classification of radar level transmitter frequency range

The radar level Transmitter is a measuring instrument based on electromagnetic wave emission and reflection reception to judge the level of material. According to the type of transmitted signal, it is divided into two categories: pulse radar and frequency modulation continuous wave radar.

Pulse radar is measured based on time domain reflectometry (TDR). That is, the radar antenna emits high-frequency pulse electromagnetic waves, which propagate at the speed of light.

When encountering the surface of the measured medium, part of the pulse of the radar level Transmitter is reflected to form an echo back To the pulse emission device. The distance between the emission device and the surface of the measured medium is proportional to the propagation time of the pulse. The height of the liquid level is obtained by calculation.

Frequency modulation continuous wave radar is based on the frequency difference of frequency modulation continuous wave (FMCW). That is, the radar uses synchronous frequency modulation technology. The transmitter and receiver are installed on the top.

The transmitter emits a microwave signal whose frequency has been linearly modulated to the liquid surface. When the microwave When the signal propagates down to the liquid surface and is reflected back to the receiver. Due to the time delay, the frequency of the transmitted signal changes. The distance passed by the radar wave is calculated by the frequency difference between the received reflected wave and the transmitted wave.

Generally speaking, the larger the frequency modulation range, the longer the measurement distance, the better the linearity and the higher the resolution.

Microwave refers to electromagnetic waves with frequencies ranging from 300MHz to 3x103GHz, and their corresponding wavelengths range from 0.1mm to 1m. This segment of the electromagnetic spectrum includes decimeter waves (frequency range 300MHz~3GHz), centimeter waves (frequency range 3~30GHz), millimeter waves (frequency range 30~300GHz) and submillimeter waves (frequency range (300MHz~3x103GHz) ) four bands.

The common radars on the market are 6GHz, 26GHz and 80GHz that appeared in the last two years. The wavelength of the 6GHz radar is 50mm, and the wavelength of the 26GHz radar is 11mm, both of which are centimeter wave radars. They belong to microwave radars that work in the centimeter wave band for detection. The wavelength of the 80GHz radar is 4mm, which belongs to the millimeter wave radar working in the millimeter wave band.

Comparison of different frequency radar level transmitters

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

Effect of radar level transmitter frequency range on measurement

The radar level gauge emits electromagnetic waves through the antenna. The higher the frequency of the electromagnetic wave, the higher the energy of the electromagnetic wave. The shorter the wavelength, the more obvious the scattering phenomenon. Conversely, the lower the energy, the longer the wavelength, and the energy is not easily absorbed by the gas phase layer.

For the same size antenna, a liquid level sensor with a wavelength of 1.2 cm and a frequency of 26 GHZ has a gain of 6 times higher than that of a liquid level sensor with a wavelength of 3 cm and a frequency of 10 GHZ. (Remarks: Antenna gain is a parameter indicating the degree of radiation concentration of a directional antenna).

The overall beamwidth of a radar level gauge is inversely proportional to the frequency of the device. Therefore, for the same diameter antenna, if the frequency of the radar level gauge is increased, the beam width will be lower than that of the lower frequency equipment, and the narrow beam can minimize the influence of the nozzle, tank wall and interference.

At the same time, the measurement range of the radar level gauge is also affected by factors such as frequency, antenna size, dielectric constant of the liquid, and process conditions.

Featured Radar Level Transmitters

The difference in application of radar level transmitter frequency range

Dirty and polluted environment

With long-term use, dirt and pollutants accumulated on the antenna will affect the strength and direction of the radar signal. For high frequency signals, any dirt that covers the antenna will absorb more energy, and the direction of the beam may change. This results in a loss of signal strength. So, low-frequency and medium-frequency technologies are more suitable.

Storage tanks with condensate and/or steam

Condensation and steam can cause reflections on product surfaces to be masked by the “noise” of water droplets. This is more of a problem for high frequency signals. So mid and low frequency techniques are a better choice. Antennas with flat, horizontal surfaces should always be avoided for condensation.

High steam and agitation

Be sure to choose the 80G millimeter-wave radar level meter. The 80G radar level meter has a high transmission frequency and has good penetration and is not affected by steam. The 2° transmission angle can effectively avoid the interference of the stirring blade. The unique echo Tracking algorithm avoids reading multiple echoes when the material level is high.

Applications with turbulence, waves and ripples

Waves and ripples are often found on the surface of process liquids in large tanks. And this turbulence is especially detrimental to high-frequency measurements. Low and mid frequency level instruments emit longer wavelengths, making them perform better.

Foam application

Like dust and condensation, a layer of foam on top of the liquid can absorb the radar signal, making accurate measurements more difficult. Low frequencies work best with thick foams, such as beer, molasses, or latex. For lighter foam, the mids perform well. High frequency techniques should be avoided in foam applications.

Read more about: Stilling Wells for Radar Level Measurement

Bulk liquid storage tank

Many bulk storage tanks use floating roof tanks that require level measurement through stilling pipes. Low frequency radars are preferred for these applications as they are less sensitive to buildup on pipe walls. Except in not perfectly straight tanks and pipes. High frequency radars would have difficulty in this situation.

Small and medium container

These vessels are often up to 20 meters (m) high and often present challenging conditions. such as condensation, contamination, turbulence and foam. IF technology is a good choice in this tank because it combines small antennas with good reliability.

Small tank/bucket

In small tanks approximately 0.5 to 1.5 m high, the size and position of the nozzles may be restricted. Short measurement ranges and the need for small antennas mean that HF and MF technologies are attractive options for these applications.

Solid level

For measuring the level of solids, the optimum frequency depends on the application. Low and mid frequencies can handle dust, condensation and coarse solids. High frequency is suitable for fine powder.

Condensation is often challenging for high-frequency radars. But with solids another problem arises: Condensation combined with certain types of solids can lead to rapid buildup of material. This quickly clogs the small nozzle opening and covers the small antenna of the high frequency radar.

Read more: The Impact of Frequency in Non-Contacting Radar Level Measurement by Emerson

More Level Measurement Solutions

Radar level gauge is favored by the majority of users because of its unique advantages. Whether it is toxic medium, corrosive medium or solid medium, it can withstand various harsh measurement conditions and maintain stable and reliable work. Liquid is still dust. Slurry material medium, can achieve stable and accurate measurement.

About What Is Radar Level Transmitter Frequency Range? I hope that through this article, you can have a detailed understanding. Frequency band selection is an important consideration when deciding which non-contact radar device is the best choice for each different level measurement application.

The difference in the application of radar level transmitter frequency range is summed up after our many years of experience.

When measuring steam and foam, and condensate, choose low-frequency radar first.
In most other applications, high frequency radars are preferred for ease of installation. Lower frequencies reduce sensitivity to vapor, foam and antenna contamination.
Low frequency radars have a wider beam velocity angle to better deal with steam, dust, condensation, contamination and turbulent surfaces.
Higher frequencies minimize the effect on nozzles, tank walls and disturbances.

If you need to choose radar level transmitter, or still have doubt about radar level transmitter frequency range. Please feel free to contact our sales engineers.

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Guided Wave Radar Level Transmitter Calibration

1. Through the HART handheld programmer. However, the HART handheld programmer has its adjustment range. It is not applicable to all products. The combined measurement range is the corresponding value of 4-20mA.
2. Adjust the module by hand. Its function is equivalent to an analysis and processing instrument. The programmer consists of keys and an LCD display. Adjustment menus and parameter settings can be displayed.
3. By debugging the software. The guided wave radar level transmitter can be debugged through software.
   The process is: mainly use HART software for debugging. A meter driver is required. Among them, when using software debugging, power up the radar instrument with 24VDC. At the same time, add a 250 ohm resistor to the front end of the HART adapter. If the instrument is powered by an integrated HART resistor, that is, the internal resistance is 250 ohms, no additional external resistance is required. At this time, the HART adapter can be connected in parallel with the 4–20mA line.

The above are relatively common debugging methods and means for guided wave radar level transmitters. You can correspond to your actual situation and judge the most suitable method for you to use. Do it last. Remember to be careful when choosing a method, otherwise errors are prone to occur.

Guided Wave Radar Level Transmitter Troubleshooting

Guided Wave Radar Level Transmitter has many advantages in the level meter field. It generally adopts an integrated design, no moving parts, no mechanical wear, and long service life. And it can be used for level measurement of almost all liquids. However, in the process of use, there will still be inaccurate measurements. What’s the matter?

1. Probe scarring and frequent failures

Solution: The first solution is to increase the installation position of the Guided Wave Radar Level Transmitter probe. However, if the installation condition is limited and cannot be increased, the method of interlocking the liquid level measurement value with the pump of the tank can be used to solve the problem. This problem. Reduce the maximum liquid level set value by about 0.5m. When the liquid level reaches the maximum value, you can stop or start the discharge pump.

2. The effect of foam on measurement

Solution: Both dry foam and wet foam can reflect the radar wave of the Guided Wave Radar Level Transmitter, which has no effect on the measurement. But neutral foam absorbs and diffuses radar waves. Reflections that seriously affect echoes or even no echoes.

Therefore, when the surface of the medium is dense and thick foam, the measurement error of the Guided Wave Radar Level Transmitter will be large or impossible to measure. It is recommended to replace other suitable type of level meter.

3. Antenna scarring

Solution: The hanging material with a small dielectric constant has no effect on the measurement in a dry state. However, the hanging material with a high dielectric constant will affect the measurement. Blowing with compressed air (or flushing with clean water) is recommended, and cooled compressed air can reduce the temperature of flanges and electrical components. Although alkaline scabs can also be cleaned with an acidic cleaning solution, level measurements cannot be taken during cleaning. More about Advantages of Coaxial Probes.

4. Guided Wave Radar Level Transmitter antenna flooded

Solution: Change Guided Wave Radar Level Transmitter to waveguide measurement.

Install the Guided Wave Radar Level Transmitter at the original opening, and the waveguide is about 0.2m higher than the exhaust pipe. In this way, even if there is a bad working condition where the slurry overflows from the exhaust pipe, the level meter antenna will not be damaged The slurry is submerged. And it will not cause the disturbance of the stirrer vortex and a large amount of steam from the probe, which reduces the damage to the probe.

In addition, due to the better focusing effect of the waveguide, the received radar wave signal will be stronger. Therefore, better measurement results can be obtained.

The above content is for reference only. Of course, there are other reasons for the inaccurate measurement of the Guided Wave Radar Level Transmitter, which needs to be checked in combination with the actual situation.

Featured Guided Wave Radar Level Transmitters

More about Guided Wave Radar Level Transmitter technology and application:

• Guided-wave radar (GWR) level transmitter working principle
• Influence of Dielectric Constant on Guided Wave Radar Level Meter
• Guided wave radar level transmitter measures drum level

What is the difference between radar and guided wave radar level transmitter?

1. Different ways of contact:
   Radar level gauges are non-contact. Guided wave level gauge is contact type. That is to say, the guided wave type cannot be used in occasions with high food grade requirements.
2. Different working media:
   The guided wave radar level gauge also needs to consider the corrosiveness and adhesion of the medium. Moreover, the installation and maintenance of guided wave radars that are too long are more difficult.
   In the case of low permittivity, the measuring principle of radar or guided wave radar is based on the difference in permittivity. Since the waves emitted by ordinary radar are divergent, when the dielectric constant is too low, the signal is too weak to measure stably. Guided wave radar waves propagate along the probe, and the signal is relatively stable.
3. Different types of selection:
   Ordinary radar can be used interchangeably. Guided wave radar cannot be used interchangeably because the probe (cable) has a fixed length according to the original working conditions. The selection of guided wave radar is more troublesome than ordinary radar.
4. Different ranging:
   Ordinary radar is mostly used on 30 and 40m tanks, and can even measure to 150m. Guided wave radar also needs to consider the force of the probe (cable). It is precisely because of the force that the measurement distance of guided wave radar is generally not very long.
   However, guided wave radar has obvious advantages in special working conditions such as stirring in the tank and large fluctuations in the medium. The measured value of the guided wave radar fixed at the bottom of this working condition is more stable than that of the flexible radar. And small tanks. For liquid level measurement, due to the small installation and measurement space (or a lot of interference in the tank), general radar is not applicable, and the advantages of guided wave radar are reflected at this time.

More Tank Level Measurement Solutions

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

Guided Wave Radar Level Transmitter has an absolute advantage in solid working conditions. for example:

1. If there is stirring in the tank and the medium fluctuates greatly, the measured value of the guided wave radar fixed at the bottom is more stable than that of ordinary radar;
2. Level measurement in small tanks.
3. Working conditions with low dielectric constant.
4. The general guided wave radar also has a bottom detection function, which can be corrected according to the measured value of the bottom echo signal to make the signal more stable and accurate.

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

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

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

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When do we need to use Stilling Wells?

Usually, the radar level meter is installed in Stilling Wells because the interference signal caused by certain factors has a great influence on the real signal, resulting in measurement errors or even failure to measure. The radar level meter is installed in the Stilling Wells, which can avoid the influence of the interference signal on the real signal and ensure the accuracy of the measurement.

So, under what circumstances will the radar level meter be installed in Stilling Wells?

Situation 1: There are obstacles in the storage tank or large foam and fluctuations on the liquid level. In this case, interfering signals can significantly affect the measurement.

Situation 2: The dielectric constant of the medium is low, and the reflected echo is too small to accurately measure the liquid level. Using the radar level meter installed in Stilling Wells can increase the reflected echo energy and ensure accurate measurement.

Using Stilling Wells installation (Stilling Wells or bypass pipe), you can avoid the impact of obstacles, foam, liquid surface fluctuations in the container on the measurement.

Stilling Wells can only measure medium with good fluidity. Viscous medium cannot be measured with Stilling Wells.

Advantages of Stilling Wells for Radar Level Measurement:

The advantage of Stilling Wells measurement is that the liquid level in the pipe is stable and not disturbed by external fluctuations.
Avoid interference from obstacles inside the container.
Reduce the influence of foam and air turbulence on the measurement.
Increase signal reflection strength.
For the case where the measured object has boiling or turbulent liquid level, or the dielectric constant of the measured medium is small, measures such as Stilling Wells should be used to ensure the measurement accuracy.

The accuracy of the radar level meter differs under actual application and reference conditions. The main reason is that the tank itself has become part of the measurement system. The ability to achieve accuracy is determined by the interference of the microwaves by the tank and its internal obstructions.

After the pressure spherical tank is built, the draft tube becomes a part of the tank body. Its manufacturing process level directly affects the measurement accuracy of the radar level meter.

The electromagnetic wave emitted by the radar level meter propagates along a straight line. When interference is encountered in Stilling Wells, a reflected echo will be generated, and the echo amplitude is small. On the contrary, if the smoothness of the inner wall of the pipe is not ideal, it will show a reflection echo with a large amplitude.

Read More about: List of Differences: Radar vs Ultrasonic Level Measurement

Featured Radar Level Meters

Radar level meter installation standards

The installation position of the radar level meter affects the measurement accuracy. Pay full attention to several issues:

1. Radar level meter The distance between the tank hole and the tank wall is greater than 15% of the height between the flange sealing surface and the tank bottom plate, so it is limited to using guided waves to close the pipeline.
2. In order to ensure that the sound signal enters the middle of the storage tank unhindered, the total length of the flange and pipe joint of the radar level meter socket is less than 250mm.
3. If there is a waveguide; the waveguide should be horizontally downward, the allowable error ≤ 0.5; the verticality should be 1.
4. Installation and connection should take into account the strength of the tank roof so as not to cause variable displacement.
5. The radar wave path should avoid internal obstacles, such as brackets, heating wires, stirring rods, etc.
6. Consider liquid level conditions and avoid formation of air bubbles such as turbulence at the discharge end.

Radar level meter production requirements

When the storage tank is a floating roof tank or a spherical tank, a waveguide shall be used.
When the medium level fluctuates or foams, the waveguide should also be actively added.

The waveguide is not purchased together with the equipment supply, and should be manufactured on site by the supervisory unit according to the specific working conditions.

The specific conditions for manufacturing Stilling Wells are as follows:

1. Stilling Wells shall be constructed of stainless steel or carbon steel, and only stainless steel shall be used for spherical tanks.
2. Stilling Wells should be complete. If it needs to be lengthened, the jacket welding method must be used. The gap is less than 1.0mm. There should be no welds or sharp edges on the inner wall of the welding. Otherwise, its accuracy will be affected.
3. The bottom of the Stilling Wells is 100~150mm away from the bottom plate of the fuel tank. Then add a reflector radar inclined at 45°.
4. In order to ensure that the liquid levels outside the Stilling Wells are equal, the Stilling Wells must be separated at the intersection holes, and the plane of the Stilling Wells section must be smooth, otherwise false liquid levels are prone to occur. The hole spacing should be appropriate and not too large, so as not to cause fluctuations in the liquid level in the pipe;
5. It cannot be too small, and it is not very effective to ensure that the liquid level inside and outside the Stilling Wells is consistent.

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

Our experience:

Stilling Wells should be made of carbon steel or stainless steel. If it is used in spherical tanks, stainless steel must be used. This is the result of years of experience.

In addition, it is recommended that Stilling Wells be made into whole roots. If lengthening is required, the outer jacket welding method must be used. And the gap should be less than 1 mm. There must be no burrs and welds on the inner wall. Burrs and welds will interfere with the real echo signal and affect the measurement effect.

The last point, which is crucial, is directly related to whether the liquid level is true. Therefore, more attention is required. When making Stilling Wells, it is necessary to use the interval distance to cross the holes. The opening should not be too large, nor too small. If it is too large, the liquid level in the tank will fluctuate easily. If it is too small, the internal and external liquid levels of Stilling Wells cannot be guaranteed to be consistent.

Based on years of experience, some engineers have made a correspondence between the diameter and opening size of Stilling Wells. When the diameter of Stilling Wells is DN125, DN200, DN250 and DN300, the opening sizes of Stilling Wells are 0.1m, 0.4m, 0.8m and 1.2m in sequence.

The above three points are all the experience summarized by Sino-Inst. In addition, some materials have also mentioned that a certain distance should be kept between the bottom of the Stilling Wells and the bottom of the storage tank, and reflectors should be installed. If you have installation needs, you can find more relevant information or ask more relevant engineers.

In order to ensure the accuracy of radar level meter measurement, in addition to installing Stilling Wells, some can also install bypass pipes. You can choose the appropriate method according to your own working conditions.

More Tank Level Measurement Solutions

The radar level gauge is installed in the waveguide, which can avoid the influence of interference signals on the real signal, increase the reflected echo energy, and improve measurement accuracy. But not all media are suitable for measurement in the waveguide, and viscous media are not.

Therefore, when choosing to install a radar level gauge in the waveguide, it is necessary to analyze the medium and the working conditions to avoid useless work.

Many times, there is more than one way to solve a problem. When there is a problem in the measurement of the radar level gauge, we can think about it and see which solution is most suitable for our working conditions.

If we pay attention to efficiency, then we can find the simplest solution;
If we pay attention to cost performance, we can consider it from the perspective of cost and find the most suitable solution.

Sino-Inst is an instrument manufacturer specializing in R&D, production and sales of radar level meters and radar water level gauges. We supply high frequency radar level meters, explosion-proof radar level meters, FM radar level meters, guided wave radar level meters, pulse radar water More than 10000 level meters.

If you need to purchase radar level meters, or have any technical questions about the application and installation of radar level meters, please feel free to contact us.

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Difficulties in Measuring Powder and Granular Silos

Measurement difficulty 1:

The silo is slender and the space is narrow. The measurement signal is easy to hit the silo wall.

If there are obstacles such as ring beams on the warehouse wall, or material hangs on the warehouse wall due to the humidity of the material. False signals will be generated, which will seriously affect the measurement.

At the same time, due to the narrow space, the measurement signal cannot avoid the material flow. Which will also cause a significant attenuation of the signal.

Measurement difficulty 2:

The dust is large. It will cause great loss to the signal.

As a result, the material level signal is greatly reduced, and even no signal can be recovered.

Measurement difficulty 3:

Adhesion to meter antenna.

For wet materials, the powder is easy to form serious adhesion on the antenna of the radar level gauge;

For dry materials, due to the collision and friction between the particles, the powder is prone to static electricity. This will accelerate the adsorption of the powder on the antenna. And will also cause serious adhesion problems.

Measurement difficulty 4:

The general powder dielectric constant is very low.

For example, fly ash, lime powder, and pulverized coal in power plants. Plastic powder, plastic granules, and catalyst particles in petrochemical plants. In addition, there are alumina powder, silica powder, cement, wood chips, etc. The dielectric constant is very low. For radar As far as the instrument is concerned, it will cause the instability of the material level signal. Even the material level signal cannot be received.

At present, the detection method of silo material level mainly relies on ultrasonic level gauge, radar level gauge, laser range finder and so on.
Some detection methods can only be used as an alarm signal. That is, the material is lower than the material level to replenish the material in time, and the material level is higher than the material level to stop filling.
Some methods are limited by technical principles and have strict requirements on installation conditions.
Some methods are limited by measuring height, making them expensive.

So, why is the radar level meter so popular?

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

Silo Radar Level Measurement-Cement

Material level is one of the main measurement parameters of cement production enterprises. Compared with other production enterprises, cement enterprises measure less liquid level. It is mainly the measurement of the height of solid matter in the production process.

Solid materials are lumpy, granular, and powdery. These materials also vary in dielectric constant, bulk density, temperature range, and moisture content.

The main raw materials for cement production are: limestone, clay (shale, sandstone), iron powder (iron ore, iron slag), coal gangue, industrial waste residue, raw coal, gypsum, slag, fly ash.

The above raw materials enter their respective silos after drying and crushing. At this time, high-frequency Radar Level Meters can be used to monitor the material level.

Contact level measurement is the main measurement method of cement production enterprises in the past. Such as capacitive type, weight level gauge, tuning fork, and other measurement methods. During the contact process of measuring things, measuring instruments and materials, they often face a large number of Routine maintenance. Such as the problem of capacitor material hooking.

By the end of the 20th century, the cement industry started using non-contact level measurement.

The following points should be paid special attention to when cement production enterprises choose Radar Level Meters:

1. Pulse and FMCW radar

Generally divided into two categories: pulsed (impulse) radars and frequency modulated continuous wave (FMCW) radars are used to measure radar levels with level gauges.

Large measurement range and high reliability due to radar transmission power. This is the reason why Radar Level Meters are widely used in the cement industry recently.

2. Selection of granular materials

The raw materials of cement are mostly in granular matter, and some are block materials. Such as limestone, coal, oil shale. It is recommended to use non-contact Radar Level Meters, horn antenna Radar Level Meters.

3. Selection of powdery materials

The materials in the cement and cement grinding warehouses are the cement raw materials. The powder of these materials is difficult to predict the substance level. The surface of the powder is very loose, which is very difficult for microwave reflection. It is recommended to use contact Radar Level Meters, or non-contact radar level gauges with horn antennas. This is a typical radar application in China.

4. Cable

Most of the current Radar Level Meters are integrated and powered by wires. It can be directly connected to the control system module and output 4~20mA analog signals. It can save a lot of cables. It also provides a variety of HART digital signals. Protocol and fieldbus digital communication .The connection of the computer monitoring system is very convenient.

It should be noted that guided wave radar should be used with caution in powder measurement in cement plants. This is because most cement plant drying equipment is not ideal. There is often moisture or even steam. Once condensation will cause various powders to condense on the Caused a fault on the waveguide cable.

In addition, depending on the range, for powdery materials such as fly ash, slag powder, cement products, etc., parabolic antenna radar can also be used.

The level measurement of cement plays a very important role in the automation system of the cement production line. The application of Radar Level Meters can relieve the variety, accuracy, standard substance, pressure, high temperature, explosion. It greatly facilitates the cement production enterprises in the level parameters Accurate measurement on the surface. The existing Radar Level Meters technical level and on-site use are sufficient to meet the requirements of detection and control.

Silo Radar Level Measurement – Grain Silo

There are many kinds of media in the granary, and rice is a kind of grain. Then it is ok to want to use Radar Level Meters to measure the rice in the granary. Radar Level Meters can not only measure the rice in the granary, but also measure various media in the coal bunker.

Radar Level Meters can choose the conventional 26GHz/80GHz planar radar level meter to measure the rice in the granary. The measurement range selected by the selection is a distance of 70m. Debugging mode is with LCD display type. The power supply is 24V. Output signal selection 4-20mA. Can also bring HART protocol.

Silo Radar Level Measurement-Raw Coal

The fuel bunker is usually a raw coal bunker or a pulverized coal bunker, and the medium of the raw coal bunker is raw coal with larger particles and less dust than the pulverized coal bunker. Radar Level Meters are suitable for this situation.

The pulverized coal particles in the pulverized coal bin are small and have a lot of dust. If the proportion of pulverized coal exceeds 70%. In addition, the measurement environment of pulverized coal material level is harsh and the coal quality is unstable. Due to the influence of factors such as the position of the material port, it is more appropriate to use a radar level gauge with stronger anti-interference ability.

The common forms of Radar Level Meters are bell mouth type, parabolic type and rod type. The difference in structure is mainly due to the difference in transmission frequency, beam angle and measurement range. The measurement distance of the fuel tank is not very long, so the commonly used bell mouth radar level gauge is the best choice.

Because of the high reliability, stability and accuracy of Radar Level Meters, it is widely used in fuel tank level measurement. However, in order to obtain accurate material level measurement values, special attention should be paid to the installation of Radar Level Meters to avoid radar echoes being interfered by interference sources.

Here are a few installation tips for Radar Level Meters to measure fuel tanks:
The selection of the installation position needs to be based on the form of the fuel tank, and the top-mounted form is adopted;
In addition, keep a certain distance from the wall of the fuel tank to reduce the reflection and interference of the tank wall;
It is also necessary to keep a certain distance from the discharge port of the fuel bin to reduce the interference of fuel and dust at the discharge port.

Silo Radar Level Measurement-HDPE Pellet Silo

The high-density polyethylene powder silo has a slender body, large dust, and low dielectric constant of the medium; it poses a great challenge to the level measurement.

Aiming at the characteristics and complexity of large powder silo measurement, Sino-Inst’s radar level gauge has a range of up to 120m. Due to its high focus, strong signal, high dust resistance and other characteristics. It can well solve the above measurement difficulties and achieve stable and accurate measurement.

Featured Radar level meters for Silo

More Featured Soli Level Measurement Solutions

The powder silo is an application that is difficult to use continuous level measurement in solid level measurement. Especially for large, slender powder silos. Greater challenges are posed to measuring instruments.

Currently on the market, there are mainly capacitance, ultrasonic level gauges, guided wave radar level gauges and high-frequency radar level gauges that can be used to measure powder silos.

Each measurement method has its own advantages and disadvantages. But all in all, Silo Radar Level Measurement is the most successful and widely used.

Especially high-frequency radar level gauges with small emission angles. Thanks to the rapid development of high-frequency radar technology.

It has continuously overcome insurmountable obstacles such as large range, narrow space, high dust, and low dielectric constant in the past. It has achieved great success in the continuous level measurement application of Silo Radar Level Measurement.

If you have any questions about Silo Radar Level Measurement, . Or you need Silo Radar Level Measurement technical support, please feel free to contact our sales engineers.

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Why is crude oil level measurement challenging?

What everyone thinks must be the characteristics of the medium of crude oil.

Crude oil, usually referred to as unprocessed petroleum, is a viscous liquid. When the temperature is between minus 50 ℃ and 35 ℃ above zero, solidification will occur, changing from a liquid shape to a solid shape.

From this information, crude oil is viscous and tends to solidify when the temperature drops to the freezing point. Therefore, in order to ensure that the crude oil is always in a liquid state, the storage tank for storing the crude oil may be accompanied by a heating device. This is one of the working conditions.

Of course, there are many factors that can affect the accuracy of crude oil measurement, including the type of tank, the temperature and density of the oil, and the presence of water or sediment in the tank. Inaccurate measurements can lead to costly errors in production, transportation and refining operations.

Crude oil is typically stored in large tanks ranging in size from 10,000 to 50,000 barrels (4.5 to 22.5 million liters). These tanks are often located in remote areas, making it difficult to access them for monitoring and inspection. In addition, the oil in the tanks is typically very hot – up to 150 degrees Fahrenheit (65 degrees Celsius) – and under high pressure. These conditions can make it difficult to get accurate readings of the oil level.

Water and sediment can also accumulate in the bottom of the tank, which can throw off measurements of the oil level. Inaccurate measurement of the crude oil level can lead to over- or under-estimating the amount of oil in a tank, which can have serious consequences for production, transportation and refining operations.

To ensure accurate crude oil measurement, it is important to use a reliable and well-calibrated measuring device. In addition, regular monitoring and inspection of the tank is essential to identify any potential problems that could affect the accuracy of the measurements.

Extended reading: liquid nitrogen level sensor

Crude oil measurement – Radar level meter measuring vaulted buffer tank

Distinguished from the shape, Crude oil storage tanks are divided into lying tanks, round tanks, conical tanks, arch-shaped tanks and so on. Distinguished from the use, storage tanks are divided into process tanks and metering tanks.

So, if the radar level meter is used to measure the crude oil in the process, and the crude oil is installed in the vaulted tank. What should you pay attention to Crude oil measurement?

First of all, process tank measurement should pay attention to the selection and installation of radar level meter. The process tank, is not used for direct trading. So the accuracy requirement is not very high. But stability is an aspect that needs attention.

Radar level meter selection, you can consider high-frequency radar level meter. When installing, pay attention to whether there are stirring devices or heating devices in the tank. If there is, pay attention to avoid these obstacles. To avoid causing inaccurate measurement, or even the inability to measure the situation.

From the arch-shaped tank alone, the selection of radar level meter is basically unaffected by the tank, but the installation needs to pay attention to the following. From the arch-shaped tank alone, the radar level meter selection is basically unaffected. But the installation needs to pay attention to the following. Normally, the radar level meter is installed in the vaulted tank. Do not install in the middle of the filling top. To avoid the generation of indirect echoes. Affect the real echo.

Finally, radar level meter to measure crude oil, pay attention to the characteristics of crude oil. Select the appropriate radar level meter model.

According to the information, for a long time in the past, the crude oil vault tank level measurement, are used to manually check the ruler + steel band level meter. As a result, there were often cases of stuck steel belt and stuck shaft.

The result of such a result is inseparable from the characteristics of crude oil. Crude oil has a certain viscosity. If there is a heating device present, there will also be water vapor present. Select radar level meter, as far as possible, choose non-contact radar level meter.

The use of the measured medium is different, the choice of level meter is different. The measured medium used in the tank is different, the choice of level meter is different. The characteristics of the measured medium are different, and the type of level meter is also different.

So no matter what kind of media measurement, we must know the working conditions, know the medium, know the use. This will ensure that the right type, the measurement can be accurate. Liquid level meter to play the maximum role.

Extended reading: Fuel-Diesel-Water Tank Level Sensor Monitoring

Summary:

Here’s a quick overview of how to use radar level transmitters to measure the level of crude oil:

1. First, you’ll need to install the radar level transmitter on the tank. Make sure that it’s installed properly and securely.

2. Once the radar level transmitter is installed, turn it on and calibrate it according to the instructions in the manual.

3. When the radar level transmitter is calibrated, it will be able to measure the level of crude oil in the tank.

4. You can check the readings on the radar level transmitter at any time to see how much crude oil is in the tank.

That’s all there is to it! Using a radar level transmitter is the best way to get accurate readings of the level of crude oil in a tank. If you need any help, don’t hesitate to contact Sino-Inst for assistance.

Extended Reading: Low Cost Float Level Sensor for Tank Liquid Volume Monitoring

More Oil level Monitoring & Measurement Solutions

If you need to measure high temperature and high pressure (-0.1MPa-32MPa) oil storage tanks, then learn about New Choice for Heating Oil Tank Level Sensor.

Sino-Inst is Manufacturer of 80G radar level meters for Crude oil measurement. We supply more than 20 kinds of radar level meters for Tanks. 40% 80G radar level meters, 40% 26G radar Level Meters and 20% other types level sensors.

80G radar level meters for Crude oil measurement are mainly used for level measurement of various oils tanks.

80G radar level meters for Crude oil measurement enable stable level measurement without tank modifications. This greatly meets the measurement needs of many applications. Can be used from small to large tanks.

Sino-Inst’s 80G radar level meters for Crude oil measurement, made in China. Having good Quality, With better price. Our level measurement instruments are widely used in China, India, Pakistan, the US, and other countries.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a 80G radar level meters for Crude oil measurement, flow sensor, or other device, give us a call.

Extended reading: Hydraulic oil flow measurement solutions.

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What is sludge blanket level?

Sludge (sludge) is a solid settling material produced by water and wastewater treatment processes. The sludge blanket level is the interface between the settled sludge and the turbid or clear water phase above. The sludge level can be the distance from the water surface (sludge level depth) or the distance from the bottom of the tank (sludge level height).

Due to the highly variable nature of all types of sludge, classification is essential, and its treatment and disposal are different. According to its origin, it can be classified as

• Municipal sludge (civil sludge, also called drainage cement sewage sludge,). It mainly refers to sludge from sewage plants, which is the largest category of sludge in terms of quantity. In addition, sludge from waterworks can also be included in this category.
• Pipe network sludge, sludge from drainage collection systems.
• River and lake sludge, sludge from rivers and lakes.
• Industrial sludge, from a mixture of solids and water, oil, chemical pollution, and organic matter produced by various industrial production.

In (waste) water treatment and process control, sludge water level is an important parameter. Especially in the process of phase separation, accurate sludge level information is crucial. Automatic Sludge Blanket Level Detector can be installed in clear, turbid or even heavily contaminated media with high concentration of suspended matter.

Extended Reading: How many types of level transmitters are there?

Sludge Blanket Level Detector Appliactions

• Waste treatment clarifiers.
• Primary sedimentation tanks, secondary sedimentation tanks, gravity sedimentation tanks.
• Petroleum/asphalt separation tanks.
• Paper pulp tanks.
• Beverage water clarifiers.
• Mining clarifiers.
• Brine tanks.
• Slurry tanks.
• Any vessel in which a liquid/solid two-phase interface exists.

Extended reading: cryogenic fuel level indicator

Sludge Blanket Level Measurement Cases

Extended reading: How to Choose the Right Diesel Fuel Level Sensor?

More Featured Ultrasonic Level Meters

More Level Measurement Solutions

Sino-Inst is Manufacturer of Automatic Sludge Blanket Level Detector. We supply more than 20 kinds of Ultrasonic Level Sensors. 40% ultrasonic level meters, 40% External Ultrasonic Liquid Level Meters and 20% Automatic Sludge Blanket Level Detectors.

Automatic Sludge Blanket Level Detector reference wholesale price USD 755.00/set

Automatic Sludge Blanket Level Detector is commonly used for sludge interface measurement in primary and secondary settling tanks, sludge thickening tanks in wastewater treatment. And sedimentation tank level measurement in water treatment plants.

It is also widely used in industries that require solid-liquid separation in production processes such as paper, mining, power, and petroleum. Monitoring the height of solids in the sedimentation process. For example, oil/asphalt separation tank, paper pulp tank, power mortar sedimentation tank, mining clarification tank, etc.

Automatic Sludge Blanket Level Detectors enable stable level measurement without tank modifications. This greatly meets the measurement needs of many applications. Can be used from small to large tanks.

Sino-Inst’s Automatic Sludge Blanket Level Detectors, made in China, Having good Quality, With better price. Our level measurement instruments are widely used in China, India, Pakistan, the US, and other countries.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Automatic Sludge Blanket Level Detector, flow sensor, or other device, give us a call.

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Featured Diesel Level Sensors

Types of Fuel-Diesel Level Sensors

Below are some of the most commonly used diesel level sensors that we have compiled.

Read More About: Difference Between Class 1 Div 1 And Class 1 Div 2

Fuel-Diesel-Water Tank Level Sensor Monitoring

The oil depot liquid level monitoring system is a multi-functional management system applied to the oil depot, which can effectively manage the inflow, sales and storage of oil products in the oil depot by accurately measuring the oil level, temperature and other data of the oil tank.

Sino-Inst oil depot storage tank monitoring system is based on high-precision Fuel Tank Diesel Level Sensors. Combined with a dedicated regulatory information system. Realize automatic oil measurement and supervision for oil depots.

The system can complete the automatic measurement of the oil in the oil storage tank through each Fuel Tank Diesel Level Sensors when the oil storage tank is closed. Complete the on-site controller to realize the operation, display and remote transmission of the data measured by the liquid level sensor in the entire storage area.

The remote computer combines the received data and passes it through its internal dedicated management software. Realize the analysis of oil parameters in the oil tank, and directly reflect the operation of the storage tank.

Managers can grasp and understand the operation of each storage tank in time through their own computers. So as to reasonably carry out the production arrangement and scheduling.

Extended reading: Advantages of Oval Gear Mechanical Diesel Flow Meters

Water Tank Level Sensors

The Water Tank Level Sensor is an important part of the water tank level control system. Using a level sensor for the water tank, solenoid valve, control box, liquid level switch and other accessories can effectively form a Water Tank Level control system. Monitor the materials stored in the water tank. Master important data such as its liquid level, reserves, and quality. A reasonable liquid level can ensure the safe, reliable, and efficient operation of the storage tank.

Read more about: Water Tank Level Sensors Types

Propane Level Sensors

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

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

Read More about: Large Propane Tank Level Indicator

Fuel Level Sensor Monitoring & Measurement Solution

Sino-Inst is Manufacturer of diesel level sensors. We supply more than 20 kinds of diesel level sensors for Tanks. 40% submersible level meters, 40% External Ultrasonic Liquid Level Meters and 20% other types level sensors.

Diesel level sensors for Tanks are mainly used for level measurement of various oils.
It can measure even liquids such as water, seawater, oil, and slurry.

diesel level sensors for Tanks enable stable level measurement without tank modifications. This greatly meets the measurement needs of many applications. Can be used from small to large tanks.

Sino-Inst’s diesel level sensors for Tanks, made in China, Having good Quality, With better price. Our level measurement instruments are widely used in China, India, Pakistan, the US, and other countries.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a diesel level sensors for Diesel Tanks, flow sensor, or other device, give us a call.

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Featured Ultrasonic Level Sensor for Diesel Tanks

Challenges of Level Measurement in Industrial Diesel Tanks

Because the substances stored in diesel tanks are usually flammable, explosive, volatile, and toxic. In the event of leakage, accidents such as fire and explosion are likely to occur. Therefore, the general diesel tanks are divided into two categories: trade tanks and intermediate tanks.

The liquid level, temperature, density, volume, and mass of the trading tank must be monitored and measured frequently, and the accuracy is required.

Tundish tanks are usually only monitored for parameters such as level, temperature and pressure (pressurized storage tanks). In order to prevent the oil tank from roofing and evacuation accidents, it does not need to be handed over for measurement.

The selection of the diesel tank level sensor should be determined according to the design results of the oil tank. Different structures choose different liquid level instruments. Buried storage tanks and surface tanks, Ultrasonic Level Sensor for Diesel Tanks are cost-effective options.

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

Features of Ultrasonic Fuel Level Sensors

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

Ultrasonic Fuel Level Sensor Working Principle

Here we sort by where and how ultrasonic level sensors are installed.

The first type is the opening of the tank with the sensor mounted on the top.
The second type is that the tank body does not have holes, and the sensor is attached to the outer wall of the tank.
The third type is the sensor attached to the bottom of the tank.

Ultrasonic Fuel Level Sensors for Challenging Applications

1. The measured medium is flammable and explosive. Most of them are liquids and gases. For example: gasoline, alcohol, toluene, xylene, acetone, biogas, gas, hydrogen, etc., most of which are organic compounds. Solid: There are metal magnesium, metal sodium, yellow phosphorus, etc.
2. Underground mines, including coal mines, iron ore, etc. Almost all mines require explosion-proof ultrasonic level sensors.
3. Occasions with large dust. For example: wood processing workshop; coal processing workshop; when the dust reaches a certain concentration, it will also cause an explosion.
4. Although there is no direct contact with flammable and explosive liquids and gases, it is also necessary to use explosion-proof ultrasonic level sensors and ultrasonic level sensors in explosion-proof areas. For example: fire pools in tank farms.

The above four situations require the installation of explosion-proof ultrasonic level sensors, which can avoid the existence of potential safety hazards.

Diesel Tank Level Monitoring System

The oil storage tank liquid level, temperature and pressure online monitoring system has changed the traditional method of using manual inspection ruler and laboratory analysis. Real-time dynamic monitoring of oil is realized. It provides accurate data basis for production operation and management decisions. Greatly avoid the occurrence of safety accidents.

All our level sensors support signal output. Including 4-20mA signal output. Or RS485 communication, etc.

So, if you connect the output signals of all liquid level sensors to a multi-channel recorder. Our paperless recorder can display and record the liquid level of each tank.

Extended reading: More Inline Digital Diesel Fuel Flow Meters

Monitoring Liquid Volume Solutions

Most of our liquid level sensors can output liquid level signals, such as 4-20mA signal, 0-10V signal, RS485 and so on.

However, the liquid level transmitter alone cannot calculate the liquid volume of tanks of different sizes. It’s too complicated. A separate recorder is required to calculate it.

Therefore, the digital display volume meter can collect, display and convert the liquid level of various regular and irregular tanks in the industrial field into the corresponding tank volume. It is suitable for monitoring, controlling and collecting various process parameters.

Ultrasonic technology is not only used to measure level, but also can be used to measure depth. More about The Difference Between Ultrasonic Depth Sensor And Ultrasonic Level Sensor.

More Featured Diesel Tank Level Sensors

More Featured Tank Level Measurement Solutions

Ultrasonic Fuel Level Sensor Price

Sino-Inst is Manufacturer of Ultrasonic Level Sensor for Diesel Tanks. We supply more than 20 kinds of Ultrasonic Level Sensor for Diesel Tanks. 40% ultrasonic level meters, 40% External Ultrasonic Liquid Level Meters and 20% Externally attached Ultrasonic oil level sensors.

Explosion-proof ultrasonic liquid level sensor reference wholesale price USD 285.00/pc

Ultrasonic Level Sensor for Diesel Tanks are mainly used for level measurement of various oils.
It can measure even liquids such as water, seawater, oil, and slurry.

Ultrasonic Level Sensor for Diesel Tanks enable stable level measurement without tank modifications. This greatly meets the measurement needs of many applications. Can be used from small to large tanks.

Sino-Inst’s Ultrasonic Level Sensor for Diesel Tanks, made in China, Having good Quality, With better price. Our level measurement instruments are widely used in China, India, Pakistan, the US, and other countries.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Ultrasonic Level Sensor for Diesel Tanks, flow sensor, or other device, give us a call.

Request a Quote