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What Is a Coriolis Mass Flowmeter and How Does It Work?

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Coriolis Mass Flowmeter is The Gold Standard in Modern Flow Measurement.
In today’s fast-paced industries, accurate flow measurement is pivotal. It’s the cornerstone for a myriad of vital tasks, from perfecting recipe formulations to ensuring transparent billing operations. The Coriolis Mass Flowmeter emerges as a leading solution amidst this backdrop, known for its impeccable reliability and precision. As industry demands grow, understanding the role and significance of this innovative tool becomes essential for anyone in the sector.

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What Is a Coriolis Mass Flowmeter and How Does It Work

Featured Coriolis Mass Flowmeters

Z-Series Straight Tube Micro Motion Coriolis Flow Meter
T-series Triangle Coriolis Mass Flowmeter
U-Series Liquid Mass Flow Meter
V-series Curved Digital Mass Flow Meter

What is a Coriolis Mass Flowmeter?

The Coriolis mass flowmeter is an instrument that uses the principle of Coriolis force proportional to the mass flow generated by the fluid flowing in the vibrating tube to directly measure the mass flow.

There are two parallel flow tubes inside the sensor, with a driving coil in the middle and a detection coil at both ends. The detection coils installed at both ends of the vibrating tube will generate two sets of signals with different phases. The phase difference between the two signals is proportional to the mass flow rate of the fluid flowing through the sensor. The computer calculates the mass flow rate flowing through the vibrating tube.

When different media flow through the sensor, the main vibration frequency of the vibrating tube is different, and the density of the media is calculated accordingly. The platinum resistance installed on the vibration tube of the sensor can indirectly measure the temperature of the medium.

The Coriolis mass flowmeter has high measurement accuracy, and the measurement is not affected by the physical properties of the medium. There is no requirement for the length of the upstream and downstream straight pipe sections.

The Coriolis mass flowmeter can measure the density of the medium and indirectly measure the temperature of the medium.

Coriolis mass flowmeters are widely used in chemical, pharmaceutical, energy, rubber, paper, food and other industrial sectors.

History of Mass Flow Measurement

Long before the rise of our modern industries, people recognized the need to measure the flow of liquids and gases. In ancient civilizations, farmers would gauge the flow of water into their fields using simple channels and markings. As time progressed, so did our methods.

By the Industrial Revolution, the need for precise flow measurement became critical. Factories required exact amounts of steam, water, and other fluids to power machinery and produce goods. This pushed inventors to create more advanced tools.

Enter the 20th century, and we witnessed a breakthrough: the Coriolis Mass Flowmeter. Using the Coriolis Effect, it offered an accuracy and versatility unmatched by older methods. Today, it stands as a testament to our journey from basic channels to sophisticated devices, ensuring industries everywhere run efficiently and effectively.

The Coriolis Principle

G.G. Coriolis, a French engineer, noticed that objects moving on Earth’s surface shift sideways. This happens because the planet rotates eastward. In the Northern Hemisphere, the deflection is to the right of the motion; in the Southern Hemisphere, the deflection is to the left. This drift plays a principal role in both the tidal activity of the oceans and the weather of the planet. A point on the equator traces a bigger circle each day than a point near the poles. When an object moves towards a pole, it turns eastward because it maintains its faster speed as it moves across the Earth’s surface. This drift is defined as the Coriolis force.

When a fluid is flowing in a pipe and it is subjected to Coriolis acceleration through the mechanical introduction of apparent rotation into the pipe, the amount of deflecting force generated by the Coriolis inertial effect will be a function of the mass flow rate of the fluid. If a pipe is rotated around a point while liquid is flowing through it (toward or away from the center of rotation), that fluid will generate an inertial force (acting on the pipe) that will be at right angles to the direction of the flow.

With reference to the picture above, a particle (dm) travels at a velocity (V) inside a tube (T). The tube is rotating about a fixed point (P), and the particle is at a distance of one radius (R) from the fixed point.

The particle moves with angular velocity (w) under two components of acceleration, a centripetal acceleration directed toward P and a Coriolis acceleration acting at right angle to ar:

ar (centripetal) = w2r

at (Coriolis) = 2wv

In order to impart the Coriolis acceleration (at) to the fluid particle, a force of at (dm) has to be generated by the tube.
The fluid particle reacts to this force with an equal and opposite Coriolis force:

Fc = at(dm) = 2wv(dm)

Then, if the process fluid has density (D) and is flowing at constant speed inside a rotating tube of cross-sectional area A, a segment of the tube of length X will experience a Coriolis force of magnitude:

Fc = 2wvDAx

Because the mass flowrate is dm = DvA, the Coriolis force Fc = 2w(dm)x and, finally:

Mass Flow = Fc / (2wx)

This is how measurement of the Coriolis force exerted by the flowing fluid on the rotating tube can provide an indication of mass flowrate.
While rotating a tube is not necessarily practical standard operating procedure when building a commercial flow meter, oscillating or vibrating the tube – which is practical – can achieve the same effect.

How Does a Coriolis Flow Meter Work?

When a particle located in a tube that rotates with P as a fixed point (rotation center) moves toward or away from the rotation center, an inertial force will be generated. The principle is shown in the figure:

In the figure, the particle with mass δm moves to the right in the pipe at a constant speed υ. The pipe rotates around a fixed point P at an angular velocity ω. At this point the particle will acquire two acceleration components:

  1. The normal acceleration αr (centripetal acceleration), its magnitude is equal to ω2r, and its direction is towards point P.
  2. Tangential acceleration αt (Coriolis acceleration), its magnitude is equal to 2ωυ, and its direction is perpendicular to αr.

The force generated by tangential acceleration is called Coriolis force, and its magnitude is equal to Fc=2ωυδm.

In the figure fluid δm=ρA×ΔX,
So the Coriolis force can be expressed as:
ΔFc=2ωυ×δm=2ω×υ×ρ×A×ΔX=2ω×δqm×ΔX

where A is the cross-sectional area of the pipe
δqm=δdm/dt=υρA

For a specific rotating pipe, its frequency characteristic is certain. ΔFc only depends on δqm.

Mass flow can therefore be measured directly or indirectly by measuring the Coriolis force.

The Coriolis principle mass flowmeter works according to the above principle.

The actual flow sensor does not achieve rotational motion, but pipe vibration instead.
Its principle diagram is shown in the figure below.

The two ends of a curved pipe are fixed, and a vibration force (according to the resonant frequency of the pipe) is applied to the pipe at the middle position of the two fixed points. Make it vibrate at its natural frequency ω about the fixed point as the axis.

When there is no fluid flow in the pipeline, the pipeline is only affected by the external vibration force. The two half-sections of the pipeline vibrate in the same direction and there is no phase difference.

When there is fluid flow, it is affected by the Coriolis force Fc of the medium particle flowing in the pipeline (the Coriolis forces F1 and F2 in the two half sections of the pipeline are equal in size and opposite in direction). The two halves of the pipe twist in opposite directions, creating a phase difference. This phase difference is proportional to the mass flow rate.

The design of the sensor is to convert the measurement of the Coriolis force into the measurement of the phase time difference on both sides of the vibrating tube, which is the working principle of the Coriolis mass flowmeter.

Coriolis Mass Flowmeter Tube Designs

Early designs of Coriolis mass flow meters were constructed to feed the flowing fluid through a pipe into a rotating system. The mass flow is measured by a torque sensor installed on the shaft. This flowmeter has only been trial-produced in the laboratory.

In a commercial product design, it is impractical to generate the Coriolis force through the rotation of the measurement system. Therefore, the method of vibrating the measuring tube is used instead of the rotary motion. In this way, the effect of the Coriolis force on the measuring tube is also realized, and the measuring tube is displaced under the action of the Coriolis force.

Since the two ends of the measuring tube are fixed, the force acting on each point on the measuring tube is different, and the resulting displacements are also different. An additional twist is thus formed on the measuring tube. By measuring the phase difference at different points in this twisting process, the mass flow rate of the fluid flowing through the measuring tube can be obtained.

Our common forms of measuring tubes are as follows:

  • S-shaped measuring tube,
  • U-shaped measuring tube,
  • Double J-shaped measuring tube,
  • B-shaped measuring tube,
  • Single straight tube measuring tube,
  • Double straight measuring tube,
  • Ω-shaped measuring tube,
  • Double ring measuring tube, etc.;

Below we give a brief introduction to their structures.

As shown in the figure, the measurement system of the S-shaped measuring tube mass flowmeter consists of two parallel S-shaped measuring tubes, a driver and a sensor. The two ends of the tube are fixed, and the center of the tube is equipped with a driver to make the tube vibrate.

Sensors are installed at the symmetrical positions of the measuring tubes. The relative displacement between the vibrating tubes is measured at these two points. The mass flow is proportional to the phase difference of the oscillation frequencies measured at these two points.

The U-shaped tube has two structures of single and double measuring tubes.

The electromagnetic drive system drives the U-shaped measuring tube to vibrate at a fixed frequency. When the fluid is forced to accept the vertical movement of the tube, the tube moves upward during the first half of the vibration cycle, and the fluid in the measuring tube generates a downward pressure force before the driving point, which hinders the upward movement of the tube. An upward force is generated after the actuation point, accelerating the upward movement of the tube. The combination of these two forces twists the measuring tube. During the other half cycle of the vibration, the direction of the twist is reversed.

The degree of distortion of the measuring tube is directly proportional to the mass flow rate of the fluid flowing through the measuring tube. Install electromagnetic inductors on the measuring tubes on both sides of the driving point. To measure the phase difference of its movement, this phase difference is directly proportional to the mass flow through it.

In the double U-shaped measuring tube structure, the two measuring tubes vibrate in opposite directions. Make the measuring tube twisted out of phase by 180 degrees. as the picture shows. Compared with the single-measurement tube type, the detection signal of the double-tube type is amplified, and the flow capacity is also improved.

The two J-shaped pipes are centered on the pipe and distributed symmetrically. A driver mounted on the J-shaped section causes the tube to vibrate at a certain fixed frequency.

When the fluid in the measuring tube flows at a certain speed, the fluid in the measuring tube produces a Coriolis force effect due to the existence of vibration. This Coriolis force acts on the measuring tube, but the direction of the Coriolis force generated on the upper and lower tubes is different. The straight pipe part of the pipe produces different additional motion, that is, produces a phase difference of relative displacement.

In a double J-tube measurement system, the two tubes vibrate in opposite directions at the same time. The phase difference of the relative displacement between the upper and lower two straight pipes is increased. When the fluid is not flowing, the phase difference of the displacement signals measured by the sensors A and B is zero.

When the fluid in the measuring tube flows, the influence of the reaction force generated by the Coriolis force on the measuring tube in a certain direction that drives its vibration. When the pipe 1 separates and the pipe 2 approaches, the upper part of the pipe 1 moves faster and the lower part slows down, while the upper part of the pipe 2 speeds up and the lower part slows down in the opposite direction. As a result, there is a phase difference between the signals measured by the upper and lower mounted sensors. The magnitude of this signal directly reflects mass flow.

B-tube The Coriolis Mass Flowmeter flow measurement system consists of two B-tubes parallel to each other. The measured fluid is evenly sent into two B-shaped measuring tubes through the flow divider. The drive unit is mounted centrally between the two tubes. The measuring tube is driven to vibrate at a stable harmonic frequency. During the outward movement of the measuring tube, the straight tube parts are pushed away from each other. Under the action of the driver, the loops L1′ and L1” are close to each other, and the loops L2′ and L2” are also close to each other. Since each loop is fixed at one end to the meter body, rotational motion is restrained at the end regions and thus concentrated near the nodes.

However, the fluid in the circuit slows down when the circuits L1 ′ and L1 ″ approach each other under the action of the Coriolis force. And the two loops at the other end L2′ and L2” approach each other and the speed increases.

The opposite happens when the measuring tube is moved inwards. The straight pipe sections approach each other under the action of the driving force, while the two loops on the two cross-sections move away from each other. The Coriolis force generated by the fluid in the pipeline is superimposed on this basic motion, which will speed up the separation speed of the two circuits of L1′ and L1”, and reduce the separation speed of the two circuits of L2′ and L2”.

By properly installing the sensor between the two circuits on the end face. These movements induced by the Coriolis force can be used to accurately determine the mass flow rate of fluids.

The measurement system of this single straight tube mass flowmeter consists of a straight tube with fixed ends (flanges) and a vibration driver on it.

When the fluid in the tube does not flow, the driver makes the tube vibrate, and the fluid in the tube does not generate Coriolis force. Points A and B are subjected to equal force and change at the same rate.

When the fluid in the measuring tube flows in the tube at the velocity V, it is affected by the vibration force at point C (the vibration force at this time is upward). When the fluid particle moves from point A to point C, it is accelerated, and the particle produces a reaction force F1, which slows down the upward movement of the pipe. And between point C and point B, the fluid particle is decelerated. Accelerates the upward motion of the pipe. As a result, these two opposing forces on either side of point C cause a deformation of the tube. The phase difference of this deformation is proportional to the mass flow rate of the fluid flowing through the measuring tube.

Compared with the single straight tube, the double straight tube shape can reduce the pressure loss and increase the signal of the sensor. The actual structure is shown in the figure. The driver is placed in the center, and the two photoelectric sensors are only symmetrical to the two sides of the center. The measuring tube is less affected by the axial force.

When the fluid is not flowing, the photoelectric sensor is subjected to the same phase of the displacement generated by the tube. Coriolis forces are generated when a fluid medium flows through two vibrating measuring tubes.

This force causes opposite displacements on either side of the vibration point of the measuring tube. The fluid medium in the measuring tube before the vibration point attenuates the vibration of the tube, that is, the displacement speed of the tube slows down. The fluid medium in the test tube after the vibration point strengthens the vibration, that is, the displacement speed of the tube is accelerated.

Through the photoelectric sensor, the phase difference between the two ends is measured. This phase difference is proportional to the mass flow in the measuring tube when the oscillation frequency is constant.

The structure of the Ω-shaped measuring tube Coriolis Mass Flowmeter is shown in the figure. The driver is placed in the middle of the straight pipe section. When the fluid in the pipe flows at a certain speed, the pipes are separated or approached due to the vibration of the driver.

As the tubes separate, Coriolis forces generated in the fluid ahead of the vibration point oppose the vibrating force, slowing the tubes down. After the vibration point, the Coriolis force generated by the fluid in the pipe is in the same direction as the vibration, which accelerates the movement speed of the pipe.

When the driver brings the tubes closer together, the opposite effect occurs. The phase difference of the two tube word movements can be measured by the sensors at A and B. From this, the mass flow rate of the fluid flowing through the measuring tube can be obtained.

The double annular measuring tube Coriolis Mass Flowmeter consists of a pair of parallel helical tubes with a short straight tube.

In the middle position D of the pipe is equipped with a driver. The two measuring tubes are subjected to periodic opposite vibrations. Two sensors are arranged at the two ends of the elliptical spiral tube, equidistant from the middle point D. Measure the relative velocity of motion between the pipes at these two points. The phase difference between these two relative speeds is proportional to the mass flow rate of the fluid flowing through the measuring tube.

When the fluid in the measuring tube does not flow, the deformation of the tube caused by the vibration force is the same on both sides of the middle point. At the two measuring points at the sensor, the phase difference of the measured vibration displacement is zero. When the fluid flows in the measuring tube, before the point of maximum amplitude, the fluid particle produces an effect opposite to the vibration direction due to the Coriolis force. force. After this point, however, a force acting in the same direction as the vibration is produced.

Since the force on the two measuring tubes at the same moment is equal in size and opposite in direction, it is reflected that the moving speed of the tubes at the measuring points at the two sensors is increased or decreased, and the phase difference between these two points can be measured to obtain a pass Measure the mass flow rate of the tube fluid.

More Featured Flow Meters and Flow Measurement Solutions

Remote Magnetic Sewage Flow Meter
Insertion Magnetic Flow Meter
Vortex Steam Flow Meter
Insertion Vortex Flow Meter
Turbine Sanitary flow meter
Low temperature Turbine Flowmeter-Liquid Nitrogen Flow Meter

Gear flow meter for Micro flow
Liquid Roots Meter

What Is a Doppler Flow Meter?

Doppler Flow Meter is a new type of non-contact ultrasonic flow meter. Installs completely outside the pipe, eliminating the need…

We, Sino-Inst, are the manufacturer of Coriolis Mass Flowmeters. Our Coriolis mass flow meter products directly and accurately measure the mass flow, density and temperature of fluids in closed pipes. The main types that are selling well are U series (U-shaped tube), T series (triangular shape), Z series (straight tube shape) and so on.

Universal measuring principle for liquids and gases
Multivariable measurement: Simultaneous measurement of mass flow, density, temperature and viscosity
High measurement accuracy: ±0.2% typ.; optional: ±0.1%
The measuring principle is completely independent of the physical properties of the fluid and the flow field
No front/rear straight pipe length requirements
Wide range of measurement range: 1:10,1:20

Our Coriolis Mass Flowmeter, from DN03~DN250. Widely exported and sold to various countries. If you need to measure mass flow, density, temperature and other parameters. Please feel free to contact our sales engineers!

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

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Melted salt tanks, also known as molten salt troughs, serve the primary purpose of storing high-temperature liquid molten salt. Within these systems, the tanks store heat energy to provide the necessary thermal energy for reactors or heat exchangers or store excess energy. Given the extreme temperature and conditions within these tanks, there’s a need for reliable level measurement technology.

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Melted salt, reaching temperatures of around 460°C, creates a complex tank environment, especially when mixed with steam. Most level transmitters fail to operate under these harsh conditions.

Challenges of Measuring Melted Salt Levels:

  • High Temperatures: Melted salt can reach up to 460°C, making it hard for standard devices to operate reliably.
  • Steam Interference: The presence of steam in the tank creates a complex environment, which can interfere with measurement signals.
  • Tank Conditions: The frequent temperature fluctuations and regular start-ups can affect the accuracy of level measurements.
  • Material Properties: The molten state of salt presents a challenge, different from measuring solid or regular liquid states.
  • Equipment Durability: Many devices aren’t built to withstand the extreme conditions inside a melted salt tank over extended periods.
  • Accuracy: Precise measurements are crucial, but many transmitters can’t maintain consistent accuracy under these conditions.
  • Safety Concerns: Due to the high temperatures and nature of melted salt, there’s a heightened need for safe measurement methods.
  • External Factors: Outside atmospheric conditions, like pressure and humidity, can also influence measurement reliability.

In such a demanding setting, it’s vital to have equipment specially designed to overcome these challenges, ensuring safe and accurate level measurements.

Sino-Inst’s Solution:

After extensive site inspections and numerous tests, Sino-Inst introduced a customized high-temperature radar level transmitter. This new device can measure liquid levels in temperatures from 300°C to over 1000°C, even in tough environments. It’s a big advancement in level measurement technology.

Working Conditions and Environment:

  • Ambient temperature range: -35℃ to 80℃
  • Relative humidity: ≤95%
  • Atmospheric pressure: 86～108KPa
  • Medium temperature: 400-595℃
  • Medium: Molten Salt

Performance Indicators:

  1. Measurement accuracy within the full range: <±0.1%, display resolution: ±1mm
  2. Protection level of the transmitter: IP67
  3. Response time under 200ms, tracking rapid changes in tank levels.
  4. Resistant to design pressure 1.5 times during a water pressure test.

Considering the environmental and working conditions of the solar molten salt tower-type thermal power molten salt tank, Sino-Inst selected the best products for precise, stable measurements. The 80G high-frequency high-temperature radar level gauge was chosen with specific features:

  • Enhanced with a cooling system and heat dissipator to ensure stable operation.
  • Equipped with a convex lens to prevent adhesion, ensuring measurement accuracy.
  • Radial measures that are narrow, facilitating easy installation and stability.

Key Advantages:

  1. Unaffected by atmospheric precipitation
  2. Measures boiling liquid levels
  3. Installation outside storage tanks
  4. Internal antenna with fluoroplastic lens heating protection
  5. Accurate level measurement not limited by internal temperatures
  6. Evaporation and dust don’t affect measurement
  7. Operates in ambient temperatures from -60°C to 70°C and process temperatures up to 1200°C
  8. Corrosive liquid level measurement without contact, ensuring stable measurements.

Technical Principle:

The radar level transmitter operates on the principle of time travel. It emits high-frequency pulses at the speed of light, which, upon striking the surface of the material, are reflected back and received by an internal receiver. This distance signal is then converted into a level signal.

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

Read more about: Radar Level Measurement: Measuring Principle

Applications:

  • Solid measurements including powders, granules, and plastic granules with a low dielectric constant.
  • Liquid measurements, including reactor levels, steam levels, foam product levels, and more.

More Featured Radar Level Meters

64-80GHz FMCW Level Radar

Radar Water Level Sensor 0.05m～35m ~70m~120m
SIRD-901 Radar Corrosive Liquid Chemical Level Sensor

SIRD-903 26 GHz Radar level Sensor -Dust solid level measurement

SIRD-805 Radar Slurry Tank Level Sensor
SIRD-806 Radar High Temperature Level Sensor
SIRD-703 GWR Bulk Solids & Powder Solid Level Sensor
SIRD-704 Coaxial Probe Guided Wave Radar Level Transmitter

More Level Measurement Solutions

If the temperature of the medium you happen to measure is relatively high, you cannot find a suitable liquid level gauge. Or you feel that the measurement accuracy of the liquid level gauge you are using is not accurate. Welcome to choose our high temperature radar level meter, you will be satisfied.

We Sino-Inst is the manufacturer of radar level meter. We offer over 30 Radar level transmitters for level measurement. About 50% of these are 80G Radar level meters.

Sino-Inst, with our vast experience as a manufacturer and supplier, is at the forefront of introducing innovative solutions for complex challenges.

For reliable and advanced high-temperature radar level transmitter solutions, choose Sino-Inst – Your trusted partner in precision and innovation. Contact us now for customized solutions!

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What Is Density Meter? and Types

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What Is Density Meter?

Density meters are instruments that measure the density of a sample liquid or gas. The density meter is also known as an online liquid density transmitter. It can also be called a densitometer, density sensor, density analyzer, or inline hydrometer.

The industrial density meter is used to monitor and control the concentration and density of liquids or gases in production. This instrument is reliable and easy to use. It generates a 4-20mA or RS485 signal. The signal can be calibrated and monitored remotely.

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Types of Density Meters

How to classify and select industrial density meters?

There are five different kinds of densitometers: tuning fork, Coriolis, differential pressure, radioisotopic, and ultrasonic. Here’s a brief introduction.

1. Tuning fork density meter

The sensor is designed according to the principle of vibration. This vibrating element resembles a two-toothed tuning fork. The fork is vibrated by a piezoelectric crystal located at the root of the tooth. The frequency of the vibration is detected by another piezoelectric crystal. Through phase shifting and amplification circuits. The fork is stabilized at the natural resonant frequency. The liquid flowing through the fork causes the vibration to change. This change in vibration alters the resonant frequency. The electronic processing unit calculates the accurate density value.

Advantages:

Simple installation, plug and play, maintenance-free. The density of mixed media containing solids or air bubbles can be measured.

Disadvantages:

The density meter is not ideal for measuring crystallization and fouling media.

Typical application:

Petrochemical industry, food and wine industry, pharmaceutical industry, organic and inorganic chemical industry and mineral processing (such as clay, carbonate, silicate, etc.).

This is mainly used to detect interfaces in pipelines and control concentrations in various industries. This tool is used in brewing to measure wort concentration and in controlling acid-base concentrations. It is also used to refine sugar and detect the density of stirred mixtures. Reactor end point detection, separator interface detection, etc.

2. Coriolis online density meter

Working principle:

The measuring tube vibrates continuously at a certain resonant frequency. The vibration frequency changes with the density of the fluid. Therefore, the resonant frequency is a function of the fluid density. The density of the fluid can be accurately obtained by measuring the resonant frequency. The density measurement can also directly measure the fluid’s mass flow rate in the closed pipeline. This is done using the principle of Coriolis force.

Advantages:

The mass flowmeter can measure mass flow, density and temperature at the same time. Moreover, the measurement accuracy is high and the operation is stable. Therefore, it is widely used in the flow and density detection and control of the production process in the petrochemical field.

Disadvantages:

The price is relatively high, and it is easy to wear and block when used to measure granular media.

Typical application:

This device has many uses. In the petrochemical industry, it can detect oil levels and interfaces. In the food industry, it can be used for processing grape juice, tomato juice, and more. It also has applications in the dairy and paper industries. Additionally, it can test various chemical substances. It can also be used in mining brine, potash, natural gas, lubricating oil, biopharmaceutical and other industries.

3. Differential pressure density meter

Measuring principle:

The differential pressure density meter is the gravity difference △P=ρgh generated by the liquid column. When h remains constant, the differential pressure value measured by the transmitter is divided by gravity and length to find the density.

Advantages:

The differential pressure density meter is a simple, practical and cost-effective product.

Disadvantages:

This product has some drawbacks. It needs to be installed vertically, has a large margin of error, and the measurements it provides can be unstable.

Typical application:

The sugar industry and the winemaking industry both produce different types of liquids. These liquids include fruit juice, syrup, and grape juice. They also produce alcohol with different strengths, such as ethane and ethanol.

Dairy industry: condensed milk, lactose, cheese, dry cheese, lactic acid, etc.;

Mining: coal, potash, brine, phosphate, the compound, limestone, copper, etc.;

Oil refining: lubricating oil, fragrance, fuel oil, vegetable oil, etc.;

Food processing: tomato juice, fruit juice, vegetable oil, starch milk, jam, etc.;

Pulp and paper industry: black pulp, green pulp, pulp cleaning, evaporator, white pulp, caustic alkali, etc.;

Chemical industry: acid, caustic soda, carbamide, detergent, polymer density, ethylene glycol, sodium chloride, sodium hydroxide, etc.;

Petrochemical: natural gas, oil and gas washing, kerosene, lubricating oil, oil/water interface.

4. Radioactive isotope density meter

Working principle:

The instrument of the radioisotope density meter is equipped with a radioisotope radiation source. The radiation detector detects the radioactive radiation, like gamma rays. It receives the radiation after passing through the measured medium. When the thickness of the medium is constant, the attenuation of rays is only a function of the material density of the medium. The density value can be obtained through the calculation inside the meter.

Advantages:

The radioactive densitometer can measure the material’s density and other parameters inside the container. It doesn’t need to touch the object being detected. This is especially useful in harsh conditions like high temperature, high pressure, corrosion, and toxicity.

Disadvantages:

The pipeline’s inner wall gets worn and scaled, leading to measurement errors, difficult approvals, and strict management.

Typical application:

This device is commonly used in various industries like petrochemical, steel, and mining. It measures the density of liquids, solids, and substances like coal powder and cement slurry. This device is good for online use in industrial and mining companies. It is especially useful for measuring density in tough, hard, corrosive, hot, and high-pressure conditions.

5. Ultrasonic density (concentration) meter

Working principle:

Ultrasonic density (concentration) meter is based on the transmission speed of ultrasonic waves in liquid to measure the density of liquid.

Theory and experiments have shown that the speed of ultrasonic waves in a liquid depends on its concentration and temperature. Changing the concentration of the liquid will cause the speed of the waves to change as well.

The speed of ultrasonic waves in liquid depends on its elasticity and density. Therefore, changes in the transmission speed at a specific temperature indicate changes in concentration or density.

In this way, when the ultrasonic sensing unit of the meter gives an ultrasonic signal and measures its transmission speed in the process liquid and the current temperature of the liquid, the meter can accurately calculate the concentration, temperature, speed and other related data. The current concentration or density value.

Advantages:

Ultrasonic testing is not affected by the color, dirtiness, or flow of the medium.

Disadvantages:

The price of this product is relatively high, and the measurement is greatly affected by air bubbles. There are also limitations of its own circuit and environmental interference on the industrial site. The accuracy of this product needs to be improved.

Typical applications:

Industries such as chemical, petrochemical, textile, semiconductor, steel, food, beverage, pharmaceutical, winery, paper, and environmental protection. This sentence is quite long and complex, making it difficult to understand. Let’s break it down into shorter, simpler sentences while still conveying the same meaning and details.

The main purpose is to measure the concentration or density of different substances. These substances include acid-base salts, chemical raw materials, various oil products, fruit juice, syrup, beverages, and wort.

Also, it measures different wines, materials for making wine, things added to wine, oil products, changing how materials are moved, separating oil and water, and monitoring different material parts.

Featured Density Meters

Tuning Fork Density Meter

Online Density Meter – Differential Pressure Type
Portable Density Meter-Portable Tuning Fork Density Meter

Handheld Density Meter- Digital Density Meter for Petroleum Products
Optical Density Meter-Liquid Densitometer
Coriolis Density Meter-Concentration Meter
Online Alcohol Density Meter-Alcohol Concentration Meter
Split Type Density Meter for Liquids

How to Select the Right Density Meter?

How to choose the right density meter? Based on our Sino-Inst’s many years of experience in density measurement. We have sorted out the selection considerations for industrial density meters. Selecting the right density meter requires consideration of the following factors:

1. Measuring medium: What are you measuring? Liquids, gases, or both? Sludge, sediment? Make sure to choose a density meter that is compatible with your sample type.

2. Measuring range: Determine the density range of the substance you need to measure. Different densitometers have different measuring ranges. Make sure to choose an instrument that covers the range you need.

3. Measurement accuracy: Select a density meter according to your accuracy requirements for density measurement. Certain applications need very accurate density measurements, while others can tolerate less accuracy.

4. Use environment: Consider the environment in which you will use the density meter. If you need to measure in harsh conditions. Such as high temperature or high pressure environment, you need to choose a density meter that can work well under these conditions.

5. Functions and characteristics: Density meters may have different functions and characteristics. Choose the functions and features that suit you. Consider things like automatic temperature compensation and data logging and storage.

6. Budget: Finally, consider your budget constraints. Density meters come in a wide range of prices. Choose a cost-effective and reliable density meter according to your budget.

To choose a density meter, refer to the manufacturer’s product specifications and technical parameters. This can help you make more informed decisions and find the right density meter for your needs.

FAQ

Density meters help figure out how thick or thin a substance is. Industries like food, medicine, and fuel use them to make sure their products are top-notch and safe.

Think of a densimeter as a special scale. It checks how much space a sample takes up and uses that info to tell its density.

It’s often referred to as a “densimeter.” Both names mean the same thing and point to a tool that measures density.

In simple terms, the theory is about measuring how much a certain amount of substance weighs and then figuring out how tightly packed its particles are. This helps determine if the substance is dense (thick) or not dense (thin).

More Measurement and Analysis Solutions

What Is Zirconia Oxygen Sensor?

Welcome to the world of Zirconia Oxygen Sensors, a cornerstone of precision in process control and industrial efficiency. Oxygen plays…

Understanding density is key for many industries, from food and medicine to fuel. A good density meter, or density meter, helps ensure products are safe and high-quality.

Picking the right one might seem tricky, but with a bit of knowledge, it becomes easier. Remember, every tool has a purpose, and it’s about finding the best fit for your needs.

We, Sino-Inst is a professional density meter supplier. We produce and supply more than 10 kinds of density meters such as tuning fork density meters, differential pressure density meters, and hand-held density meters. Our density meters are exported to various countries, USA, UK, Spain, Ukraine, Nigeria, etc.

If you’re looking for expert guidance or a customized solution, remember we at Sino-Inst are seasoned manufacturers and suppliers here to help. Reach out to us and let’s make sure you get the perfect tool for your tasks!

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Ultrasonic Level Transmitter Installation Guide

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What points should be paid attention to for Ultrasonic level transmitter installation? Ultrasonic level transmitter is a widely used non-contact/non-invasive liquid level meter. Including wastewater storage tanks, fuel storage tanks, wastewater treatment pools, etc. Connect to the display table or various DCS systems through 4~20mA or RS485 (Modbus protocol or other customized protocols). Provide real-time liquid level data for industrial automation.
Let’s take a look at the Ultrasonic level transmitter installation requirements and what the installation principles are.

RFQ

Ultrasonic level transmitter working principle and frequency range

Ultrasonic level transmitter is a cost-effective liquid level measuring instrument. It is mainly composed of three parts: transducer, electronic module and housing. The transducer is one of the core components, and the working frequency of the transducer is one of the important parameters.

Ultrasonic pulses are emitted by sensors (transducers) during the measurement. The sound waves are reflected by the liquid surface and picked up by the same sensor. Converted into electrical signals by piezoelectric crystals. And the distance between the sensor and the surface of the liquid to be measured is calculated by the time between the emission and reception of the sound wave.

The selection of the operating frequency of the ultrasonic transducer is a very important parameter. It is not only directly related to the frequency characteristics and directional characteristics of the transducer. It also affects important performance indicators such as the transmitting power and transmitting efficiency of the transducer. In general, the working frequency of the ultrasonic level gauge is consistent with the working frequency of the ultrasonic transducer.

Working frequency is an important parameter of ultrasonic liquid level gauge. During the production of each ultrasonic sensor of Sino-Inst, the working frequency and impedance characteristics of the transducer are strictly measured and recorded to ensure product quality.

Featured Ultrasonic Level Transmitters

ULT-100A Ultrasonic Level Transducer
ULT-200 Ultrasonic Level Detector
ULT-100 Explosion-proof Ultrasonic Level Indicator
HS-2000 Ultrasonic Tank Level Sensor-External Mounted

Principles of Ultrasonic Level Transmitter installation

When you’re installing an Ultrasonic Level Transmitter, in addition to meeting the installation requirements, there are certain principles to consider:

  • The distance from the probe’s emission surface to the low liquid level should be less than the range of the purchased transmitter.
  • The distance from the probe’s emission surface to the high liquid level should be greater than the blind zone of the purchased transmitter.
  • The probe’s emission surface should remain parallel to the liquid surface.
  • The location of the probe’s installation should ideally avoid areas directly below inlets and outlets where the liquid surface experiences significant fluctuations.
  • If the pool or tank wall is not smooth, the transmitter’s installation location should be more than 0.3m away from the wall.
  • If the distance from the probe’s emission surface to the high liquid level is less than the blind zone of the purchased transmitter, an extension tube should be installed. The extension tube should have a diameter greater than 120mm, and a length between 0.35m and 0.50m. It should be installed vertically, have a smooth inner wall, and the opening in the tank should be larger than the extension tube’s inner diameter. Alternatively, the tube can extend to the bottom of the tank and should have a diameter greater than 80mm. Holes should be left at the bottom of the tube to keep the internal liquid level of the extension tube at the same height as inside the tank.

Basic Requirements for Ultrasonic Level Transmitter Installation

Before installing an ultrasonic level transmitter, make sure the instrument model meets the environmental requirements of the site, such as process pressure, process temperature, and chemical properties of the medium. This will ensure normal operation after installation.

Ultrasonic level transmitters have a certain emission angle when transmitting ultrasonic pulses. There should be no obstacles within the radiating area of the emitted ultrasonic beam from the lower edge of the ultrasonic transducer to the surface of the medium being measured. This requires avoiding internal facilities such as ladders, heating equipment, and limit switch brackets during installation.

Moreover, note the following when installing an integrated ultrasonic level transmitter:

  • Because of the sound beam angle, the ultrasonic beam should not intersect with the feed flow. Therefore, do not install the integrated ultrasonic level transmitter above the feed flow to ensure measurement of the medium surface and not the feed flow. Make sure the highest material level does not enter the measurement blind zone during installation.
  • The integrated ultrasonic level transmitter must maintain a certain distance from the tank wall.
  • The installation of the integrated ultrasonic level transmitter should aim to keep the transducer vertical to the liquid surface.
  • When installing the instrument outdoors, sunshade and rain protection measures should be adopted to avoid direct sunlight and reduce measurement errors caused by temperature changes.
  • The integrated ultrasonic level transmitter installed in hazardous areas must comply with national explosion-proof hazardous area installation regulations. In places where explosion-proof requirements are needed, the ultrasonic level transmitter must be grounded.

Other Requirements for Ultrasonic Level Transmitter Installation

  • Installation location: Keep the integrated ultrasonic level transmitter at least 200mm away from the tank wall. For a conical container with a flat tank top, install the instrument at the central position of the container top. This ensures measurement to the bottom of the container. For an arch-shaped tank, install it at 1/2 or 2/3 of the tank top radius. For trenches, take into account the load-bearing capacity of the bracket when installing. The probe emission angle should not exceed the A point boundary. The installation height must be within the range.
  • Moisture proofing: If the instrument is installed outdoors, in a humid indoor environment, or on the top of a refrigeration or heating tank, the environment is humid. Rainwater and condensation can flow down. To prevent moisture, before connecting the cable, please bend the cable and lead it downwards to prevent water or moisture from entering the instrument. Tighten the cable sealing sleeve.
  • Stirring effects: If there is stirring in the tank, the integrated ultrasonic level transmitter should be away from the stirrer to eliminate the false echo effect caused by the stirring blades. If foam is generated due to stirring or waves are turned up, use the guide wave tube installation method.
  • Foam effects: During feeding, stirring, or other treatments in the container, foam can form on the surface of some media, causing the ultrasonic level transmitter signal to attenuate. To avoid measurement errors caused by foam, install the sensor in the guide tube or use a guided wave radar level gauge. The guided wave radar level gauge is not affected by foam and is an ideal choice for this type of application.
  • Airflow effects: If there is a strong airflow or air vortex in the container, or it is installed outdoors and the wind is strong, install the sensor in the guide tube or use a guided wave radar level gauge.
Portable Ultrasonic Liquid Level Indicator
Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank
Ultrasonic Sludge Interface Meter /
Sludge Level Meter
Portable Ultrasonic Water Depth Gauge

Ultrasonic Level Transmitter Installation method:

In open environments, installation is generally achieved using a bracket, securing the device with the included locknut. Alternatively, you can drill a circular hole with a diameter of 60mm at the desired installation spot on the top of the tank or lid, and place the device in it. Then, tighten the locknut from underneath.

It is crucial to ensure that the face of the transmitter’s probe is parallel to the liquid surface being measured.

As illustrated, the probe of the device emits waves that reflect back upon hitting the liquid level. The probe calculates the time taken from emission to reception of these waves to determine the measured empty distance, H.

Subtracting the measured empty distance H from the installed height TH gives you the current liquid level, L. The transmitter’s range is the distance it can measure, and the installed height TH should be less than this range.

The device’s blind zone is the area near the probe that cannot be measured. The distance between the highest liquid level and the probe should be greater than the blind zone. For instance, if the blind zone is 0.5m, the distance between the highest liquid level and the probe must be more than 0.5m.

For example: If the range is 6 meters, the blind zone is 0.45 meters, the actual maximum measurable liquid level is between 0 to 5.5 meters. The emission of waves from the probe is a diffusion process, meaning it has a directional angle. Pay attention during installation to avoid hitting protrusions on the pool wall or the edge of the channel.

FAQ

To install an ultrasonic level transmitter, first, confirm the suitable spot for the device, either on a bracket or on the top of the tank or lid. Drill a hole if necessary. Place the device and secure it with the included locknut. Ensure the face of the transmitter’s probe is parallel to the liquid surface being measured.

Do not install the sensor where the emitted ultrasonic waves might hit obstacles like ladders, heating devices, or limit switch brackets within the tank.
Do not install the sensor where it might directly intersect with the inflow of material.
Avoid installing in a location where the sensor would be exposed to extreme weather conditions without adequate protection.

The ultrasonic sensor should be mounted in a location where its probe can be parallel to the liquid surface being measured. This is often at the top of the tank or the lid. Ensure that the sensor is at a safe distance from the walls of the container and away from any internal installations like ladders or heating devices.

Ultrasonic sensors can be mounted by placing them in the desired spot, either on a bracket or a drilled hole on the top of the tank or lid. Secure the sensor with the included locknut from underneath. Make sure the sensor’s probe is parallel to the liquid surface being measured for accurate readings.

More Level Measurement Solutions

Radar Liquid Level Sensors

Radar liquid level sensors are special tools that use radio waves to measure how much liquid is in a tank…

Ultrasonic Level Transmitter is a widely used level meter. When installing, pay attention to meet the installation requirements, including the environmental requirements of the site, avoiding the facilities in the tank, ensuring that the highest material level does not enter the measurement blind area, and the requirements of the installation location.

When installing an ultrasonic level gauge, installation principles must also be considered. The emitting surface of the probe should be kept parallel to the liquid surface, and the installation position of the probe should avoid the position where the liquid level fluctuates violently, etc.

Sino-Inst is a professional supplier of Ultrasonic Level Transmitter. Our Ultrasonic Level Transmitter is exported to various countries around the world. If you have any questions about Ultrasonic Level Transmitter Installation, please feel free to contact our Sino-Inst technical engineers.

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Liquid Level Sensor Probes Types and How to Select

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Liquid Level Sensor Probes are an essential part of liquid level transmitters. When purchasing a liquid level meter, we must consider the type of Liquid Level Sensor Probes, such as contact or non-contact. Such as the length of the probe, capacitive probe, float probe rod, etc. Or the working principle of Liquid Level Sensor Probes, such as ultrasonic, radar, hydrostatic pressure, etc. Selecting the right type is crucial, as it ensures accuracy, efficiency, and the reliability of the measurement. Whether in industries like food processing, oil and gas, or water treatment, the right sensor can optimize operations and minimize risks.

RFQ

What is Liquid Level Sensor Probe?

We can understand that a level meter is composed of a probe and a transmitter. Liquid Level Sensor Probes detect the amount of liquid in a specific space, like a tank or a bottle. They’re vital because they help monitor and control the amount of liquid, making sure there’s not too much or too little. This control keeps systems running smoothly and safely, saving both time and money.

For example, Capacitance sensing probe devices for measuring liquid level and converting it to an electrical signal to send to other instrumentation.

You may also have seen straight rod probes, cable probes, and coaxial probes. Or PTFE non-contact probe. Then, according to our many years of experience, Liquid Level Sensor Probes can be classified from several aspects. That is: working principle and material.

From the material point of view, it is easy to understand. It only needs to be compatible with the measured liquid. For example, to measure sulfuric acid, the probe is generally made of anti-corrosion material, such as PTFE. Therefore, when we select enough level meters, we only need to inform the manufacturer of the compatible materials of the measured medium.

Next, let’s look at different types of Liquid Level Sensor Probes from the working principle.

Types of Liquid Level Sensor Probes

Float Level Sensor Probes

Float Level Sensors are widely used in applications where accurate liquid level measurements are needed. Common scenarios include water tanks, where they help in maintaining the desired water level; fuel systems, to monitor fuel storage; sump pumps, to prevent flooding.

Their simplicity and reliability make them suitable for many liquid monitoring tasks.

Advantages:

  • Simple Design: Easy to install and use.
  • Cost-Effective: Suitable for budget-conscious applications.
  • Reliable: Performs well in various standard applications.
  • It can be made into a multi-float form. For multi-level control.

Disadvantages:

  • Limited Use: Not suitable for turbulent or dirty liquids.
  • Wear and Tear: Moving parts may require regular maintenance.

Capacitive Liquid Level Sensor Probes

Capacitive Liquid Level Sensor Probes work on the principle of detecting changes in electrical capacitance caused by the presence of a liquid. The sensor probe forms one plate of a capacitor, and the liquid acts as a dielectric material. Changes in the level of the liquid alter the capacitance, providing a measure of the liquid’s level.

Typical applications include the food and beverage industry, pharmaceuticals, and chemical processing, where non-contact, versatile liquid level sensing is needed, particularly with non-conductive or high-temperature fluids.

Advantages:

  • Works Well on Dielectric Fluids.
  • Simple Mechanical Construction: Easy to manufacture and install.
  • No Moving Parts: This reduces the need for regular inspection and maintenance, and minimizes wear and tear.
  • High-Temperature Fluid Compatibility: Since no sensitive components make contact with the fluid, it can handle high temperatures.
  • Performance Unaffected in Sealed or Pressurized Vessels: The design ensures stable functioning in different container types.

Disadvantages:

  • Incompatibility with Conductive Fluids: Requires an insulated outer tube for working with conductive liquids.
  • Issues with Thick or Sticky Media: Such substances can coat the probe, creating an insulation layer that causes malfunction or affects performance.
  • Requires Calibration: Proper setup is needed to distinguish between liquid and air.
  • Sensitive to Changes in Media: Changes in the dielectric constant of the fluid can affect readings.
  • Potential Obstruction and Cleanliness Issues: Probe protruding into the liquid might cause blockage, attract fouling, and create hygiene concerns.
SI-U01 Float Level Sensor

LT series Digital Display Magnetostrictive liquid level sensor

ULT-100 Explosion-proof Ultrasonic Level Indicator
HS-2000 Ultrasonic Tank Level Sensor-External Mounted

Ultrasonic Level Sensor Probes

Ultrasonic Level Sensor Probes function by emitting sound waves at ultrasonic frequencies. These waves bounce off the surface of the liquid and are detected by the sensor. By calculating the time taken for the sound waves to return, the distance to the liquid surface, and hence the level, is determined.

Ultrasonic sensors are commonly used in wastewater treatment, oil and gas industries, and irrigation systems, where non-contact measurement is preferred. Their capability to work with dirty or corrosive liquids makes them valuable in such applications.

Advantages:

  • Non-Contact Measurement: Suitable for corrosive or dirty liquids.
  • High Accuracy: Provides precise readings.
  • Versatile: Works well in various conditions. Such as explosion-proof.

Disadvantages:

  • Sensitive to Foam or Vapor: These factors may affect performance.
  • Measuring distance is limited. Ultrasonic is not suitable for larger measuring ranges.

Radar Level Sensor Probes

Radar Level Sensor Probes operate using radio waves. A radar pulse is transmitted, which reflects off the surface of the liquid and returns to the sensor. By measuring the time it takes for the pulse to travel to the liquid and back, the distance, and therefore the level, is calculated.

Radar sensors are highly accurate and can work in extreme conditions, making them suitable for the chemical industry, large industrial tanks, and marine applications. Their adaptability allows for usage with various liquids, even in challenging environments.

Advantages:

  • Highly Accurate: Offers very precise readings.
  • Extreme Conditions: Functions well in tough environments.
  • Versatile: Suitable for various liquids.

Disadvantages:

  • Complex Setup: May require professional installation.
  • More Expensive: Higher upfront cost.
  • Alignment Needed: Proper positioning is crucial.
SI-PCM260 Deep Well Water Level Sensor

Capacitance Level Transmitter
64-80GHz FMCW Level Radar

SIRD-901 Radar Corrosive Liquid Chemical Level Sensor

Magnetostrictive Level Sensor Probes

Magnetostrictive Level Sensor Probes operate by detecting changes in the magnetic alignment within a sensing element. A current pulse generates a magnetic field, interacting with a magnetic float, causing a torsional strain wave. The time taken for this wave to travel is measured, determining the liquid level.

Known for high precision and robust design, these sensors are typically used in petrochemical industries, pharmaceutical manufacturing, and cryogenic applications. Their ability to function in hazardous environments adds to their appeal in these specialized areas.

Advantages:

  • High Precision: Extremely accurate readings.
  • Robust Design: Suitable for hazardous environments.
  • Reliable: Functions well in various industrial settings.
  • Large range cable probes can be customized.

Disadvantages:

  • More Expensive: Higher cost may limit applications.
  • Magnetic Interference: Susceptible to external magnetic fields.

Hydrostatic Level Sensor Probes

Hydrostatic Level Sensor Probes work by measuring the pressure exerted by the liquid at a specific depth, which corresponds to the liquid’s level. The weight of the liquid creates pressure, which the sensor translates into a level reading.

These probes are often utilized in water treatment facilities, sewage systems, deep wells, and fuel tanks.

Their straightforward principle and reliability make them suitable for environments where liquid density is consistent, and there might be slurry or muddy substances, as they can handle such conditions effectively.

Advantages:

  • Simple and Reliable: Easy to use and offers dependable readings.
  • Works with Muddy Liquids: Suitable for slurry or muddy substances.
  • Low Maintenance: Requires minimal upkeep.

Disadvantages:

  • Pressure-Sensitive: Changes in pressure may affect performance.
  • Regular Cleaning Needed: Thick media may require consistent cleaning.
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

How to Select the Right Liquid Level Sensor Probe

Selecting the right Liquid Level Sensor Probe is essential for accurate and reliable measurements. Here’s a simple guide to help you choose the best option for your needs:

Understanding Your Needs:

  • Liquid Type: Identify if the liquid is conductive, non-conductive, sticky, or corrosive.
  • Measuring Range: Determine the maximum and minimum levels that need to be monitored.
  • Environmental Conditions: Consider factors like temperature, pressure, humidity, etc., that may affect the sensor.

Evaluating Different Types:

  • Material Requirements: Choose materials that are compatible with the liquid being measured, considering factors like corrosion resistance.
  • Installation Size: Check the dimensions of the sensor to make sure it fits within the available space.
  • Installation Space: Consider the physical layout of the area where the sensor will be installed.
  • Signal Output and Signal Control: Determine the type of output needed (analog, digital) and if any specific control features are required, like alarms.

Consideration for Installation and Maintenance:

  • Ease of Installation: Look for sensors that can be installed without specialized tools or expertise.
  • Maintenance Needs: Understand the cleaning and servicing needs, as some sensors might require more regular maintenance.

By taking these factors into consideration, you can find a Liquid Level Sensor Probe that meets your specific requirements and provides consistent, accurate performance. Remember to consult with experts or refer to detailed product specifications for the best results.

Client Case: Measuring Sulfuric Acid Tanks

We were approached by a customer looking to measure the liquid level in open concrete tanks containing bath acid sulfuric acid. The specific parameters provided were:

  • Measured Medium: Bath acid sulfuric acid
  • Tank Measurement Range: 2 meters
  • Temperature and Pressure: Ambient; maximum atmospheric temperature 30°C
  • Mounting Dimensions: 1 1/2″ NPT

After understanding the requirements, we configured the following solution for accurate and reliable measurements:

Radar Level Meters – 80G:

  • Application: Measuring the liquid level in sulfuric acid tanks
  • Antenna Material: PTFE, for excellent resistance to acid
  • Temperature Resistance: -40 to 80℃, suitable for ambient conditions
  • Pressure: -0.1 to 0.3MPa, aligning with atmospheric pressure
  • Mounting Dimensions: 1 1/2″ NPT PTFE Coated, matching customer’s specifications
  • Display: Digital, with measurement and programming capabilities
  • Power Supply: 24VDC
  • Output: 4-20mA (two wires) + HART
  • Electrical Connection: 1/2″ NPT head

This configuration met the customer’s specific needs for measuring sulfuric acid, providing a solution that is both reliable and tailored to their application. The client was satisfied with the performance, praising the gauge’s accuracy and ease of use.

FAQ

Make sure you have the answes to the following key questions before selecting a level meter, controller on any other level measurement instrument:

  1. Are you measuring a liquid or solid?
  2. What are the application’s temperature and pressure ranges?
  3. Is point level or continuous measurement required?
  4. What level measurement range do you need?
  5. Is the measured material electrically conductive?
  6. Will the material coat or build up on surfaces?
  7. Does turbulence, foam, or vapor occur at the surface of the liquid?
  8. Will you need contact or non-contact level measurement?
  9. What kind of output do you need–analog, relay, digital display, etc

Two common electronic probes used to measure liquid levels are capacitive and ultrasonic sensors. Capacitive sensors detect changes in electrical capacity caused by the liquid, while ultrasonic sensors use sound waves to determine the liquid’s surface distance.

A probe sensor for a water level indicator is a specific type of Liquid Level Sensor Probe that’s designed to measure water levels. It can be used in tanks, reservoirs, and other containers to monitor and control water levels, often in water treatment or irrigation systems.

The best sensor for measuring water levels depends on the specific needs and conditions, such as the type of water, temperature, pressure, and desired accuracy. Common choices include float-operated sensors for simplicity and ultrasonic sensors for non-contact measurements. Consulting with a professional or a sensor supplier can help determine the best option for a particular application.

More Liquid level measurement Guides

Selecting the right Liquid Level Sensor Probe is a critical task, and the various types mentioned offer unique advantages and considerations. Understanding your specific needs and working with an experienced manufacturer can ensure the best solution for your application.

At Sino-Inst, we pride ourselves on being not only an experienced manufacturer but a knowledgeable supplier as well. With years of expertise in the field, we provide tailored solutions to meet your unique needs, even offering customization to align perfectly with your requirements.

If you’re in need of a Liquid Level Sensor Probe, don’t hesitate to reach out to us. Our team is here to assist you in selecting the right product, ensuring efficiency, reliability, and satisfaction. Contact us today and let us be your trusted partner in your liquid level measurement needs.

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What Is the Ultrasonic CO2 Level Indicator? CO2 Bottle Level Measuring Device

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What Is the Ultrasonic CO2 Level Indicator?

Ultrasonic CO2 Level Indicator is the best CO2 Bottle Level Measuring Device. Our product Portable Ultrasonic Liquid Level Indicator can effectively detect the storage capacity of the fire extinguishing agent storage container in the gas fire extinguishing system (such as: Proto-Indo-European, halo-alkane, CO2, etc.).
Our Portable Ultrasonic Liquid Level Indicator uses non-contact detection technology and is ideal for detecting hazardous toxic or corrosive liquids. It can be used to measure whether there is liquid at a certain height in a container or pipeline.

RFQ

Portable Ultrasonic Level Indicator

Our Portable Ultrasonic Liquid Level Indicator for tank is designed to determine the presence or absence of the liquid at a certain height in a container or in pipeline. The liquid containers to be measured can be made of various kinds of materials such as metal, glass or un-foamed plastics.

Under ordinary conditions, the maximum wall thickness of measured containers is 30mm. The indicator can be used to detect various types of liquids (without crystallization or other particulate matter). Because of the innovative non-contact detection methods, this liquid level indicator is an ideal choice for the detecting dangerous toxic or corrosive liquids.

Features

  • No physical contact with medium
  • Suitable for toxic, corrosive, or invasive media
  • No need for drilling or welding on tank wall
  • Simple and convenient to operate and maintain
  • Ultrasonic adaptive detection algorithm.
  • High-contrast OLED color display, suitable for outdoor use under strong light
  • Intuitive user interface design
  • Comprehensive software displays measurements simply and clearly

Applicable CO2 Tanks/Cylinders/Bottles

CO2 Tank with any of the following diameter ranges:

210mm-230mm, 265mm-285mm, 340mm-360mm, 390mm-410mm

Common Tank: 

All tanks outside the above tank diameter ranges can be considered as common type.
vertical tank / horizontal tank / spherical tank(diameter <3M)
The indicator has no requirement towards medium, height and pressure.

Parameters

Measurement accuracy< 5mm
Measurable range of wall thickness3~30 mm
Measurable tank materialSteel, stainless steel, glass, unformed plastics
Measurable mediumPure liquid, milky liquid, suspension liquid
Ambient temperature-20℃〜60℃ (-4℉〜+140℉)
Ambient humidity15% ~ 85% RH
Power supplyTwo lithium batteries (supplied by customers)
Current100 mAh (on average)

Ultrasonic CO2 Level Indicator CO2 Tank Measurement

CO2 cylinder specifications (external diameter division):

The CO2 cylinders measured by this meter are divided into the following 4 specifications:

215mm-225mm diameter cylinders,
270mm-280mm diameter cylinders,
345mm-355mm diameter cylinders,
395mm-405mm diameter cylinders.

There are no excessive requirements for the height of the medium and the tank.

CO2 cylinder measurement operation:

  • Select “co2 cylinder”-“Choose a suitable cylinder diameter” through the menu and enter the measurement interface.
  • Hold the probe vertically and tightly on the tank, and press the button to measure.
  • Measurement results are based on measurement parameters and level indicator lights (red is “no liquid”, green is “with liquid”)
  • Generally, the measurement is started from the bottom of the storage tank (measurement with liquid position). If the measurement parameter is> = 2, the current level is considered to be a liquid-free position, and <2 is considered to be a liquid level; if it is floatingaround 2, It is considered that the liquid level of the horizontal plane is approaching the liquid surface (usually about 5 cm).
  • Take multiple points on the same horizontal plane for measurement, and take the result with the highest probability as the final result (avoid the interference of welds and unknown factors).
  • Find the liquid level position step by step through theapproximation measurement.

CO2 cylinder measurement Note:
Due to the irregular air outlet and a large number of welding kits at the top of the co2 cylinder, the measurement results at the bottom and top are invalid. (The top is generally empty in the case of a full tank).

Please refer to the video below to understand the operation tutorial and case of Ultrasonic CO2 Level Indicator.

In addition to Ultrasonic CO2 Level Indicator, we have more applications of ultrasonic technology.

More Ultrasonic Prodcuts

ULT-100 Explosion-proof Ultrasonic Level Indicator
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
Ultrasonic Sludge Interface Meter /
Sludge Level Meter
Portable Ultrasonic Water Depth Gauge
Handheld Ultrasonic Flow Meter
Ultrasonic Clamp on Flow Meter
Strap on flow meter X3
 Insertion Type Ultrasonic Flow Meter-Heat Meter–Mono/multi-Channel

Our Sino-inst Ultrasonic CO2 Level Indicator stands as a symbol of safety, precision, and efficiency in industrial applications. This superior device excels in assessing fire extinguishing systems, accurately measuring storage capacity with its non-contact det ection technology. It is versatile, handling various agents like Proto-Indo-European, halo-alkane, and CO2.

The safety advantages of this tool are unmatched, as it ensures no direct contact with toxic or corrosive liquids. Industries that prioritize safety, accuracy, and reliability find enormous value in our Ultrasonic CO2 Level Indicator. Whether for regular monitoring or spot checks, it provides dependable data, ensuring operations run smoothly and safely. Trust the Ultrasonic CO2 Level Indicator – it’s your partner in precision.

Our Ultrasonic CO2 Level Indicator is widely sold to various countries in the world. As an excellent and portable CO2 Bottle Level Measuring Device, it provides convenience for various industries such as fire protection. If you need, please feel free to contact Sino-Inst!

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Dew Point Monitor for the Fruit and Vegetable Industry

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Dew point monitors play a pivotal role in the thriving world of the fruit and vegetable industry. It can make the difference between a fresh, quality harvest and a subpar one. The dew point, a measure of atmospheric humidity, impacts everything from farming and storage to transport and retail.

Accurate monitoring of the dew point helps manage moisture levels, ensuring optimal growing conditions and preserving freshness during storage and transport. More importantly, it safeguards the quality that consumers demand and expect.

RFQ

What is Dew Point ?

Dew point is a term that might seem a bit scientific, but it’s quite simple once you break it down. Essentially, it’s the temperature at which the air becomes saturated with water vapor. When this happens, the vapor condenses into tiny drops of dew. You’ve probably noticed this phenomenon on cool mornings when you see droplets forming on the grass or on your car windows.

Why does the dew point matter, especially in the fruit and vegetable industry? Simply put, it’s all about controlling moisture. Just like us humans, fruits and vegetables are mostly water. So, they’re sensitive to the moisture in the air around them. If the air is too dry, they can shrivel and lose their freshness. But if it’s too humid, they can become overly moist and prone to rotting.

Advanced dew point monitors, like the ones our company provides, measure the air’s moisture content and temperature. They then use this information to calculate the dew point. With this data at your fingertips, you can ensure the best conditions for growing, storing, and transporting your fruits and vegetables.

Dew Point Meter 602 Series
Dew Point Transmitter 608 Series
Portable Dew Point Meter
Integrated Zirconia Oxygen Analyzer

Why Dew Point Monitoring is Essential for the Fruit and Vegetable Industry

Dew point monitoring holds a crucial role in the fruit and vegetable industry. It’s all about preserving that garden-fresh quality, from the field to the consumer’s table.

The dew point affects the quality of fruits and vegetables in several ways.

When the dew point is high, indicating a lot of moisture in the air, fruits and vegetables can absorb excess water. This might lead to faster spoilage and loss of firmness.

On the flip side, when the dew point is too low, the air is dry, which can cause fresh produce to lose moisture, shrivel up, and lose its appealing, fresh-picked look.

When it comes to storage and preservation, controlling the dew point is key. By monitoring the dew point, storage facilities can adjust humidity levels to prevent dehydration or over-saturation. This extends shelf life and maintains the appearance and nutritional value of the produce.

A prime example of dew point’s importance can be seen in apple storage. Apples are stored at low temperatures to extend their freshness. However, if the dew point isn’t carefully controlled, the cold environment could lead to condensation, a perfect breeding ground for molds and bacteria. By using dew point monitors, storage facilities can balance humidity, temperature, and dew point to prevent such issues and keep apples crisp and fresh for longer.

Through our dew point monitors, the fruit and vegetable industry can maintain this delicate balance and ensure the delivery of high-quality produce all year round.

Applications of Dew Point Monitors in the Fruit and Vegetable Industry:

Farming: Monitors provide real-time dew point data to help farmers optimize their irrigation schedules, preventing overwatering and under watering.

Transport: In climate-controlled vehicles, dew point monitors maintain optimal humidity levels, preventing produce from drying out or absorbing excess moisture during transport.

Storage: Monitors enable precise control of storage conditions, extending the freshness of produce, avoiding condensation, and preventing rot.

Benefits of Accurate Dew Point Monitoring:

Quality Assurance: Regular monitoring ensures the quality and longevity of produce from farm to table.

Efficiency: Minimizing spoilage and waste helps businesses run more efficiently.

Competitiveness: By delivering high-quality produce, businesses can gain a competitive edge in the market.

Sustainability: Efficient use of resources contributes to a more sustainable food system.

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Top 1 Guide to Dew Point Measurement

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In conclusion, dew point monitoring is essential for the fruit and vegetable industry. It’s a vital tool at every stage, from farming and transport to storage. By maintaining optimal moisture levels, dew point monitors help ensure the freshness, quality, and longevity of produce.

Our dew point sensors at Sino-Inst bring this crucial monitoring to your fingertips. They offer precision, user-friendly interfaces, and seamless integration into your existing systems. But what sets us apart is our rich experience as a manufacturer and supplier, our dedication to quality, and our commitment to our customers.
Reach out to us at Sino-Inst, and let our team guide you to the right dew point monitoring solution for your needs.

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Radar Level Gauge – Everything You Should Know and Selection List

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Radar level gauges are an essential part of many industrial operations, serving as the invisible sentinels that accurately measure the levels of various substances. These sophisticated devices use cutting-edge radar technology to make precise, non-contact measurements. Capable of working seamlessly under a variety of challenging conditions, radar level gauges offer undeniable benefits in accuracy, reliability, and versatility.

RFQ

Featured Radar Level Gauge Selection

Radar Level Gauge 11S
  • Measuring medium: Liquid
  • Measuring range: 0.1m~10m
  • Process connection: Thread G¾”A / ¾”NPT;Flange ≥DN25
  • Process temperature: -40～100℃
  • Process pressure: -0.1～1.6 MPa
  • Antenna size: 21mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±5mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:14°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 11
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m
  • Process connection: Thread G½”A /1 ½”NPT; Flange ≥DN40
  • Process temperature: -40～80℃/ -40～100℃
  • Process pressure: -0.1～0.3 MPa
  • Antenna size:32mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 8°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART protocol
Radar Level Gauge 12
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m
  • Process connection:Flange ≥DN40
  • Process temperature: -40～120℃
  • Process pressure: -0.1～1.6 MPa
  • Antenna size:32mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 8°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART protocol
Radar Level Gauge 13
  • Measuring medium: Liquid
  • Measuring range: 0.2m~30m/0.3~150m
  • Process connection:Flange ≥DN80 /Thread G3 A
  • Process temperature:
    • -40～150℃
    • -40-130℃( Athread)
  • Process pressure: -0.1～1.0 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 13S
  • Measuring medium: Liquid
  • Measuring range: 0.2m~30m/0.3~150m
  • Process connection:Flange ≥DN80 /gantry frame
  • Process temperature: -40～80℃
  • Process pressure: -0.1～0.3 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 13G
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m/0.3m~150m
  • Process connection:Flange ≥DN80
  • Process temperature: -40～280℃
  • Process pressure: -0.1～2.5 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PEEK
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  6°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 14
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m
  • Process connection:Flange ≥DN50
  • Process temperature: -40～200℃
  • Process pressure: -0.1～2.5 MPa
  • Antenna size:44mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  6°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 15
  • Measuring medium: Liquid
  • Measuring range: 0.3m~30m
  • Process connection:Flange ≥DN80
  • Process temperature: -40～200℃
  • Process pressure: -0.1～2.5 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 21
  • Measuring medium: Solid
  • Measuring range: 0.1m~30m/0.3~150m
  • Process connection:Flange ≥DN80
  • Process temperature: -40～150℃/-40～200℃
  • Process pressure: -0.1～0.3 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±5mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 21S
  • Measuring medium: Solid
  • Measuring range: 0.1m~30m/ 0.3m~150m
  • Process connection:Flange ≥DN80
  • Process temperature: -40～80℃
  • Process pressure: -0.1～0.3 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PE
  • Accuracy: ±5mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol

Radar Level Gauges Measurement Technology

The general principle of the FM continuous wave radar level gauge is that the radar emits electromagnetic waves on the top of the tank, and the electromagnetic waves are received by the radar after being reflected by the medium.

The frequency difference δf between the received signal and the transmitted signal is proportional to the distance R from the surface of the medium: R=C (speed)*δf (frequency difference)/2/K (frequency modulation slope).

Because the speed of light C and the frequency modulation slope K are known, the frequency difference δf can be estimated to obtain the distance R from the radar installation position to the material surface. And then through the known total height of the tank, subtract the spatial distance from the radar to the material surface (referred to as Empty height) to get the height of the material level.

Advantages of Using Radar Level Gauges

  1. Millimeter-wave radar, with a measurement accuracy of up to ±1mm, and a minimum blind area of 0.1m.
  2. The smaller antenna size satisfies the measurement of more working conditions.
  3. A variety of lens antennas, smaller launch angle, more concentrated energy, stronger echo signal, under the same industrial and mining conditions, compared to
    Other radar products have higher reliability.
  4. With stronger penetrability, it can be used normally even if there is adhesion and condensation.
  5. The dynamic signal range is larger, and the measurement of low dielectric constant medium is more stable.
  6. 6. A variety of measurement modes, the radar reaction time in the fast measurement mode is less than 1S.

Applications of Radar Level Gauges Across Industries

Radar Liquid Level Sensors

Radar liquid level sensors are special tools that use radio waves to measure how much liquid is in a tank…

Selection List

When choosing a radar level gauge, several factors need careful consideration to ensure that the gauge suits your specific requirements. Here’s a list to guide your selection process:

  • Nature of the Substance: The physical characteristics of the substance to be measured play a crucial role. Consider whether the substance is liquid or solid, its reflective properties, its density, and whether it is corrosive or otherwise hazardous.
  • Environmental Conditions: The conditions in which the gauge will operate can significantly affect its performance. Important conditions to consider include temperature, pressure, humidity, and the presence of dust or other particulates.
  • Installation Requirements: Gauge installation requirements, such as the size and shape of the tank or container, the presence of obstructions, and the available mounting options, can influence the choice of radar level gauge.
  • Range and Accuracy: Ensure the gauge has a measurement range that suits your needs. Also, consider the level of accuracy required for your operation.
  • Maintenance and Durability: Ideally, the gauge should require minimal maintenance and be durable enough to withstand your operating conditions for a reasonable period.
  • Cost: Finally, consider your budget. While higher-end models may offer advanced features and better performance, there might be cost-effective options that meet your requirements adequately.

Selecting the right radar sensor requires careful evaluation of your specific needs based on the sensor’s capabilities. Here we take the selection data of one of the radar level gauges FMW21/21s as an example.

 21/21s
ID：
License
P    Standard  (Non-explosion-proof)
I     Intrinsically safe（Exia IIC T6 Ga）
D    Flameproof（Ex db IIC T6 Gb）                                                                 
Process Connection / Material
1     Flange≥DN80              
X     Special customization
Antenna Type / Material
A  76mm Lens antenna / With purge port / PE
B  76mm Lens antenna / With purge port / PTFE
Sealing / process temperature
A    FKM/（-40-80℃）
B    FKM/（-40-150℃）
C    FKM/(-40-200℃)                              
Y     Special customization
he  Electronic Unit
1  （4~20）mA/HART protocol 24VDC   2-wire 
2  （4~20）mA/HART protocol 220VAC   4-wire   
3  （4~20）mA+RS485/Modbus protocol 12- 24VDC   6-wire                             
Shell material/protection grade
A   Cast aluminum / Single chamber / IP67
B   Cast aluminum / Double chamber / IP67
C   Cast aluminum / Double cavity side view / IP67
D   Plastic ABS / Single chamber / IP65
E   Stainless steel 304 / Single chamber / IP67
F    Stainless steel 304 / Double chamber / IP67
Cable Line
M   M20×l. 5
N    ½″ NPTX     Special customization  
Display programming
A    Programming with display
B    With display programming/ Bluetooth communication
C    Without          

Flange option / material

Specification / Code / MaterialPP UniversalPTFE UniversalStainless steel304 UniversalStainless steel316L Universal
DN80P4F4G4S4
DN100P5F5G5S5
DN125P6F6G6S6
DN150P7F7G7S7
DN200P8F8G8S8

More Featured Radar Level Meters

SIRD-901 Radar Corrosive Liquid Chemical Level Sensor
SIRD-902 Drop Antenna Radar Tank Level Sensor
SIRD-902T Microwave Radar Liquid Level Sensor
SIRD-903 26 GHz Radar level Sensor -Dust solid level measurement
SI-FMF12 Frequency Modulated Continuous Wave Radar Level Sensor

SI-FMF13 FMCW Radar Water Level Sensor
SI-FMF15 FMCW Radar High Temperature Level Sensor
SIRD-701 Guided Wave Radar Level Sensor

FAQ

A radar level gauge is an instrument used in various industries to measure the level of materials without making physical contact. It utilizes radar wave technology, emitting waves that bounce off the material surface and return to the gauge, enabling it to calculate the material’s level accurately.

Radar level measurement is known for its exceptional accuracy. While the exact degree of accuracy can vary depending on the specific model and operating conditions, most radar level gauges can achieve accuracy within a few millimeters.

There are mainly two types of radar level gauges: guided wave radar (GWR) and non-contact (or free-space) radar. GWR uses a probe to guide the radar waves to the material surface, while non-contact radar emits waves freely towards the material. Each type has its unique advantages and is suitable for different applications.

A radar level meter works by emitting radar waves towards the surface of the material being measured. These waves bounce back off the surface and are captured by the meter. By calculating the time it takes for the waves to travel to the surface and back, the meter can determine the level of the material accurately.

In conclusion, radar level gauges are a sophisticated and highly reliable tool for non-contact level measurement across diverse industries.

At Sino-Inst, we understand the vital role that accurate level measurement plays in your operations. We’re an experienced manufacturer and supplier of radar level gauges.

Whether you’re looking for standard options or require customized solutions to meet unique requirements, our team is ready to assist. We’re committed to delivering high-quality products that contribute to the efficiency and success of your business.

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What Is a Dew Point Monitor and How to Choose One?

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Dew point monitors are critical equipment in many industries. The dew point is the temperature at which the air humidity reaches saturation. A dew point monitor is the instrument that detects this temperature. Although dew point measurement is most often cited in weather forecasting, it is also an important factor in many industrial processes. Excessive moisture may impair product quality and performance as well as materials.

RFQ

What is a Dew Point Monitor?

Dew point monitors are vital pieces of equipment used to measure the temperature at which the air becomes saturated, causing water vapor to condense into liquid. This temperature is known as the dew point. By monitoring this, we gain essential information about the humidity in a certain environment.

Why is this important? In many industries, excess moisture can pose significant problems. For example, in compressed air systems, high humidity can lead to corrosion in the pipelines. In the electronics industry, too much moisture can damage sensitive components. Similarly, in climate-controlled environments like laboratories, an accurate reading of the dew point is crucial for maintaining ideal conditions.

In essence, a dew point monitor gives us a precise, reliable way to keep track of humidity levels. By doing so, it helps prevent potential issues caused by moisture, ensuring everything runs smoothly in various environments where humidity control is critical.

how a dew point monitor works?

A dew point monitor works by examining the air or gas in an environment to determine the temperature at which it would be fully saturated, or, in other words, the temperature at which dew would form. This process might sound complex, but let’s simplify it a bit.

Picture a cool glass on a hot day. After a while, you’ll see droplets form on the outside of the glass. That’s condensation, which happens when the air around the cold glass cools down to a point where it can’t hold all its moisture. That exact temperature is the dew point.

Dew point monitors utilize advanced sensors to mimic this process. They chill a surface within the device and measure the temperature at which condensation begins to form on that surface. This temperature is reported as the dew point.

These devices work by cooling a mirror within the unit until condensation forms on its surface. The temperature at which this occurs is accurately measured and reported as the dew point. Chilled mirror dew point monitors are known for their high precision and reliability, making them ideal for laboratories and other settings where precise measurements are crucial.

These monitors measure the dew point by observing changes in electrical capacitance caused by variations in moisture content. They offer a good balance of accuracy and cost-effectiveness, suitable for many industrial applications.

These monitors work by measuring the changes in electrical resistance caused by humidity changes. They are generally cost-effective and provide reasonably accurate readings, making them popular in a variety of applications.

In short, dew point monitors give us an accurate way to measure the moisture content in the air, helping various industries prevent potential issues and maintain optimal conditions.

Technical Benefits of Dew Point Monitors

  • Precision: Dew point monitors offer highly accurate measurements of humidity levels, which is critical for many industrial and commercial operations.
  • Reliability: These devices provide reliable, consistent readings over time, supporting effective long-term humidity management.
  • Versatility: With the ability to operate across a wide range of temperatures and humidity levels, dew point monitors are useful in numerous industries and settings.
  • Preventive Maintenance: Dew point monitors facilitate timely interventions to avoid issues caused by excessive humidity, such as corrosion or equipment damage, leading to reduced maintenance costs and prolonged equipment lifespan.
  • Product Quality Enhancement: By controlling dew point, these monitors can directly improve the quality of products in various manufacturing settings, from food packaging to electronics storage.
  • Energy Efficiency: Especially in systems like compressed air dryers, dew point monitors help to regulate energy usage, thereby enhancing efficiency and reducing operational costs.

So, when we consider these substantial technical benefits, it becomes clear that dew point monitors play a vital role in managing optimal environmental conditions across a range of applications.

Dew Point Meter 602 Series
Dew Point Transmitter 608 Series
Portable Dew Point Meter

different industrial applications

Monitoring dew point is crucial across a variety of industries due to its impact on processes, product quality, and energy efficiency. Dew point monitors play a central role in this endeavor. Let’s delve into a few specific industries and applications:

HVAC and Building Management: In this field, dew point monitoring helps maintain comfortable and healthy indoor air quality. It also prevents condensation on surfaces, which can lead to mold growth and structural damage.

Pharmaceuticals and Healthcare: In pharmaceutical manufacturing and storage, maintaining a precise humidity level is critical to product quality and safety. Dew point monitors aid in ensuring these stringent conditions are met consistently.

Food and Beverage Industry: Here, dew point monitoring helps prevent condensation on machinery and packaging. This reduces the risk of microbial growth, ensuring the hygienic handling and quality of food products.

Electronics Manufacturing: In the production and storage of electronic components, maintaining a low dew point prevents moisture-related damage and improves product lifespan and reliability.

Compressed Air Systems: Dew point monitors ensure that the air used in these systems is dry enough to prevent pipeline corrosion and blockages from ice or condensed water.

Petrochemicals and Natural Gas: For these industries, dew point monitoring is critical for process control and safety, as excess moisture can lead to pipeline corrosion and efficiency loss.

In conclusion, the role of dew point monitors extends far beyond simple humidity measurement. They provide an essential service to a variety of industries, ensuring product quality, process efficiency, and operational safety. The right dew point monitoring can indeed make a significant difference in your industry or application.

How to Choose a Dew Point Monitor

Choosing a dew point monitor can feel like a daunting task, but with the right approach, it can be made simpler. Here’s a step-by-step guide to help you make the right decision:

  1. Understand Your Needs: The first step is understanding your specific requirements. What range of temperatures and humidity levels do you need to monitor? What accuracy level is required? The answers to these questions will help you narrow down your options.
  2. Consider Your Industry Requirements: Different industries have different standards and requirements when it comes to dew point monitoring. Ensure that the monitor you choose meets or exceeds these industry-specific standards.
  3. Budget Constraints: Dew point monitors come at varying price points, depending on their features and technology. It’s essential to balance the need for quality and accuracy with your available budget.
  4. Evaluate Features: Look for features that make the monitor easier to use and more efficient. This could include easy-to-read displays, connectivity options for remote monitoring, self-calibration features, and more.
  5. Research Brands and Models: There are many dew point monitor brands and models on the market. Spend some time researching and comparing them. Look at customer reviews and ratings to get a sense of their reliability and performance.
  6. Consider After-sales Service and Support: Good after-sales service, including technical support and warranty, can be a lifesaver if you encounter issues with the monitor.

By following these steps, you can make an informed decision and choose a dew point monitor that meets your specific needs and industry requirements, while fitting within your budget. Remember, the right dew point monitor is not just a purchase – it’s an investment in quality control and efficient operations.

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In conclusion, dew point monitors are vital instruments in a variety of industries, from HVAC and building management to pharmaceuticals, food and beverage, and beyond.

Choosing the right dew point monitor is an investment that can yield significant returns in terms of improved process control, product quality, and operational efficiency.

Sino-Inst invite you to explore our range of dew point monitors. Each of our products has been carefully designed to provide accuracy, reliability, and ease of use in mind. If you have any questions or need more personalized advice, don’t hesitate to contact us. We’re here to help you make the right choice for your specific needs and requirements.

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What Are Flow elements? Guide for Different Types of Flow Elements

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What are flow elements? Simply put, a flow element is a device used to measure the rate at which a fluid (like water or gas) moves through a pipeline. Imagine a highway, and the flow element is the toll booth that monitors how many cars pass through. Only instead of cars, flow elements deal with the movement of fluid.

RFQ

Types of Flow Elements

Understanding flow elements can feel like an adventure, with each type having its own unique characteristics and applications. Let’s delve into nine different types of flow elements, each offering unique advantages and suited to various applications.

Pitot Tube

The Pitot Tube, named after the French engineer Henri Pitot, measures the velocity of fluid flow by comparing the fluid’s static pressure to its dynamic pressure. These devices are simple, cost-effective, and ideal for applications where minimizing pressure loss is crucial.

Annubar Flow Element

Annubar Flow Elements, also known as averaging pitot tubes, have a distinct multiport design. They provide an averaged differential pressure output that allows for a more accurate measurement of flow rates, particularly in larger pipes and ducts.

Target Flow Sensor

Target Flow Sensors work a little differently. A ‘target’ (essentially a disc) is placed in the fluid flow, and as the fluid hits this target, it creates a force. By measuring this force, we can calculate the flow rate. These sensors are robust and can measure flow in both directions, making them versatile options.

Venturi Tube

Venturi Tubes are designed for accuracy. They feature a distinct tube that first narrows, then widens. The fluid accelerates in the narrow section and decelerates in the wider section. This change in speed alters the pressure, which is used to calculate flow rate. If precision is your top priority, Venturi Tubes are worth considering.

Flow Nozzle

Flow Nozzles are the resilient heroes of the flow element world. Their durable design can handle high-speed flows and harsh conditions, like high temperatures in steam flows. If toughness is paramount, Flow Nozzles step up to the plate.

V Cone Flow Sensor

V Cone Flow Sensors are innovative devices that contain a cone inside the tube. As the fluid flows around the cone, it creates a differential pressure, which can be measured to calculate the flow rate. These sensors are known for their accuracy and are especially useful in difficult conditions, such as low-reynolds-number flows.

Segmental Wedge Flow Element

Segmental Wedge Flow Elements have a distinct, wedge-shaped restriction that generates a differential pressure, measuring the flow rate. They’re particularly effective for sludges, slurries, and other flows with a high solids content, which can pose challenges for other flow elements.

Elbow Flow Element

Elbow Flow Elements take advantage of a simple fact: fluid turning a corner creates a pressure drop. By placing a sensor on the inside and outside of the elbow, we can measure this pressure drop and calculate the flow rate. These devices are useful when space is limited.

Orifice Plate Throttle

Orifice Plate Throttles are one of the simplest and most widely used flow elements. They involve a flat plate with a hole in the middle, placed within the pipe. The pressure change as fluid flows through this hole gives us the flow rate. Simple, reliable, and cost-effective, these devices are a go-to in many industries.

Remember, choosing the right flow element depends on your specific needs, conditions, and the nature of your fluid. By understanding these different types, you’re well-equipped to make an informed decision. So, let’s continue to dive deeper into the world of flow elements!

Understanding Flow Rates and Measurements

Flow rate is crucial in a multitude of industries, including manufacturing, oil production, and water treatment, to name just a few. But how do we measure it? That’s where flow elements and the concept of differential pressure come in.

Flow elements are devices that create a change, or a difference, in pressure as the fluid passes through them – hence the term ‘differential pressure.’ Think of sticking your hand out of the window of a moving car. When you hold your hand flat, parallel to the ground, you feel a certain amount of pressure from the wind. Now, tilt your hand – the pressure changes. Flow elements create and measure this change in pressure, and from it, they can calculate the flow rate.

This is the basic principle behind differential pressure flow meters. These devices consist of a flow element, which creates a pressure drop, and a transducer, which measures this drop. The greater the flow, the larger the pressure drop, and vice versa.

Top Flow Element Products

Orifice Plate Flow Meter
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Applications of Flow Elements

Flow elements might be small, but they play a massive role in many industries worldwide. Let’s explore some of the applications where flow elements make a significant difference.

In the oil and gas industry, flow elements are vital. They help measure the flow rates of oil, natural gas, and other fluids in pipelines, helping companies monitor production, detect leaks, and ensure safe and efficient operations.

In wastewater treatment, flow elements measure the rate of flow of wastewater and other fluids, crucial for effective treatment and processing. They help control the treatment processes, ensuring that the right amount of water is treated and that the treatment chemicals are added in the correct quantities.

In HVAC systems, flow elements measure the flow rate of air and other gases. This data allows for the control and optimization of these systems, ensuring that buildings are kept at the right temperature and humidity levels.

The food and beverage industry also relies heavily on flow elements. They measure the flow rate of various liquids, from water used in cleaning processes to the liquids that make up our favorite drinks. These measurements ensure product quality and consistency, and help with portion control.

In the pharmaceutical industry, flow elements play a crucial role in ensuring that the right quantities of fluids are used in the production of medicines. This is crucial for product quality and safety, as well as for meeting strict industry regulations.

So, there you have it! From the oil in our cars to the air in our homes, the water in our cities to the drinks in our fridge, flow elements are hard at work. These small devices play a big role in making our world run smoothly.

FAQ

Flow elements are devices used to measure the rate at which a fluid, like a gas or a liquid, is flowing through a pipe or conduit. They create a change in pressure as the fluid flows through them. This pressure change, known as differential pressure, is then measured and used to calculate the flow rate.

The primary purpose of a flow element is to create a pressure difference, or differential pressure, within a fluid flow. By creating this pressure difference and measuring it, flow elements can calculate the rate at which the fluid is flowing. This is vital for controlling and optimizing many processes across various industries, such as manufacturing, oil and gas, water treatment, and more.

The working principle of a flow element involves creating and measuring a change in pressure. As a fluid flows through the flow element, it causes a pressure drop. This pressure drop is proportional to the square of the flow rate. By measuring this pressure drop, the flow element can calculate the rate of fluid flow.

A flow sensing element is another term for a flow element. It’s a part of a flow meter that creates a change in pressure, measures this pressure change, and uses the measurement to calculate the rate of fluid flow. This information is essential for a wide variety of applications, from managing water supplies to controlling industrial processes.

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Remember that not all flow elements are created equal. Choosing the right type for your specific needs and conditions is vital. Whether it’s an Orifice Plate, a Venturi Tube, a Pitot Tube, or any other type, each offers unique advantages and capabilities.

At Sino-Inst, we bring a wealth of experience as manufacturers and suppliers in this domain. We offer a wide range of flow elements, and we stand ready to customize solutions that meet your unique requirements. Our mission is to help you navigate the complexities of flow measurements with ease and confidence.

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