Our products will meet your liquid level measurement needs.

Extended reading: Ultrasonic level transmitter for Hazardous Liquids

Compared with non contact capacitive water level sensor and float type liquid level sensor:

  1. It can be used when installed on the outer wall of the container, and the container does not need to be opened. The water level can be detected non-contact.
  2. Small size, small space required for installation
  3. The float type liquid level sensor needs to be in contact with the liquid to detect the liquid level. The internal magnet will adsorb impurities in the water to form scale. Scale will cause the weight of the float to increase and affect the accuracy of liquid level detection. The Non contact capacitive water level sensor does not directly contact the liquid, and there is no such restriction.
  4. The float type liquid level sensor uses the rise and fall of the liquid level to drive the movement of the float with a magnet. So that the internal dry reed switch is turned on and off. Therefore, the float type liquid level sensor has a certain draft, the float is easy to jam, and the reliability is low. The Non contact capacitive water level sensor has no mechanical moving parts and has high reliability.

SI-U01 Float Level Sensor
SI-U02 Multi-Point Liquid Level Float Switch
SI-U03 Float Switch Water Level Controller
SI-U04 Magnetic Float Level Sensor-Reed Switch
SI-U05 Cable Float Level Sensor & Swtich

Frequently
Asked
Questions

Help Center

  1. Under stable working conditions, due to structural limitations, the compensation problem of system measurement errors caused by the adiabatic temperature of the water side cannot be completely solved. Under accident conditions such as boiler shortage or full water, excessive system measurement errors may bring serious consequences
  2. The structure is complex, and there are many static sealing points. The scale of construction is large and there are problems of heat preservation in winter.
  3. The measurement time lag is long, and the boiler water level change cannot be reflected immediately. The quality of the measurement signal adjustment is poor.
  4. Due to the exothermic heat of the condensing cylinder, the use cost is extremely high.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

The capacitance level switch determines whether there is liquid by detecting the conductivity or insulation rate of the medium. It can be simply understood as judging whether the liquid has reached a fixed water level according to the size of the capacitance value. The capacitor is formed between the liquid level switch and the medium in which it is located. When liquid is detected, the capacitance value changes greatly.

Extended reading: Radar Level Sensor Working Principle

More Water level sensors

Water depth sensors are also known as water level sensors. Water depth sensors are often used to measure tank levels, well depths, river depths, etc. There are many different types of water depth sensors. All of them are used to measure the water level by submerging underwater or above the water surface. Then, they are converted into a water depth or water level signal. For example, submersible hydrostatic level meter, ultrasonic level meter, etc.

SI-151 Hydrostatic Level Sensor
SI-10 Liquid pressure sensor
SI-PCM261 Submersible Pressure Transducer
SI-PCM260 Deep Well Water Level Sensor
Remote Seal Differential Pressure Transmitter
Differential pressure(DP) level transmitter

Extended reading: Non contact level measurement

Sino-Inst offers over 20 Capacitive water level sensors for level measurement.

About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of Capacitive water level sensors options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

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Ultrasonic level transmitter VS Radar level transmitter

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Radar level transmitter and Ultrasonic level transmitter are both liquid level measuring instruments. The most obvious difference is that one uses electromagnetic waves and the other uses ultrasonic waves. So, besides that, what is the difference between a Radar level transmitter and an Ultrasonic level transmitter?

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List of Differences: Radar vs Ultrasonic Level Measurement

Here, we first list the main differences between radar level gauges and ultrasonic level gauges. You can get answers directly and clearly.

  • The radar level gauge uses the microwave generated by the radar to complete the measurement work. Ultrasound is realized in the form of sound waves. This is also the essential difference between the two.
  • The temperature of the measuring medium is different. The temperature of the medium measured by the ultrasonic level gauge does not exceed 80°C. The radar level gauge is different, the medium temperature can be as high as 1200 ℃.
  • The operating conditions and environments are different. There are many styles of radar level gauges, such as: horn type, drop type, rod type, etc., so it can be applied to different working conditions. Ultrasonic liquid level gauges cannot be used in working conditions such as vacuum and corrosion-resistant liquids.
  • Accuracy and range are different. The accuracy of radar level gauge is much higher than that of ultrasonic level gauge. The range of the radar level gauge can reach 0-100M, and the range of the ultrasonic level gauge is only 0-30M.
  • This is about the price. Relatively speaking, the radar level gauge has a wide range of applications and a high temperature measurement medium. The price is also understandable. If the ultrasonic level gauge can meet the demand, it can also be selected.

The above 5 points have briefly summarized the differences between radar liquid level measurement and ultrasonic liquid level measurement.

Therefore, when we purchase, which instrument to choose as our measuring instrument should be combined with the conditions of our measured medium before making a choice. Don’t choose blindly.

If you want to continue to understand the details of Radar vs Ultrasonic Level Measurement, then please read on.

Ultrasonic technology is not only used to measure level, but also can be used to measure depth. Get more.

Extended Reading: Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

Ultrasonic VS Radar level transmitter – working principle

  1. Radar level transmitter

Radar level transmitter adopts the circuit design of a high-frequency microstrip line structure, and the internal circuit generates a 25GHz microwave pulse signal. Based on the design principle of the high-frequency waveguide, the microwave pulse is emitted from the end of the antenna through the PTFE emitter. When the transmitted pulse hits the surface of the measured medium, part of the energy is reflected back and received by the same antenna. Through the principle of time extension technology, the time interval between the transmitted pulse and the received pulse can be calculated. Then calculate the distance from the antenna to the surface of the measured medium.

Extended Reading: bin level measuring system

  1. Ultrasonic level transmitter

An ultrasonic level transmitter is a digital level meter controlled by a microprocessor. In the measurement, pulsed ultrasonic waves are emitted by the sensor (transducer). The sound waves are received by the same sensor after being reflected by the surface of the object and converted into electrical signals. The distance between the sensor and the object to be measured is calculated from the time between the emission and reception of the sound wave. Due to the non-contact measurement, the measured medium is almost unlimited. It can be widely used to measure the height of various liquid and solid materials.

From the above two principles, we can see the following two differences:

  1. Radar level transmitter emits electromagnetic waves. The wave speed has nothing to do with ambient temperature, smoke, pressure, etc. It’s the same even in a vacuum. The propagation speed is always the speed of light.
  2. Ultrasonic level transmitter emits ultrasonic waves, which are mechanical waves. Like sound waves, its propagation speed is closely related to the state of the propagation medium. Ultrasonic level gauges are used to measure the liquid level of atmospheric vessels. The probe contains a temperature measuring element that can compensate the temperature of the wave velocity. Because of the material. The temperature range used is relatively not very wide.

Extended reading: The Secret of Ultrasonic Level Measurement

Extended Reading: What is level transmitter working principle?

Read more about: Common River Water Level Measurement Methods

Ultrasonic VS Radar level transmitter – transmission method components are different

For example, ultrasonic waves are emitted by the vibration of piezoelectric materials. So Ultrasonic level transmitter cannot be used in high pressure or negative pressure occasions. Generally only used in atmospheric pressure vessels. The Radar level transmitter can be used in high-pressure process tanks.

The launch angle of radar is larger than that of ultrasonic. Non-contact radar is not recommended for small containers or elongated containers. Guided wave radar is generally recommended. Finally, there is the question of accuracy. Of course, the accuracy of radar is definitely higher than that of ultrasound. The high-precision radar must be used on the storage tank instead of ultrasonic. In terms of price, compared with an Ultrasonic level transmitter, the price of a Radar level transmitter is relatively high. Of course, the price of some large-scale ultrasounds is not low. Such as the range of 6 to 70 meters. The Radar level transmitter can’t reach a very large range. Only an Ultrasonic level transmitter can be selected.

Extended reading: Drop Antenna Radar Tank Level Sensor

Extended reading: Dam water level measurement

Ultrasonic VS Radar level transmitter-different applications

The different working principles result in a big difference between the applications of Radar level transmitters and Ultrasonic level transmitters. It is specifically manifested in the following aspects:

  1. Because the Radar level transmitter uses electromagnetic waves. It is greatly affected by the dielectric constant of the measured substance. The ultrasonic wave used in the Ultrasonic level transmitter is a mechanical wave. Mainly affected by the density of the measured medium. Therefore, when the dielectric constant of the measured substance is very low, Ultrasonic level transmitter should be used for measurement instead of Radar level transmitter.
  2. The measurement range of Ultrasonic level transmitter is not as large as Radar level transmitter. Radar emits electromagnetic waves, which can be measured without the aid of a propagation medium. Ultrasonic waves are sound waves and mechanical waves, which need to be propagated by means of a propagation medium. Therefore, the ultrasonic level gauge has many limitations in the application process:

(1) Ultrasonic level transmitter cannot be used in working conditions such as vacuum, high steam content or foam on the liquid surface.

(2) Ultrasonic level transmitter has temperature and pressure limitations. The temperature at the probe of the Ultrasonic level transmitter generally cannot exceed 80 degrees, and the speed of the sound wave is greatly affected by temperature. Ultrasonic level transmitter is greatly affected by pressure, generally within 0.3MPa. Because sound waves are generated by vibration, the sound-producing parts will be affected when the pressure is too high. Extended Reading: GWR Level Sensor for High Temperature & High Pressure

(3) Ultrasonic level transmitters cannot measure well when there is a lot of fog or dust in the measurement environment. More about Top 5 Ultrasonic Level Sensor Applications.

In contrast, because the radar is an electromagnetic wave, it is not affected by vacuum. The applicable range of medium-temperature and pressure is also very wide. With the advent of high-frequency radar. Its application range is even wider. Under the same conditions, the Ultrasonic level transmitter is more limited.

  1. The pressure occasions of the two applications are different. Because of the different transmission methods of radar and ultrasonic components. For example, ultrasonic waves are emitted by the vibration of piezoelectric materials. So Ultrasonic level transmitter cannot be used in high pressure or negative pressure occasions. Generally only used in atmospheric pressure vessels. The Radar level transmitter can be used in high-pressure process tanks.
  2. Radar level transmitter has horn type, pole type, cable type, etc. to choose from. Can be applied to different measurement occasions. Compared with ultrasonic level gauges, Radar level transmitters can be used in more complex working conditions.
  3. The launch angle of radar is larger than that of ultrasonic. Non-contact radar is not recommended for small containers or elongated containers. Guided wave radar is generally recommended. Finally, there is the issue of accuracy. Of course, the accuracy of radar is higher than that of ultrasound. The high-precision radar must be used on the storage tank instead of ultrasonic.
  4. In terms of price, Radar level transmitter is more expensive than Ultrasonic level transmitter. Of course, some large-range Ultrasonic level transmitters are expensive. The Radar level transmitter can’t reach the very large range, so you can only choose the ltrasonic level transmitter.

Extended reading: FMCW Radar Level Transmitter 120GHz

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ULT-100 Ultrasonic Level Indicator
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HS-2000 Ultrasonic Tank Level Sensor-External Mounted
Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank
Alternative to VEGAPULS 64-80GHz FMCW Level Radar
SI-FMF11 FMCW Radar Level Transmitter 120GHz
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SIRD-801 Radar Level Sensor-Suitable for Liquid, Slightly Corrosive Liquid

Extended Reading: Dielectric constant for radar level transmitter

However, whether it is a Radar level transmitter or an ultrasonic level transmitter, you must pay attention to the installation location and blind spots during the installation process. For example, when installing on the tank, do not install it near the feed inlet and the human ladder. At the same time, keep a distance of 300 to 500mm from the tank wall to prevent echo interference. When there is agitation and the liquid level fluctuates greatly, a suitable installation method should also be selected.

Extended reading: guided wave radar level sensor advantages and disadvantages

More Level Measurement Solutions

Our conclusions:

We cannot say that the radar level meter must be better than the ultrasonic level meter.

Both radar level meter and ultrasonic level meter can be better used for liquid level measurement.

But which level meter should be used in practical application? It should be determined according to the process conditions, medium characteristics, combined with installation conditions, use environment and other factors. Read more about: Ultrasonic Level Sensors for Liquids Applications

Sino-Inst has been committed to providing customers with liquid level and material level measurement solutions for many years. Experience. We supply ultrasonic level meter, explosion-proof ultrasonic level meter, radar level meter, hydrostatic pressure level meter, etc.

If you need to choose between the two. Then we must sort out the measurement conditions first, and then choose the appropriate level meter. You can also consult our sales engineers.

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