Non contact water level sensor refers to the radar water level sensor. Radar Water Level Sensor is suitable for water level monitoring of lakes, rivers, reservoirs, open channels, and tidal water levels.

Radar Non-Contact Water Level Sensor adopts a non-contact measurement method and does not touch the water body. It is not affected by water quality, sediment and floating objects. The RS-485/RS-232/4-20mA interface can realize data long-distance wired transmission or docking with SCADA hydrological telemetry system. The measuring distance can be up to 70 meters.

Radar Non Contact Water Level Sensor for water level monitoring installation

Radar Non-Contact Water Level Sensor is a high-precision non-contact water level measuring instrument, no logging is required. It is easy to install and can directly measure the water level of natural rivers.

Radar Non Contact Water Level Sensor field comparison test application test, analyze the accumulated measurement data and comparison test results. In order to expand the test results, provide a basis for the selection of water level gauges, and at the same time improve the water level measurement and reporting conditions of the hydrological station on the upper reaches of the Yellow River.

Let me introduce to you the installation diagram of Radar Non Contact Water Level Sensor.

Preparation and inspection before installation;

Please pay attention to the following matters to ensure that the meter can be installed correctly;

Please reserve enough space for installation;

Please avoid installation situations with strong vibration;

Please see the installation diagram description and installation location of the radar water level gauge below:

When a radar antenna emits microwave pulses, it has a certain emission angle.

There should be no obstacles from the lower edge of the antenna to the surface of the measured medium, and in the area radiated by the microwave beam.

Therefore, shielding facilities should be avoided as much as possible during installation, and “false echo learning” must be carried out when necessary.

Also pay attention when installing the instrument: the highest liquid level must not enter the measurement blind zone. The meter must be connected to the ground, and lightning protection measures should be added. Outdoor shading and rainproof measures should be taken.

If you need to measure river water level, open channel level, etc. The Ultrasonic Liquid Level Sensor can be used for non-contact continuous level monitoring.

If you need to purchase liquid level gauge for CO2 Cylinders, you may like:

CO2 Cylinder | Portable Liquid Level Gauge

Procurement Guide: Ultrasonic liquid level sensors

Non Contact Capacitive Liquid Level Sensor

There are three commonly used non-contact liquid level sensors, namely capacitive liquid level sensors, ultrasonic liquid level sensors, and separate photoelectric liquid level sensors.

The non-contact liquid level sensor means that the liquid level can be detected without contacting the liquid. With this advantage, the application field of the non-contact liquid level sensor has been greatly expanded.

The capacitive liquid level sensor can detect the liquid level by attaching it to the container, so the installation process is simple. Capacitive liquid level sensors are mostly used in the field of home appliances because the positioning is due to the small size and low price of the sensor.

If the capacitive liquid level sensor is installed on the body, the container can be moved arbitrarily. For example, the capacitive liquid level sensor detects the low liquid level of the aromatherapy machine. When the sensor detects that the fragrance in the aroma diffuser bottle is only 20ml, it will give a signal to remind you. After the device receives the signal, it turns on the buzzer to alarm or light up to remind. At this time, the user can take the bottle to add liquid, or directly replace another bottle with a new one.

The disadvantage of capacitive liquid level sensors is that they can only be used on non-metallic containers. And it cannot detect liquids with low conductivity, such as diesel gasoline. It is also unable to detect high-temperature liquids. High-temperature liquid will cause the sensor to fail.

Non contact type water level sensor

Non contact level sensor is when the liquid level gauge measures the liquid level, the sensor does not need to touch the measured medium.

Common non contact level sensors include ultrasonic and radar.

Ultrasonic Level Sensing sensors and transmitters are used for continuous, non-contact level measurement.

Ultrasonic Level Sensing is a low-cost liquid level measurement technology. Ultrasonic Level Sensing sensors and transmitters are used for tank or river level measurement. Ultrasonic Level Sensing does not need to contact the medium, can be continuously measured, low cost. Therefore, Ultrasonic Level Sensing is very popular among users. Ultrasonic liquid level sensors are available in general and intrinsically safe types. Output 4~20mA standard signal or output the measurement result to the secondary meter through RS-485. Meets the system’s automatic control.

Radar level measurement uses Non-contacting radar technology for Continuous level measurement. Liquids and solids are commonly measured with this measuring technique.

Radar level transmitters use radar technology to perform non-contact continuous level measurement. The radar level indicator converts the level into an electrical signal. The level signal output can then be utilised by other instrumentation to monitor or control. Liquids and solids are commonly measured with this measuring technique. Like: Fly ash silo. Radar level sensors are divided into: Pulsed radar technology and frequency modulated continuous wave (FMCW) radar level sensors.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

Featured Non Contact Tank Level Sensors

HS-2000 External Mounted Ultrasonic Tank Level Sensor- (referred to as “external level gauge”). It adopts advanced signal processing technology and high-speed signal processing chip. It breaks through the influence of container wall thickness. Realizes the height of the liquid level in the closed container True non-contact measurement.

The ultrasonic liquid level sensor (probe) is installed directly under the outer wall (bottom) of the container under test. Calibrate the outer wall of the probe. There is no need to open holes for the container to be tested, easy to install, and does not affect production. It can accurately measure the level of various toxic substances, strong acids, strong alkalis and various pure liquids in high-pressure airtight containers.

The HS-2000 External Mounted Ultrasonic Tank Level Sensor has no special requirements for the material of the liquid medium and the container. The explosion-proof design is adopted to meet the explosion-proof requirements.

Portable ultrasonic liquid level indicator is best choice for tanks or pipes level measurement. It is designed to measure the presence or absence of liquid at a certain height position in a tank or in pipelines. Non-contact ultrasonic detection technology.

SI-ML works perfect for detection of dangerous toxic or corrosive liquids. Under ordinary conditions, the maximum wall thickness of measurable containers is 30mm. The product is suitable for the detection of various types of liquids. Liquids are non-crystalline or other particulate matter. For example CO2 Tank. Thanks to non-contact detection technology, this level indicator is ideal for detecting hazardous toxic or corrosive liquids.

Read more about: Ultrasonic Water Level Sensors

More Water Level Sensors

Sino-Inst offers a variety of water level sensors for a wide range of conditions. Our sensors are ideally suited for monitoring water levels in streams, dams and reservoirs. Our water level sensor products include:

• Submersible Pressure Transducers
• Radar Level Sensors
• Magnetostrictive Level Sensors
• Pressure Transducers
• Ultrasonic water level sensor

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

A wide variety of Radar Non Contact Water Level Sensor for level measurement 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.

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

Radar water level sensor is the ideal solution for measuring the water level in dams, ponds, rivers, reservoirs, etc.

Radar water level sensor is Non-contact water level sensor, for long term surface water measurements. SIRD-908 Radar Water Level Sensor adopts a transmitting frequency up to 26GHZ. The antenna is made of corrosion-resistant materials such as stainless steel and PTFE. It is suitable for measuring the height of the liquid level of rivers, lakes, reservoirs, and groundwater media. The maximum distance can reach 30 meters. Output 4- 20mA or RS485 signal.

Features of SIRD-908 Radar Water Level Sensor

• All-weather work. 26GHz microwave reflection principle, strong anti-interference ability.
• The sensor has a reliable accuracy of 3 mm.
• No mechanical wear, non-contact measurement. Long life and easy maintenance
• The measurement has nothing to do with water quality. It is not affected by floating objects such as floating ice
• No need for wave wells. No effect on water flow
• Unattended continuous online collection
• Ultra-low power consumption. Support solar power supply
• It can be used for wireless network transmission. No need to excavate cable trench. It has no impact on the construction of channel lining and tree planting.
• Low cost. Simple installation and maintenance. Long life.

Specifications of SIRD-908 Radar Water Level Sensor

Radar Water Level Sensor working principle

Measuring principle:

Micro-power microwave pulses are emitted from the radar antenna and travel through space at the speed of light. It is reflected by the object to be measured and received by the radar.

The time difference between the transmission and reception of the pulse signal is proportional to the distance from the radar antenna to the measured object. The propagation speed of electromagnetic signals in space is the speed of light. Usually when measuring the distance, the time difference between the transmitted pulse and the received pulse is very short and only on the order of nanoseconds.

Conventional technology is difficult to accurately measure this time.

SIRD-908 Radar Water Level Sensor uses an advanced equivalent sampling method to accurately measure the original nanosecond time interval. So as to realize the accurate measurement of distance.

Transmit-reflect-receive:

The extremely tiny 26GHz radar signal is emitted in the form of short pulses from the antenna end of the radar level gauge.
The radar pulse is reflected by the sensor environment and the surface of the object and received by the antenna as a radar echo.
The rotation period of the radar pulse from emission to reception is proportional to the distance, that is, the level.

◆ Input
The antenna receives the reflected microwave pulse and transmits it to the electronic circuit. The microprocessor processes this signal. Identify the echo generated by the microwave pulse on the surface of the material.
The correct echo signal identification is completed by intelligent software, and the accuracy can reach millimeter level. The distance D from the surface of the material is proportional to the time travel T of the pulse:
D=C×T/2
Where C is the distance of the empty tank at the speed of light E is known, then the distance of the level L is: L=E-D

◆ Output
It is set by entering the empty tank height E (=zero point), the full tank height F (=full scale) and some application parameters. Application parameters will automatically adapt the meter to the measurement environment. Corresponds to 4-20mA output.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

Radar Water Level Sensor Applications

• River water level, automatic monitoring of open channel water level, water resource monitoring and water level measurement;
• In front of the reservoir dam, the tail water level monitoring and surge tower (well) water level monitoring below the dam;
• Automatic tide level monitoring system, urban water supply and sewage level monitoring system;
• Mountain flood warning system water level monitoring, water level monitoring of small and medium rivers.

Extended reading: Capacitive water level sensor

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

More Water Level Sensors

Sino-Inst offers a variety of water level sensors for a wide range of conditions. Our sensors are ideally suited for monitoring water levels in streams, dams and reservoirs. Our water level sensor products include:

• Submersible Pressure Transducers
• Radar Level Sensors
• Magnetostrictive Level Sensors
• Pressure Transducers
• Ultrasonic water level sensor

Related Blogs

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

A wide variety of Radar Water Level Sensor for level measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Radar Water Level Sensor instrumentation, located in China.

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

Sanitary Level Sensor is a radar level measuring instrument. The preferred level sensor for level measurement requiring Hygienic requirements.

Sanitary Level Sensor is a radar level measuring instrument. The liquid level is measured using the principle of the time difference between the occurrence and reception of the radar wave. It is non-contact, hygienic, high-precision, not affected by pressure, and can meet most measurement needs. It is suitable for liquid level measurement with sanitary requirements such as food and pharmaceuticals. The product has a display, optional explosion-proof, and a maximum range of 25 meters can be set.

Features of SIRD-906 Radar Sanitary Level Sensor

1) Requirements for non-toxic and harmlessness of radar level gauge materials: different grades of stainless steel materials (304L, 316L, 410, 409, 329) are selected according to different conditions.

The selected polymer materials, various rubber elastomer materials, adhesives, lubricants, measuring conductive fluid materials, thermal insulation materials, outer plating materials, etc. must not contain toxic and harmful components, and must not have toxic and harmful components seep or infiltrate Wait.

2) The structure of the radar level gauge: the surface is smooth and clean (the surface polishing is preferably less than 0.8um), and there is no dead angle. It is not easy to accumulate residue, pollution and easy to wash.

3) Radar level meter certification: sanitary instruments usually need to obtain 3A sanitary certification. Or can obtain a third-party sanitation test report to meet GMP/FDA requirements.

Specifications of SIRD-906 Radar Sanitary Level Sensor

Ultrasonic vs Radar Level Sensor

There are three main differences between Ultrasonic and Radar Level Sensor:

Difference 1. The measurement range is different

Ultrasonic liquid level du measuring range: 0-50 meters;

The radar level gauge can measure all media with a dielectric constant> 1.2 in a vacuum, and the measurement range can reach 70 meters.

Difference 2: Different emission materials

The ultrasonic level gauge emits sound waves from the sensor (transducer), which is reflected by the liquid surface and then received by the same sensor or ultrasonic receiver;

Very short microwave pulses with very low energy emitted by the radar level gauge are transmitted and received through the antenna system, and the radar waves move at the speed of light.

Difference 3: Different measuring substances

Ultrasonic level gauges are widely used to measure the height of various liquids and solid materials. Water and sewage treatment. Pump house, collection well, biochemical reaction tank, sedimentation tank, etc. Electric power, mines: mortar pool, coal slurry pool, water treatment, etc.

The radar level gauge can measure liquid and solid media. For example: crude oil, slurry, raw coal, pulverized coal, volatile liquid, etc.

Extended reading: Sludge flow meter for sewage treatment return activated sludge system

Radar Water Level Sensor

Pulse radar level transmitters provide water level measurement based on directly measuring the running time of microwave pulses transmitted to and reflected from the surface of the river being measured. Using rs485 two-wire signal transmission, power supply and low power consumption are safe for outdoor use.

RS485 interface can be connected with 485 line, insert 4g sim card in dtu. 232 to usb to connect to the computer. Open the configuration tool and set the server address and port in the dtu configuration tool.

The server port monitors to receive the data, and it can be analyzed according to the sensor protocol. If the platform is developed to the modbus standard, the sensor also supports modbus. The whole analysis process will be simpler.

Realize remote monitoring and management of liquid level and water level outdoors. Both dtu and sensor industrial-grade outdoor design can be powered by solar energy. Therefore, radar water level gauges can be used in some of the most challenging water level applications.

Advantages:

• dtu rs485 bus access. Multi-device access, support rs232 interface;
• Strong compatibility. Can be connected to five-parameter water quality equipment. Multiple sensors use one gateway;
• Installed on the shore of the water area, on the measuring frame or “extension arm”. Adjust the mounting bracket according to the terrain;
• The installation is simple and the price is low. No need for expensive installation procedures;
• Low power consumption power supply enables the equipment to operate independently in the most remote areas;
• Non-contact measurement principle. Not damaged by silt accumulation or debris;
• Wireless transmission, avoid the trouble of pulling cables. Install and use, remotely unattended;
• High-level industrial requirements for the appearance of the iron shell. Application in hazardous areas and harsh environments;

Extended reading: Radar Level Meter for Corrosive Liquids

More Water Level Sensors

Sino-Inst offers a variety of water level sensors for a wide range of conditions. Our sensors are ideally suited for monitoring water levels in streams, dams and reservoirs. Our water level sensor products include:

• Submersible Pressure Transducers
• Radar Level Sensors
• Magnetostrictive Level Sensors
• Pressure Transducers
• Ultrasonic water level sensor

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

A wide variety of Radar level Sensors for level measurement 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

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

Horn Antenna Radar Tank Level Sensor is a common non-contact tank level meter. Suitable for high temperature sealed storage tank. Support customized high temperature 500-1000℃.

Horn Antenna Radar Tank Level Sensor has good focusing characteristics and can be applied to most tanks. If the corresponding cooling measures are adopted, the temperature of the measured medium can reach 500-1000℃. The maximum measuring distance is 35 meters. It can be used for level measurement of storage tanks, intermediate buffer tanks or process vessels. But it is not suitable for measurement of corrosive media. Output 4~20mA superimposed HART signal.

Features of SIRD-905 Horn Antenna Radar Tank Level Sensor

• Non-contact continuous liquid level measurement with larger range
• High-precision and precise transit time measurement brought by high-frequency pulse waves
• Sealed pressurized container will not affect performance
• Longer range than ultrasound
• If the corresponding cooling measures are adopted, the temperature of the measured medium can reach 1000°C.

Specifications of SIRD-905 Horn Antenna Radar Tank Level Sensor

Radar Tank Level Sensor Applications

• Power plants: coal piles, raw coal silos, fuel silos, reservoirs, waste gas purification tanks, silo pumps, ash storage, fuel tanks, etc.;
• Oilfield: crude oil or product oil storage tanks, three-phase separators, settling tanks, sewage tanks and oil-water interfaces, drilling mud tanks, etc.;
• Chemical industry: crude oil distillation tower, raw material and intermediate silo, reaction tank, ammonia tank, solid silo, separator, etc.;
• Metallurgy: ore silo, ore crusher, raw material silo, auxiliary silo, blast furnace, alumina powder silo, electrolytic cell buffer tank, etc.;
• Papermaking: raw material warehouse, storage tower, drying drum, chemical material storage warehouse, etc.;
• Cement: storage warehouse for stone, raw meal, cement, coal powder, slag, etc.;
• Water treatment: water storage, sewage, sedimentation, deep well, drinking water and other pools;
• Others: quarry, food, pharmaceutical, environmental protection, shipbuilding and other industries;

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

Radar Tank Level Sensor Installation Notes

(1) The horn of the horn-type intelligent radar level gauge must exceed the inner surface of the mounting hole by a certain interval (at least greater than 10mm).

(2) The axis of the antenna of the intelligent radar level gauge should be perpendicular to the reflective surface of the liquid level.

In addition, when performing routine maintenance on the intelligent radar level gauge, users can remotely observe the reflected wave curve with a PC (equipped with MAT software). For interference waves that may be newly generated later, the level gauge can be used to identify false waves. Remove the influence of these interference reflection waves to ensure correct measurement.

(3) Objects such as the stirring valve in the tank, the adhesion of the tank wall and the path. If it is within the signal range of the intelligent radar level gauge, it will produce interfering reflected waves and affect the level measurement. When installing, choose a suitable installation location to avoid interference from these factors.

Extended reading: Radar Level Meter for Corrosive Liquids

Radar Tank Level Sensor Installation Guide:

Be installed in the diameter of the 1/4 or 1/6.   

Note: The minimum distance from the tank wall should be 200mm.

Note:  ① datum

②The container center or axis of symmetry

The top conical tank level, can be installed at the top of the tank is intermediate, can guarantee the measurement to the conical bottom.  Extended Reading: Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

A feed antenna to the vertical alignment surface.  

If the surface is rough, stack angle must be used to adjust the angle of universal flange of  the antenna to the alignment surface.

 (Due to the solid surface tilt will cause the echo attenuation, even Loss of signal.)

Extended reading: guided wave radar level sensor advantages and disadvantages

Radar Level Sensor Working Principle

Radar level transmitter antenna microwave pulse is narrow, the downward transmission antenna.

Microwave exposure to the medium surface is reflected back again by the antenna system receives, sends the signal to the electronic circuit automatically converted into level signals.

Because the microwave propagation speed, electromagnetic wave to reach the target and the reflected back to the receiver this time is almost instantaneous.

A    Range set

B    Low adjustment

C    High

D    Blind area

Datum measurement:  Screw thread bottom or the sealing surface of the flange.

Note: Make sure the radar level meter the highest level cannot enter the measuring blind area (Figure D shown below).

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

Featured Tank Level Sensors

FAQ

Sino-Inst offers over 10 Horn Antenna Radar Tank 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 Sensor for level measurement 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

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

• Application：Solid material, Strong dust, easy to crystallize, condensation occasion
• Measuring Range：80 meters
• Process Connection：Thread, Universal Flange
• Process Temperature：-40℃~130℃(Standard type)；-40℃~250℃(High temperature type)
• Process Pressure：-0.1 ~ 0.3 MPa
• Measurement Accuracy： ±15mm
• Protection Grade：IP67
• Frequency Range： 26GHz

• Features
• Specifications
• Working principle
• Applications

Features of SIRD-904 Radar Level Gauge with Parabolic Antenna

Radar Level Gauge with Parabolic Antenna can produce narrow beam width and directivity. When there are many interferences in the tank wall, it can be measured well. It is not affected by false echoes of interferences such as steps.

The parabolic antenna is suitable for liquid and solid applications. Because of the largest diameter, the radar beam is the narrowest and can be used for extremely long measurement distances. The parabola is also the most insensitive antenna type to pollution.

It can be used in applications where antenna condensation is severe, such as asphalt and liquid sulfur.

SIRD-904 Radar Level Gauge with Parabolic Antenna uses a transmission frequency of up to 26GHz. It has:

• The beam angle is small (minimum 5 degrees). The energy is concentrated. It has stronger anti-interference ability. It greatly improves the measurement accuracy and reliability;
• The antenna size is small. It is easy to install and add dust cover and other antenna protection devices;
• The measurement blind area is smaller. Good results can also be obtained for small tank measurement;
• The wavelength is shorter. It is more suitable for the level measurement of small particles.
• It adopts advanced microprocessor and unique EchoDiscovery echo processing technology.
• It adopts pulse working mode. Radar level gauge has very low transmitting power. It can be installed in various metal and non-metal containers, and it has no harm to human body and the environment.

Specifications of SIRD-904 Radar Level Gauge

Application：	Solid materials, strong dust, easy to crystallize, and condensation
Measuring Range：	80 meters
Process Connection：	Thread, universal flange
Process  Temperature：	-40～130℃(standard type) / -40～250℃(high temperature type)
Process Pressure：	-0.1～0.3MPa
Accuracy：	±15mm
Protection Grade：	IP67
Frequency Range：	26GHz
Supply：	Two-wire system (DC24V) / Four-wire system (DC24V/AC220V)
Signal Output：	Exia ⅡC T6 Ga / Exd IIC T6 Gb
Outer Covering：	Aluminum Single Chamber / Aluminum Dual Chamber / Plastic / Stainless Steel Single Chamber
Explosion-proof Grade：	4…20mA/HART (two-wire/four-wire) / RS485 Mod bus
Antenna Material	stainless steel

Radar level gauge working principle

Radar level gauge antenna microwave pulse is narrow, the downward transmission antenna. Microwave exposure to the medium surface is reflected back again by the antenna system receives. Sends the signal to the electronic circuit automatically converted into level signals. Because the microwave propagation speed, electromagnetic wave to reach the target and the reflected back to the receiver this time is almost instantaneous.

Datum measurement:  Screw thread bottom or the sealing surface of the flange.

Note: Make sure the radar level meter the highest level cannot enter the measuring blind area (Figure D shown below).

• A    Range set
• B    Low adjustment
• C    High
• D    Blind area

Radar Level Gauge Applications

Radar liquid level can be divided according to the antenna form and can be divided into cone antenna, parabolic antenna, rod antenna.

The cone antenna is suitable for installation on the top of the tank or on the still pipe. Suitable for applications with a large measuring range.

The parabolic antenna is suitable for both liquid and solid measurement applications. Because it has the largest diameter, it has the narrowest radar beam.

The parabolic antenna is also the antenna type that is least sensitive to pollution. Which can be used for extremely long-distance measurement. It can be used in applications with harsh antenna bonding fluids such as asphalt and liquid sulfur.

The rod antenna is small in size, and only the PTFE material is exposed to the atmosphere of the storage tank. Rod antennas are suitable for measurement applications with sanitary requirements or corrosive chemical materials.

For the measurement-level high-precision radar level gauge, the frequency modulated continuous wave type is adopted. Except for fuel oil, asphalt, and other storage tanks with high viscosity and easy condensation. Which use parabolic antennas, other storage tanks use cone antennas.

The inner floating roof tank is designed with a waveguide to achieving accurate measurement of the liquid level of the storage tank. And set up a local indicator on the ground to display the liquid level value. It is convenient for on-site operators to inspect.

Extended reading: Radar Level Meter for Corrosive Liquids

Radar tank level gauge

Radar Tank Gauging System

Liquid level measurement system based on fieldbus of radar level gauge.

The radar level gauge provides 4-20mA output signal superimposed with HART, and also provides a digital field bus transmission method.

In the tank area measurement system, the tank area measurement signal is transmitted to the control system through the field bus of the radar level gauge.

The field bus can transmit multiple process parameters at the same time, which greatly simplifies the connection line and reduces the cost.

And at the same time of the transmission process, the identifier of the instrument and simple diagnostic information can also be transmitted together.

The field bus is bidirectional, so it is possible to calibrate, adjust and operate the field intelligent instrument in the control room. It can even predict the failure before it occurs.

Using the characteristics of data transmission based on the fieldbus of the radar level gauge, a level measurement system is constructed for the tank farm.

A radar level gauge is used for level measurement.
It communicates with the radar communication unit installed in the control room through the field bus.

Then the radar communication unit communicates with the control system through the RS-485 bus. While transmitting the liquid level of each storage tank, the temperature, pressure, density and other detection signals are accurately transmitted to the control system through the radar level gauge for concentration. Monitoring.

Realize the measurement of the entire tank area.

The fieldbus transmission mode of radar level gauge has the following advantages in project implementation:

1. The use of fieldbus network. It solves the problem of centralized detection of distributed oil storage tanks. It is convenient for networked management. It makes the system more practical, stable and reliable.
2. Digital transmission method. It can transmit multiple process variables at the same time. It greatly simplifies the signal connection line. It saves a lot of cables, protective sleeves, trough boxes, bridges and threading boxes and other corresponding auxiliary materials. It greatly reduces the cost .
3. The wiring is simple. If you need to add field instruments, you only need to connect to the original network in parallel. There is no need to lay it in the cabinet room. It saves cables and reduces investment. It also reduces the workload of design and installation.
4. Project implementation is more convenient. The project period is short. The workload is greatly reduced. The maintenance and installation costs are reduced.

Radar Level Gauge can also be used with paperless recorder.

What is radar level measurement?

Radar level measurement refers to the operation method of using radar as the core technology to measure the liquid level value.

Radar level measurement is a radar level gauge based on the principle of time domain reflection (TDR).
The electromagnetic pulse of the radar level gauge 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 radar level gauge is reflected to form an echo and returns to the pulse transmitter along the same path.

The distance between the transmitting device and the surface of the measured medium is proportional to the propagation time of the pulse between them. The height of the liquid level is calculated.

Extended reading: guided wave radar level sensor advantages and disadvantages

Radar level gauge price

Regarding the price of radar level gauge. Everyone must first know that the price of radar level gauges is generally high. At least under the same measurement parameters. Radar level gauges are more expensive than ultrasonic level transmitters.

However, the price of the radar level gauge is also telling the user its value. After all, you get what you pay for.

Of course. As a manufacturer of radar level gauges. Sino-Inst is committed to providing you with the best price radar level gauge.

Here, we provide you with a price list of radar level gauges. for reference only.

If you need to purchase radar level gauges, please contact our sales engineers to confirm the price.

Radar level gauge price list
Model	Unit price (USD/pc)	Medium
Radar level gauge	1038	Liquid, gas
Radar level gauge	1292	Liquid, solid
Radar level gauge	1292	Liquid, solid
Guided wave radar level gauge	923	Liquid, gas
High frequency radar level meter	1385	Liquid, solid
Guided wave radar level gauge	831	Liquid, solid
Anticorrosion radar level gauge	1038	Liquid, gas
Rod radar level gauge	923	Liquid, solid
Rod guided wave radar level gauge	831	Liquid, solid
Cable guided wave radar level gauge	831	Liquid, solid

Extended Reading: Influence of Dielectric Constant on Liquid Level Measurement | Radar-Guided Wave Radar Level Meter

What is the difference between ultrasonic and radar level transmitters?

Difference 1. The measuring range is different

Ultrasonic liquid level measurement range: 0-50 meters;

The radar level gauge can measure all media with a dielectric constant >1.2 in vacuum. The measuring range can reach 70 meters.

Difference 2: Different emission materials

The ultrasonic level gauge emits sound waves from the sensor (transducer). After being reflected by the liquid surface, it is received by the same sensor or ultrasonic receiver;

Very short microwave pulses with very low energy emitted by the radar level gauge are transmitted and received through the antenna system. Radar waves travel at the speed of light.

Parabolic antenna

The parabolic antenna is suitable for both liquid and solid applications. As it has the largest diameter it has the most narrow radar beam and can be used for extremely long measuring distances. The parabolic is also the antenna type most insensitive to contamination. It can be used in applications with severe antenna condensation like asphalt and liquid sulphur.

The Rosemount 5900S antennas have a drip-off design which for some versions also include inclined polished PTFE surfaces. Condensation on the antenna is minimized, and the radar signal remains strong. This results in maintenance free operation, high accuracy and reliability.

There is always a suitable antenna for every tank type, tank opening and application:

• Parabolic
• Horn
• Still-pipe array
• LPG/LNG

Information Sources: https://www.emerson.com/documents/automation/product-data-sheet-rosemount-5900s-radar-level-gauge-en-104522.pdf

SIRD-904 Radar Level Gauge with Parabolic Antenna is a cheap alternative to Rosemount 5900S. If you have any technical questions, please contact our sales engineers.

Radar Antenna Types, please refer to:

FAQ

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KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

Level sensor for solids is suitable for measuring the level of Dry Material (Bulk Solids and Powders). There are many kinds of meters that can automatically and continuously detect the material level. Such as electrode type, ultrasonic type, heavy hammer type, and so on. The radar level sensor stands out because of its high-precision performance. Radar level sensors can perform reliable level measurements of dust-containing particles, granules, powder, or aggregates in silos, silos, crushers, stockpiles, or transfer station applications. It is suitable for occasions with large changes in dust, temperature and pressure, and the presence of inert gas and steam.

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• Features
• Specifications
• Applications

Features of SIRD-903 Radar level Sensor for solid

• Non-contact measurement. No wear, no pollution
• Small antenna size, easy to install
• The wavelength is shorter. It has a better reflection on the inclined solid surface
• The measurement blind zone is smaller. Good results can also be obtained for small tank measurement
• The beam angle is small and the energy is concentrated. While enhancing the echo ability, it also helps avoid interference
• Almost unaffected by water vapor in the atmosphere, temperature, and pressure changes
• The instrument can also accurately read the true level echo in a severe dust environment
• High signal-to-noise ratio. Better performance can be obtained even under fluctuating conditions
• 26GHz frequency. It is the best choice for measuring solid and low dielectric constant media

Specifications of SIRD-903 26 GHz Radar level Sensor

Application：	Solid materials, strong dust, easy to crystallize, and condensation
Measuring Range：	70 meters
Process Connection：	Universal flange
Process  Temperature：	-40～130℃(standard type) / -40～250℃(high temperature type)
Process Pressure：	-0.1～4.0 MPa (flat flange) -0.1～0.3 MPa (universal flange)
Accuracy：	±15mm
Protection Grade：	IP67
Frequency Range：	26GHz
Supply：	Two-wire system (DC24V) / Four-wire system (DC24V/AC220V)
Signal Output：	Exia ⅡC T6 Ga / Exd IIC T6 Gb
Outer Covering：	Aluminum Single Chamber / Aluminum Dual Chamber / Plastic / Stainless Steel Single Chamber
Explosion-proof Grade：	4…20mA/HART (two-wire/four-wire) / RS485 Mod bus
Antenna Material	Stainless steel

Applications of Radar level Sensor for solids – Dust solid level measurement

Radar level sensors for solids can measure the maximum distance up to 70 meters. Compared with ordinary measuring instruments, the antenna of the Radar level sensor is further optimized and processed with a new type of fast microprocessor. Signal analysis and processing at a higher rate can be performed. The application range of Radar level sensors includes solid materials, process containers, or strong dust that are easy to crystallize and dew.

1. Granular materials

In cement plants, most of the raw materials are granular materials, and some are block materials. Such as limestone, raw coal, shale, etc., the semi-finished clinker is also a granular material. Stored in a warehouse or warehouse, there is an angle of repose of the material, but there is also a reflective interface.

According to the angle of repose and surface condition of the material formed by the feeding and unloading. After determining the effective range, it is recommended to use a non-contact Radar level sensor. That is a level gauge with a rod-shaped or horn-shaped antenna. The level gauge of the horn antenna has a stronger echo and higher accuracy (±0.2%～±1%F.S).

2. Powdery materials

There are generally 4 to 8 cement warehouses in cement plants or grinding stations. In addition, there are raw meal homogenization silo and fly ash silo, which is all powdered materials. Because the surface of the powder is extremely loose, microwave reflection is quite difficult. If the Radar level sensor is not used, it is very difficult to measure its level.

For powdery materials, a non-contact Radar level sensor with a horn antenna with a large flange can be used. It actually uses the cable as both an antenna and a still pipe, combining the two into one.

After the microwave pulse is emitted from the probe, it propagates along the cable. When the pulse meets the surface of the material, it will be reflected back, and its range can reach 35m. The dielectric constant ε of the tested material is at least 1.6. In addition, the cable’s wear resistance and the maximum endurable pull-down force. It can meet the testing requirements of various powder storages in cement plants.

At present, many cement plants have used the cable Radar level sensor to measure the material level of the homogenization silo, cement silo, and fly ash silo. Both have achieved good results.

Extended Reading: FMCW Radar for High Temperature Level Sensor

Solid level measurement techniques

Solid level measurement is a challenge for everyone. Because the bulk solids detected in the silo or storage tank are irregular physical forms.

Solid level measurement is a very difficult task. But knowing the amount of bulk solids in a silo, storage tank, or other container is an important variable in any process. Manufacturers can maximize efficiency, prevent overflow, exhaustion, or track volume or quality.

The use and selection of the Solid level measurement instrument are more complicated. Because the tested medium is an irregular physical form. SIRD-903 26 GHz Radar level Sensor is suitable for Dust solid level measurement. It is used in solid materials, strong dust, easy to crystallize, and condensation. Such as calcium carbonate powder level measurement.

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

Common level sensors for solids

The analysis of common level sensor for solids is as follows:

Extended reading: Radar Level Meter for Corrosive Liquids

Ultrasonic level sensor for solids

The ultrasonic pulse emitted by the ultrasonic transducer is transmitted to the surface of the object to be measured through the propagation of coal qualification. After reflection, it returns to the receiving transducer through the sound transmission medium.

Measure the time that the ultrasonic pulse propagates in the sound transmission medium from the transmission to the reception. Then according to the speed of sound in the sound transmission medium, the distance from the transducer to the object surface can be calculated. To determine the level.

Capacitive Level Sensor For Solid Level Measurement

Capacitance level detectors are also known as Capacitance level transmitters, are also referred to as radio frequency (RF) or admittance level sensors. They operate in the low MHz radiofrequency range, measuring admittance of an alternating current (ac) circuit that varies with level. Capacitance level sensors are a proven, as well as a cost-effective solution for level measurement, and point level detection in liquids and bulk solids. Various transmitters for continuous level measurement and switches, for point level detection are available. The measurement of the interface is also possible. The measuring principle is proven in millions of applications.

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

Featured level sensors for solids and liquids

FAQ

Extended reading: guided wave radar level sensor advantages and disadvantages

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

A wide variety of level sensor for solids level measurement 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

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

Radar Liquid Level Sensor is an instrument that measures the height of a liquid and converts it into an electrical signal. Using time-domain reflectometry (TDR) sensing technology, Radar Liquid Level Sensor emits and receives high-frequency radio waves (microwaves) to measure the distance to the surface of liquid-based substances. Different from the ultrasonic and guided wave radar transmitter. SIRD-902T Microwave Radar Liquid Level Sensor is a self-heating microwave level sensor. Low-temperature resistance, heat tracing type, non-icing, and anti-crystallization. Suitable for corrosive liquids, steam, and volatile liquids.

Get a Quote More Radar Level Sensors

• Features
• Specifications
• Application

Features of SIRD-902T Microwave Radar Liquid Level Sensor

• The level sensor can be heated. It is resistant to low temperature, self-heating, does not freeze, and prevents crystallization.
• Almost unaffected by corrosion and foam. Almost unaffected by atmospheric water vapor, temperature, and pressure changes.
• The severe dust environment has little effect on the work of the high-frequency level meter.
• The wavelength is shorter. It has a better reflection on the inclined solid surface.
• The beam angle is small, the energy is concentrated, and the echo ability is enhanced, but it is also beneficial to avoid interference.
• The measurement blind zone is smaller. Good results can also be obtained for small tank measurements.
• High signal-to-noise ratio. Better performance can be obtained even under fluctuating conditions.
• High frequency. It is a better choice for measuring solid and low dielectric constant medium.

Specifications of SIRD-902T Microwave Radar Liquid Level Sensor

Application：	Temperature, pressure, slightly corrosive liquid
Measuring Range：	20 meters
Process Connection：	Thread, flange
Process  Temperature：	-40～130℃(standard type) / -40～250℃(high temperature type)
Process Pressure：	-0.1～2.0MPa
Accuracy：	±3mm
Protection Grade：	IP67
Frequency Range：	26GHz
Supply：	Two-wire system (DC24V) / Four-wire system (DC24V/AC220V)
Signal Output：	Exia ⅡC T6 Ga / Exd IIC T6 Gb
Outer Covering：	Aluminum Single Chamber / Aluminum Dual Chamber / Plastic / Stainless Steel Single Chamber
Explosion-proof Grade：	4…20mA/HART (two-wire/four-wire) / RS485 Mod bus
Antenna Material	Stainless Steel  /  PTFE

Radar Level Sensor Application

The measurable conditions of the 902T Radar Liquid Level Sensor are as follows:

• Application: corrosive liquid, steam, volatile liquid
• Measuring range: 20 meters
• Process connection: flange
• Medium temperature: -40～130℃ (standard type)/ -40～230℃ (high temperature type)
• Process pressure: -0.1～2.0MPa

Read more about List of Radar Level Sensors

Radar Liquid Level Sensor Working Principle

The radar-level antenna emits narrow microwave pulses. Downward transmission via the antenna. After the microwave touches the surface of the measured medium, it is reflected back. It is received by the antenna system again and transmitted to the electronic circuit part to automatically convert it into a level signal.

Because microwaves travel so fast, the time it takes for electromagnetic waves to reach the target and return to the receiver by reflection is almost instantaneous.

A range setting
B Low adjustment
C high adjustment
D Blind zone range

The reference plane of the measurement is:
The bottom surface of the thread or the sealing surface of the flange

Note: When using radar level timing, make sure that the highest material level cannot enter the blind area of the measurement (the area shown in D in the figure).

Know more about Level measurement using radar technology

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.
• Foaming, splashing, vapor, and humidity can affect measurement performance.
• Top mounting only
• Minimal blocking distance limits operation when in proximity to liquid level
• Longer blocking distance than ultrasonic
• Radar passes through low dielectric constant fluids

Radar Level Sensor for Solids

Measuring medium: liquid and Solids
Measuring range: 0.1m~120m
Process connection: flange≥DN80
Process temperature: -40～200℃; -60~1200℃
Process pressure: -0.1～2.5MPa
Antenna size: 78mm lens antenna
Antenna material: PTFE/full filling

Measuring medium: solid
Measuring range: 0.3m~150m
Process connection: flange≥DN80
Process temperature: -40～110℃
Process pressure: -0.1～0.3MPa
Antenna size: 78mm lens antenna + purging (or without purging)
Antenna material: PTFE

Application: solid materials, strong dust, easy to crystallize, condensation occasions
Measuring range: 70 meters
Process connection: universal flange
Process temperature: -40～130℃ (standard type) / -40～250℃ (high temperature type)
Process pressure: -0.1～4.0 MPa (flat flange) -0.1～0.3 MPa (universal flange)
Accuracy: ±15mm
Protection level: IP67

Application: solid materials, strong dust, easy to crystallize, condensation occasions
Measuring range: 80 meters
Process connection: threaded, universal flange
Process temperature: -40～130℃ (standard type) / -40～250℃ (high temperature type)
Process pressure: -0.1～0.3MPa
Accuracy: ±15mm
Protection level: IP67

Application: solid particles, powder
Measuring range: liquid 35 meters / solid block 20 meters / solid powder 15 meters
Process connection: thread, flange
Process temperature: -40～130℃ (standard type) / -40～250℃ (high temperature type)
Process pressure: -0.1～4.0 MPa (flat flange) -0.1～0.3 MPa (universal flange)
Accuracy: ±15mm
Protection level: IP67

Applicable medium: solid particles or blocks, not suitable for solid powder
Application: Lime block measurement; raw coal measurement
Explosion-proof certification: Exia IIC T6 Ga/ Exd IIC T6 Gb
Measuring range: 35m
Antenna: Horn antenna
Frequency: 6 GHz
Process temperature: -40～130℃(standard type)/-40～250℃(high-temperature type)

Applicable medium: solid, especially medium measurement in a high-temperature environment
Application: Blast furnace level measurement
Explosion-proof certification: Exia IIC T6 Ga/Exd IIC T6 Gb
Measuring range: 15m
Antenna: Horn antenna
Frequency: 6 GHz
Process temperature: (-40～400)℃

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?

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: FMCW Radar for High Temperature Level Sensor

Ultrasonic Liquid Level Sensor

Ultrasonic liquid level sensors are non contact level measurement devices. In the measurement, the ultrasonic pulse is sent by the sensor (transducer). The sound wave is reflected by the liquid surface and received by the same sensor or ultrasonic receiver. It is converted into an electrical signal by a piezoelectric crystal or a magnetostrictive device. It is transmitted and received by the sound wave. The time between the sensor and the surface of the liquid being measured. Due to non-contact measurement, the measured medium is almost unlimited. It can be widely used for measuring the height of various liquid and solid materials. Like: water level, fuel level, oil level, petrol tank level, and so on.

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

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

Radar Level Sensor Price

The price of the radar level sensor is related to the medium, installation method, and pressure level.

1. The medium is divided into ordinary type and anti-corrosion type. The cost of the ordinary type is relatively low, and the price of the anti-corrosion type is relatively expensive.
2. The pressure levels are divided into 1.0MPA, 1.6MPA, 2.5MPA, 4.0MPA, 25MPA. The greater the pressure, the more expensive the price. So the pressure is directly proportional to the price.
3. Every customer who has bought a radar level sensor knows that the installation method is different. Top-mounted and side-mounted. Because of the different structure, the top-mounted type is more expensive than the side-mounted type.

Sino-Inst provides customers with the most reasonable prices on the basis of ensuring product quality. Radar Level Sensor Price reference range: USD500-1500.00/pc

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

Featured Radar Water Level Sensors

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

A wide variety of Microwave Radar Liquid Level Sensors 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

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

The working frequency band of Radar Tank Level Sensor is 24G~26GHZ. Radar Tank Level Sensor is a non-contact radar transmitter based on the principle of FM continuous wave.

SIRD-902 Drop antenna Radar Tank Level Sensor is an integral PTFE drop antenna type radar level sensor. It is used to measure the distance and level of strongly corrosive liquids, pastes and solid media. Compared with the radar level sensor that adopts the pulse measurement principle, it can measure stably, reliably and with high precision even in dusty, foamy, and highly corrosive applications. Compared with pulse radar or GWR, there are many features they don’t have.

Radar Antenna Types

1. Horn antenna for radar level gauge:
   26G high-frequency radar-type level measuring instrument. Output 4-20mA analog signal. The maximum measuring distance can reach 70 meters. This antenna has been further optimized. The new and fast microprocessor can perform higher-speed signal analysis and processing. The instrument can be used for particularly complex measurement conditions in reactors or solid silos.
2. Rod antenna for radar level gauge:
   Suitable for measuring liquids. Corrosive media. The maximum measuring distance can reach 20 meters. The antenna is further optimized. The new and fast microprocessor can perform higher rate signal analysis and processing. The instrument can be used for very complex measurement conditions in the reactor or solid silo.
3. Parabolic antenna for radar level gauge:
   This is a new type of antenna launched in China. It is mostly used in high-frequency transmitting radars. It is especially suitable for measuring targets and avoiding obstacles. 26G high frequency radar type level measuring instrument. Output 4~20mA analog signal. The maximum measuring distance can reach 70 meters. The antenna is further optimized. The new and fast microprocessor can perform higher rate signal analysis and processing. The instrument can be used for very complex measurement conditions in the reactor or solid silo.
4. Radar level gauge casing antenna:
   The casing has a focusing effect on radar waves. Therefore, when the dielectric constant is small or the liquid level produces continuous eddy currents or the device in the container causes false reflections, this type of instrument is suitable. But the measured medium is required to have good fluidity. It is not easy to hang the material.
5. Lens radar liquid level antenna:
   Transmits narrow microwave pulses and transmits downward through the antenna. The maximum measuring distance can reach 70 meters. The antenna is further optimized. The new and fast microprocessor can carry out higher-speed signal analysis and processing. The instrument can be used for some complex measurement conditions such as reactors and solid silos.

The above content is for your reference only. When choosing the antenna of the radar level gauge, you should choose according to the actual needs of the measurement environment.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

Radar Tank Level Sensor Working Principle

Frequency Modulated Continuous Wave Technology (FMCW)

The drop-type antenna emits radar waves, which are received by the antenna after being reflected on the surface of the medium. The radar principle used is Frequency Modulated Continuous Wave (FMCW). The frequency modulated continuous wave (FMCW) radar sends out a signal in the high-frequency band. Within its measurement range, the frequency of the radar wave increases linearly (called frequency sweep).

The transmission and reception of radar waves correspond to a time difference t. The distance d between the radar and the surface of the medium conforms to the formula t=2×d/c. Where c is the transmission speed of the radar wave above the surface of the medium, that is, the speed of light.

SIRD-902 Drop Antenna Radar Tank Level Sensor performs signal processing by comparing the frequency difference between the reflected wave and the current transmitted wave. The frequency difference △f is proportional to the distance, and the greater the frequency difference, the greater the distance.

After Fast Fourier Transform (FFT), the frequency difference Δf is converted into a frequency spectrum, and the distance d is calculated from this. The height of the level is calculated by the given tank height.

Extended reading: Radar Level Meter for Corrosive Liquids

Radar Level Sensor Advantages and Disadvantages

Advantages

• 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

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

Extended Reading: Dielectric constant for radar level transmitter

Radar Level Transmitter Calibration

Because the general test distance of radar level gauges is mostly 2-10m or more than 10m. It is difficult to simulate the distance required for calibration in the laboratory. Therefore, radar level gauges mostly use online calibration.

The online calibration of the radar level gauge utilizes the on-site process conditions. Through the change of the liquid level, the output value of the radar level gauge is compared with the actual gauge measurement value or other forms of liquid level measurement value.

According to the “Measurement and Verification Regulations for Level Gauges”, the radar level gauge is calibrated at multiple points or single points. Then it is debugged through the debugging software to make it meet the measurement accuracy requirements.

The conventional online calibration method of the radar level gauge can ensure that it is carried out in accordance with the requirements of the regulations. At the same time, the online calibration will calibrate the process interference and installation error factors at the same time. Therefore, the actual measurement accuracy of the radar level gauge is higher than that of the laboratory calibration.
However, on-line routine calibration must use on-site process conditions. During the calibration period, on-site process equipment-storage tanks or reaction tanks must be shut down, which seriously affects on-site process production.

At the same time, the on-site liquid level change is affected by the process conditions, and the stabilization time is too long. Therefore, the online routine calibration time is usually longer. Gauge measurement or other forms of liquid level measurement are also restricted by on-site safety and technical influences.

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

Radar Level Sensor for Solids

Radar Level Sensor is an advanced measuring instrument. It is suitable for solid materials, process containers or strong dusts that are easy to crystallize and dew. It has the advantages of low maintenance, high performance, high precision, high reliability and long service life. It can adapt to harsh production environments such as high temperature, high pressure, and steam.

For powdery materials, especially for the measurement of pneumatically conveyed powdery materials:

Although dust has no effect on radar in theory, a large amount of dust can also scatter and affect echo. Cable guided wave radar can be selected.

Because the microwave is transmitted in the steel cable, the dust generated during the transportation of the material has no effect on the measurement.

Cable guided wave radar can be used for the concentrate, quartz, and pulverized coal of the flash furnace, and the measurement effect is good.

For the measurement of granular or bulk materials:

The guided wave cable of the guided wave radar is easily damaged by hard materials. This problem is encountered in the level measurement of the limestone silo.

A high-frequency Radar Level Sensor must be selected. The smaller the emission angle of the microwave, the better. Because the higher the frequency of the microwave, the shorter the wavelength of the microwave. To ensure that the emitted radar wave can be reflected back to the radar to the greatest extent on the rough solid surface Probe. The smaller the emission angle, the smaller the probability of forming clutter and diffuse emission.

The high frequency Radar Level Sensor is adopted because of its small launch angle and good echo signal. Using continuous frequency modulation technology, the anti-interference ability is greatly improved. Solid and even pneumatically transmitted powders can also be accurately measured.

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

Radar Level Transmitter vs Ultrasonic

Radar level meter: Very short microwave pulses with very low transmit energy are transmitted and received through the antenna system. Radar waves travel at the speed of light. The running time can be converted into a level signal by electronic components. A special time extension method can ensure stable and accurate measurement in a very short time.

Ultrasonic liquid level meter: The high-frequency pulse sound wave emitted by the ultrasonic transducer (probe) meets the surface of the measured level (material). The reflected echo is received by the transducer and converted into an electrical signal.

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

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

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

From the difference between the above 2 points of liquid level meter, the following 2 application conclusions can be summarized:

1. Ultrasonic is mostly used for meteor measurement, and radar is mostly used for liquid level measurement;
2. In terms of energy, the emitted wave of radar is larger than that of ultrasonic waves. Electromagnetic waves have a stronger transmission distance and speed than mechanical waves. However, electromagnetic waves are susceptible to electromagnetic interference. Mechanical waves are easily attenuated by gaseous substances.
   So its application is to detect the place where the ultrasonic gas must be opened and the gas phase is relatively clean air. Compared with the radar, it can be resealed and used in a small amount of vapor phase volatilization. But this thing is ideal when the gas phase is in the atmosphere, otherwise the maintenance amount will be increased.

Extended reading: Industrial Tank level indicators and Tank Level Gauges

Pulse Radar Level Transmitter

Pulse Radar Level Transmitter is a transmitter that generates a 6.3 GHz pulse from the microprocessor control circuit and transmits it through the surface of the sensor.

Due to the strong penetrating power of the pulse radar, some foam, smoke, water vapor, etc. that usually interfere with the ultrasonic level gauge do not have any interference to the pulse radar level gauge.

Extended Reading: Types of Level Transmitters:

Guided Wave Radar Level Sensor

Guided Wave Radar Level Sensor for Liquid and Bulk Solids Contact level measurement.

Guided wave radar is a measuring instrument based on the principle of time travel. The radar wave runs at the speed of light. The operating time can be converted into level signals by electronic components. The probe emits high-frequency pulses and propagates along the cable or rod probe. When the pulse meets the surface of the material, it is reflected back and received by the receiver in the instrument. And convert the distance signal into level signal. SIRD-701 Guided Wave Radar Level Sensor is suitable for liquid and Bulk Solids measurement, and complex process conditions.

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

More Featured Radar Level Sensors

Level Senors for Tank Level Measurement

Tank level senor is a level sensor used to measure the tank level. The liquid level is the level of the liquid in a sealed container (such as a water tank) or an open container (water tank). The instrument that measures the liquid level is called a liquid level sensor, a liquid level gauge or a liquid level transmitter. The liquid level sensor is a kind of level instrument.

Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are commonly choices for tank level measurement. Liquid level sensors have been around for decades for leak detection or level measurement. Common measured mediums are: Water, Fuel, Diesel, Gasoline, diesel, liquefied gas, liquid ammonia, etc.

Read more about: 7 Level Senors for Tank Level Measurement

FAQ

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

A wide variety of Radar Tank Level Sensors 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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KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

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