What Is Radar Type Level Transmitter?
The Radar Type Level Transmitter is a kind of instrument that measures the liquid level in the container by microwave. The Radar Type Level Transmitter provides reliable non-contact, maintenance-free continuous measurement of liquids in metal tanks or containers. Not affected by pressure, vacuum or temperature.
Excellent performance under harsh measurement conditions such as flammable, explosive, highly corrosive, high temperature, and viscous. Ideal for corrosive liquids, viscous liquids, slurries, or other applications where direct contact with the medium is not desired. Especially suitable for the measurement of large vertical tanks and spherical tanks. Low dielectric properties allow operation in liquids with a dielectric constant of 2 or greater. It can be used in almost every occasion.
Features of Radar Type Level Transmitters
- Radar Type Level Transmitter can measure liquid and solid media. For example: crude oil, slurry, raw coal, pulverized coal, volatile liquids, etc.;
- Can be measured in vacuum can measure all media with a dielectric constant> 1.2. Measuring range up to 150m;
- The power supply and output signal pass a two-core cable (loop circuit), using 4…20mA output or digital signal output;
- Non-contact measurement and installation are convenient and extremely stable materials are used. It is accurate and reliable with a resolution of up to 1mm;
- Not affected by noise, steam, dust, vacuum and other working conditions;
- Not subject to changes in medium density and temperature. Process pressure can reach 400bar, medium temperature can reach -200℃ to 800℃;
- There are various installation methods to choose from: Top installation. Side installation. Bypass pipe installation. And waveguide installation;
- Debugging can be selected in many ways: Using programming module debugging , equal to an analytical processing instrument. SOFT software debugging. HART handheld programmer debugging. Debugging is convenient and fast.
Advantages of radar level measurement
- Measurement is not affected by temperature, pressure or dust
- User-friendly adjustment saves time
- Non-contact, continuous level measurement over larger ranges
- Unaffected by sludge and biomass, dust, foam, oil, grease and other coatings, uneven surfaces, turbulence, pressure, and vacuum
- Single frequency radar level sensors for liquid sensing, dual frequency radar level sensors for level measurement of aggregates, gravel, sand, coal, asphalt, and other solids
- Simple mounting and push-button calibration
Radar Level Transmitters Specifications
– 120GHz
| Series |  SI-FMF11 |  SI-FMF12 |  SI-FMF13 |  SI-FMF15 |  SI-FMF21 |
| Applicable medium: | Liquid | Liquid | Liquid | Liquid | Solid |
| Measuring range: | 0.05m~30m | 0.05m~35m | 0.1m~100m | 0.1m~35m | 0.3m~150m |
| Antenna: | 32mm lens antenna | 42mm lens antenna | 78mm lens antenna | 78mm lens antenna | 78mm lens antenna + purging (or without purging) |
| Accuracy: | ±2mm | ±2mm | ±2mm (range below 35m) ±5mm (range between 35m-100m) | ±2mm | ±5mm |
| Medium temperature: | -40～80℃ | -40～110℃ | -40～110℃ | -40～200℃ | -40～110℃ |
| Medium pressure: | -0.1～0.3 MPa | -0.1～1.6MPa | -0.1～0.3MPa | -0.1～2.5MPa | -0.1～0.3MPa |
| Signal output: | Two-wire system/4…20mA/HART protocol Four-wire system 4…20mA/ RS485 Modbus | Two-wire system/4…20mA/HART protocol Four-wire system 4…20mA/ RS485 Modbus | Two-wire system/4…20mA/HART protocol Four-wire system 4…20mA/ RS485 Modbus | Two-wire system/4…20mA/HART protocol Four-wire system 4…20mA/ RS485 Modbus | Two-wire system/4…20mA/HART protocol Four-wire system 4…20mA/ RS485 Modbus |
| Power supply: | Two-wire system/DC24V Four-wire system/DC12~24V Four-wire system/AC220V | Two-wire system/DC24V Four-wire system/DC12~24V Four-wire system/AC220V | Two-wire system/DC24V Four-wire system/DC12~24V Four-wire system/AC220V | Two-wire system/DC24V Four-wire system/DC12~24V Four-wire system/AC220V | Two-wire system/DC24V Four-wire system/DC12~24V Four-wire system/AC220V |
| Shell: | Aluminum/plastic/stainless steel | Aluminum/plastic/stainless steel | Aluminum/plastic/stainless steel | Aluminum /Plastic /Stainless steel | Aluminum/plastic/stainless steel |
| Process connection: | G1½A / 1½NPT thread / flange ≥DN50 | G2A thread/flange≥DN65 | Flange ≥DN80 | Flange ≥DN80 | Flange ≥DN80 |
– 80 GHz
| Series | LM78x0 | LM78x1 | LM78x2 |
| Applicable medium: | For normal solid application | For liquid application | For large range solid application |
| Measuring range: | 0.3 m ~ 60m | 0.08m~30m | 0.6m ~ 120m |
| Antenna: | Lens antenna/ anti-corrosive antenna / flange isolated by quartz | Lens antenna/ anti-corrosive antenna / flange isolated by quartz | Lens antenna/ anti-corrosive antenna / flange isolated by quartz |
| Accuracy: | ±1mm | ±1mm | ±1mm |
| Medium temperature: | T0:-40~85℃; T1:-40~200℃; T2:-40~500℃; T3:-40~1000℃ | T0:-40~85℃; T1:-40~200℃; T2:-40~500℃; T3:-40~1000℃ | T0:-40~85℃; T1:-40~200℃; T2:-40~500℃; T3:-40~1000℃ |
| Medium pressure: | -0.1~2MPa | -0.1~2MPa | -0.1~2MPa |
| Signal output: | 4 ~ 20mA or RS-485 | 4 ~ 20mA or RS-485 | 4 ~ 20mA or RS-485 |
| Power supply: | 15~28VDC | 15~28VDC | 15~28VDC |
| Shell: | Aluminum alloy, stainless steel | Aluminum alloy, stainless steel | Aluminum alloy, stainless steel |
| Process connection: | Thread or flange | Thread or flange | Thread or flange |
– 26 GHz
| Series |  |  |  |  |  |  |  |  |  |
| Applicable medium: | All kinds of corrosive liquid | Slightly corrosive liquid | Corrosive liquids, vapors, volatile liquids | Solid material, Strong dust easy to crystallize, condensation occasion | Solid material, Strong dust, easy to crystallize, condensation occasion | Solid particles, Powder | Hygienic liquid storage, Corrosive container | Rivers, Lakes, Shoal | Rivers, Lakes, Shoal |
| Measuring range: | 10 meters | 30 meters | 20 meters | 70 meters | 80 meters | 30 meters | 20 meters | 30 meters | 70 meters |
| Antenna: | Sealing horn / PTEE | Horn Antenna Φ46mm/ Horn Antenna Φ76mm /Horn Antenna Φ96mm / Special Custom | Internal tapered rod antenna PVDF / 78mm Internal tapered rod antenna PFA / 78mm | Horn Antenna Φ76mm / Φ96mm / Φ121mm/Special Custom | Parabolic antenna Φ196mm /Φ242mm | Horn Antenna Φ76mm / Φ96mm / Φ121mm/Special Custom | Viton / (-40~130) ℃ | Horn antenna with 76mm/ 96mm | Horn antenna with 76mm/ 96mm/ special custom |
| Accuracy: | ± 5mm | ± 3mm | ±3mm | ±15mm | ±15mm | ±15mm | ± 3mm | ± 3mm | ± 10mm |
| Medium temperature: | -40℃~130℃ | -40℃~130℃(Standard type) -40℃~250℃(High-temperature type) | -40℃~130℃(Standard type) -40℃~250℃(High-temperature type) | -40℃~130℃(Standard type) -40℃~250℃(High-temperature type) | -40℃~130℃(Standard type) -40℃~250℃(High-temperature type) | -40℃~130℃(Standard type) -40℃~250℃(High-temperature type) | -40℃ ~ 130℃ | -40℃ ~ 100℃ | 40℃ ~ 100℃ |
| Medium pressure: | -0.1~0.3 MPa | -0.1 ~ 4.0 MPa | -0.1~2.0 MPa | -0.1~4.0 MPa (Flat flange) -0.1~0.3MPa (Universal flange) | -0.1 ~ 0.3 MPa | -0.1 ~ 4.0 MPa (Flat flange) -0.1 ~ 0.3 MPa (Universal Flange) | -0.1~4.0 MPa | Normal-pressure | Normal-pressure |
| Signal output: | 4… 20mA /HART （2-wire / 4-wire） RS485/ Modbus | 4… 20mA /HART（2-wire / 4-wire） RS485/ Modbus | 4… 20mA /HART（2-wire / 4-wire） RS485/ Modbus | 4… 20mA /HART （2-wire / 4-wire） RS485/ Modbus | 4… 20mA / HART (2-wire / 4-wire ) RS485/ Modbus | 4… 20mA /HART (2-wire / 4-wire ) RS485/ Modbus | 4… 20mA/HART (2-wire / 4-wire ) RS485/ Modbus | RS485 / Modbus ( 6~24V DC) 4~20mA / Hart Two-wire ( 24V DC) | RS485 / Modbus ( 6~24V DC) 4~20mA / Hart Two wire ( 24V DC) |
| Power supply: | 2-wire（DC24V）/ 4-wire（DC24V /AC220V） | 2-wire（DC24V）/ 4-wire（DC24V /AC220V） | 2-wire（DC24V）/ 4-wire（DC24V /AC220V ） | 2-wire（DC24V）/ 4-wire（DC24V /AC220V） | 2-wire（DC24V）/ 4-wire（DC24V /AC220V） | 2-wire（DC24V）/ 4-wire（DC24V /AC220V） | 2-wire（DC24V）/ 4-wire（DC24V /AC220V） | (6 – 24V) DC / Four-wire 24V DC / Two wire | (6 – 24V) DC / Four-wire 24V DC / Two wire |
| Shell: | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic /Single chamber | Aluminum / Plastic / Single chamber |
| Process connection: | Thread, Flange | Thread, Flange | Flange | Universal Flange | Thread, Universal Flange | Thread, Flange | Flange | Thread G1½ A″ /Frame /Flange | Thread G1½ A″ /Frame /Flange |
– 6 GHz
| Series |  SIRD-801 |  |  |  |  |  |
| Applicable medium: | Liquid, slightly corrosive liquid | Liquid, especially for corrosive liquid | Liquid, especially with pressure and Volatile Liquid | Solid particles or block material, And it is not suitable for solid powder | Liquid, especially suitable for low dielectric constant, sticky, with mixing liquid | Solid, especially suitable for high temperature conditions |
| Measuring range: | 20m | 20m | 35m | 35m | 20m | 15m |
| Antenna: | The Rod Antenna ( PP/PTFE ) | The Rod Antenna (PTFE) | The Horn Antenna | The Horn Antenna | The Horn Antenna | The Horn Antenna |
| Accuracy: | ±10mm | ± 10mm | ± 10mm | ± 20mm | ± 10mm | ± 20mm |
| Medium temperature: | (-40 ~ 130) ℃ | -40℃~130℃（Standard type） -40℃~180℃（High temperature type） | -40℃~130℃（Standard type） -40℃~250℃（High temperature type） | -40℃~130℃（Standard type） -40℃~250℃（High temperature type） | -40℃~130℃（Standard type） -40℃~250℃（High temperature type） | (-40 ~ 400) ℃ |
| Medium pressure: | (-0.1 ~ 0.3) MPa | (-0.1 ~ 1.6) MPa | (-0.1 ~ 4) MPa | (-0.1 ~ 0.3) MPa | (-0.1 ~ 4) MPa | (-0.1 ~ 0.3) MPa |
| Signal output: | (4 ~ 20) mA/HART | (4 ~ 20) mA/HART | (4 ~ 20) mA/HART | (4 ~ 20) mA/HART | (4 ~ 20) mA/HART | (4 ~ 20) mA/HART |
| Power supply: | Two-wire (DC24V) Four-wire（DC24V / AC220V） | Two-wire (DC24V) Four-wire（DC24V/AC220V） | Two-wire (DC24V) Four-wire（DC24V/AC220V） | Two-wire (DC24V) Four-wire（DC24V/AC220V） | Two-wire (DC24V) Four-wire（DC24V/AC220V） | Two-wire (DC24V) Four-wire（DC24V/AC220V） |
| Shell: | Aluminum /Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel | Aluminum / Plastic / Stainless steel |
| Process connection: | Flange (optional) / Thread | With PTFE plate flange | Flange (optional) / Thread | Universal joint flange | Flange | Flange |
Industrial applications of Radar Type Level Transmitters
Radar level sensors have a very wide range of applications. Almost all media can be measured. This is something other types of meters can only look up to.
It can measure not only spherical tanks and horizontal tanks, but also the liquid level measurement of cylindrical tanks, cylindrical cone tanks, etc.
In terms of tank function, the liquid level in storage tanks, buffer tanks, microwave tubes, and bypass pipes can be measured.
As far as the measured medium is concerned, liquid, particle, slurry, etc. can be measured.
- Steel industry
Production processes:
Coal coking: coal preparation bunker, coke bunker, gas tank, coal tar and crude benzene tank
Sintering plant: sintered material mixing bin, cold return ore, pelletizing bin
Ironmaking plant: ironmaking intermediate warehouse, blast furnace material level, etc.
Working characteristics:
Solid material measurement, strong dust, low dielectric constant, long range.
Volatile crystallization of tar and crude benzene;
High temperature and dust adhesion of blast furnace material level;
Selection application:
Solid measurement is mainly based on high-frequency pulse radar level meter.
Guided wave radar level meter can be used for crude benzene and coal tar.
- Coal industry
Production link: raw coal bunker, pulverized coal bunker, coal gangue storage level, coal washing pool.
Working condition characteristics: typical solid material measurement, strong dust, low dielectric constant. Long range.
Selection and application: high-frequency pulse radar level meter is mainly used.
- Cement industry
Production link: raw material warehouse, raw material homogenization warehouse, clinker warehouse, finished product warehouse, fly ash warehouse, raw coal warehouse, gypsum warehouse, cement slag warehouse
Working condition characteristics: Typical solid material measurement, strong dust, low dielectric constant, long range.
Selection application: High-frequency pulse radar level meter is mainly used.
- Power industry thermal power, hydropower, biological power generation
Production processes:
(thermal power) raw coal and pulverized coal silo, circulating water pool, low and high water level, limestone powder silo, ash hopper material level, ash silo, slag silo, desulfurization tower liquid level
Working characteristics:
Solid material measurement, strong dust, low dielectric constant, long range.
Low water level, high temperature and high pressure;
Desulfurization tower liquid level foam, water vapor, crystallization, spray interference, side loading
Selection application:
The measurement of solid materials is mainly based on high-frequency pulse radar level meters.
High and low water level application of guided wave radar;
The low frequency radar level gauge is commonly used in the desulfurization tower liquid level;
- Non-ferrous metallurgy industry – aluminum, nickel, zinc, and titanium industries
Production processes:
(Aluminum production) slurry tank, dissolution tank, flash tank, post-dissolution tank, flocculation tank, settling tank, decomposition tank, alumina powder silo.
Working characteristics:
Various chemical reaction environments have high temperature, strong water vapor, stirring or corrosion factors
Selection application:
For the influence of high temperature water vapor, refer to factors such as corrosion, measuring range, stirring, and hanging material;
Choose between guided wave radar or low frequency radar level gauge.
High-frequency radar level gauges are still preferred for solids measurements.
- Water conservancy industry
Applications: Hydrological monitoring, flood control alarm, farmland irrigation
Characteristics of working conditions: The signal transmission is far away, the power supply voltage is low, and the installation position is affected by the embankment and dam. The radar wave with small beam angle is preferred.
Selection application: choose high-frequency radar level gauge with MODBUS protocol
- Food and pharmaceutical industry
Production processes:
Edible oil tank, soybean meal storage tank
Working characteristics:
Simple tank environment, or with precision requirements, antenna hygiene requirements in the pharmaceutical and food industries
Selection application:
The high-frequency radar level meter is preferred for the measurement environment with high precision;
If there are hygienic requirements, an antenna with a sealed material that meets hygienic conditions should be selected;
- Industrial petrochemical, coal chemical
Production processes:
Petrochemical: crude oil depot, gasoline tank, diesel tank, natural gas tank, etc.
Coal coke chemical industry: refer to the coal industry
Calcium carbide chemical industry: coal bunker, calcium carbide bunker, etc.
Working characteristics:
Solid material measurement, strong dust, low dielectric constant, long range.
The measurement environment of various oil depots is simple and may have accuracy requirements
There is pressure in the natural gas spherical tank, and the dielectric constant is small
There is oscillating interference echo in gas tank measurement
Various chemical reactor conditions are different
Selection application:
The measurement of solid materials is mainly based on high-frequency pulse radar level meters.
For various oil depots with precision requirements, high-frequency radar is preferred for spherical tanks;
Gas cabinets that are prone to oscillating interference signals also have limited selection of high-frequency radars;
The chemical reactor is selected according to the actual conditions and parameters;
- Environmental protection and water treatment industry
Processing link:
Water collecting well, coarse grid, fine grid, biochemical reaction pool, mud flushing pool, sludge pool, well dissolving medicine pool.
Working characteristics:
Except for ultra-long-range and narrow spaces such as water collection wells, other environments are relatively simple.
Selection application:
The water collecting well can choose guided wave radar or high-frequency radar level gauge according to the range requirements. Generally, ultrasonic level gauges are more commonly used in simple environments.
- Semiconductor industry
Production link: silicon micropowder warehouse
Working condition characteristics: very low dielectric constant, strong dust
Selection application: high frequency radar level meter
Radar Type Level Transmitters Applications
- Liquids with foam, gases (CO2,methane) and other fumes
- Highly corrosive liquids such as acids and solvents
- High temperature applications up to 350F such as asphalt
- Slurries
- Acids, Caustics and Solvents
- Vacuum applications
- Diesel crude oil
- Sanitary applications
- Oil-water interface monitoring and detection
Extended reading: Hydrostatic Level Measurement
Ordering Information
When ordering Radar Type Level Transmitters, we need to consider the following factors:
- Application medium and measuring range:
The physical properties of the liquid medium to be measured have a great influence on the measurement range. Liquids are usually divided into four categories: A, B, C, and D.
Class A: non-conductive liquid, the dielectric constant is less than 1.4, which has a great influence on the measurement distance, and the measurement range is
The circumference is small. such as propane.
Class B: non-conductive liquid, the dielectric constant is about 1.9~4, which has a great influence on the measurement distance.
The volume range is medium. Such as gasoline, oil, etc.
Class C: The dielectric constant is about 4~10, which has little influence on the measurement distance and has a large measurement range. like
Concentrated acid, organic solvent vinegar, ethanol, acetone, oil-water mixture, etc.
Class D: conductive liquid, dielectric constant > 10, little influence on the measurement distance, the most measuring range
big. Such as aqueous solution, diluted acid and alkali, etc. ·
When the liquid surface of the tank is smooth. The measurement range of Class A liquid is 5m. For Class B fluids
The volume measurement range is 10m. Class C liquid 15m. Class D liquids can reach 20m. When the liquid level fluctuates, the corresponding measurement range should be appropriately reduced.
- Process temperature and process pressure
Radar Type Level Transmitters are suitable for high temperature and high pressure measurement. However, the temperature and pressure of the tank need to be clearly confirmed. - Antenna style
The radar level gauge consists of electronic components, waveguide connectors, mounting flanges and antennas.
The shape of the antenna determines the thin focus and sensitivity. Therefore, the choice of antenna is particularly important.
3.1 Flare Antenna
The horn antenna is suitable for most occasions and has the advantages of good focusing, stable physical and chemical properties, durability and firmness. But it is not suitable for the measurement of corrosive media.
3.2 Rod Antenna
Rod antennas are chemically stable, easy to clean and insensitive to condensation. Suitable for corrosive media.
3.3 Under-the-flange antenna
The flange-mounted antenna is mainly used for the measurement of strong corrosive media.
3.4 Parabolic Antenna
The parabolic antenna has good focusing and is not affected by heating steam, and is especially suitable for in-tank measurement of large containers with heating steam, such as the measurement of residual oil, asphalt, etc., and the measurement range can reach 40m.
3.5 Antenna with stilling pipe or bypass pipe
Install a casing for the antenna. The casing is equivalent to a wire that transmits radar signals. It is suitable for occasions where the surface of the medium fluctuates greatly or the dielectric constant is small.
- Display and output signal requirements.
Our Radar Type Level Transmitters are generally configured with local digital displays. A split display can also be configured if required by the customer.
Support 4-20mA, 485 and other signal output. - Installation method and installation size.
Radar Type Level Transmitters support flanged, threaded, bracket mounts. When ordering Radar Type Level Transmitter, customers need to confirm the size with the manufacturer in advance. - Special requirements.
For example, anti-corrosion, explosion-proof, sanitary and so on.
Extended reading: How to convert a 4-20mA to 0-10V /1-5V signal?
Very short microwave pulses with very low energy are transmitted and received through the antenna system. The radar wave runs at the speed of light. The operating time can be converted into level signals by electronic components. A special time extension method can ensure stable and accurate measurement in a very short time.
Electromagnetic waves propagate in the air at the speed of light. The distance between the radar level gauge and the surface of the material can be expressed by the following formula:
D = (1/2)*CT
In the formula:
D ———the distance between the radar level gauge and the surface of the material;
C ———Speed of light
T ———Pulse time.
Then the liquid level is: L = E-D
In the formula:
L — liquid level;
E ———The total height of the tank;
D ———Air height.
Even in the presence of false reflections, the new micro-processing technology and the unique ECHOFOX- software can accurately analyze the level echo. By inputting the size of the container, the distance value can be converted into a signal proportional to the level. The instrument can be debugged with empty positions.
Radar Type Level Transmitters have the advantages of high precision, long life, low maintenance, high performance and so on. Widely used in the industry. Continuous measurement can be performed in harsh environments such as high temperature, high pressure, steam, vacuum and high dust. However, different models of Radar Type Level Transmitters are selected in different environments, and the antennas used are also different.
- Rod antenna
Insulated rod antennas are usually made of polymer materials such as polytetrafluoroethylene and polypropylene. Good corrosion resistance. Can be used in strong acid, alkali and other media.
However, the microwave emission angle is relatively large (about 30°), and there are many side lobes. For the case where the structure of the tank is more complicated. There will be more interference echoes. The signal-to-noise ratio is small and the precision is low.
But easy to clean. It is often used to measure tanks and corrosive media with good operating conditions, large diameters, and small measuring ranges.
If the measured medium is volatile and condensed, it is better to choose a rod antenna or a water drop antenna.
- Flare antenna
At the same frequency, the larger the diameter of the horn, the smaller the emission angle. If it is a high frequency radar level gauge, the emission angle is smaller and the accuracy is higher.
Most economical radar level gauges use microwave frequencies of 5.8GHz or 6.3GHz. Its emission angle is large, and it is easy to generate interference echoes on the container wall or internal components.
Although the horn antenna increases can reduce the emission angle. But the volume increases and the installation is inconvenient. And the improvement is limited.
Using high-frequency radar, the launch angle can reach 8°. This enables high measurement accuracy even when measuring the level of long and narrow tanks.
If it is used in a large-range measurement site, choose a radar level meter with a large horn antenna. Small horn antennas are suitable for small containers.
If the fluidity of the measured medium is poor and there is a phenomenon of hanging material, then choose a horn or a rod radar level gauge.
- Parabolic antenna
This is a new type of antenna that has been introduced recently, and is mostly used in radars that transmit at high frequencies. Because its emission angle is only 7°. Ideal for measuring precise targets and measuring around obstacles.
But its antenna size is large. If the X-band is used, the diameter is up to Φ454mm, and the opening size should be larger than 500mm, which is not very convenient for installation and use.
- Plane antenna
The planar antenna adopts planar array technology. That is, a multi-point emission source. Compared with a single-point emission source, it is measured on a plane. rather than a definite point.
With the corresponding electronic circuit, the measurement accuracy of the radar level gauge can reach ±1mm. It can be used for precision metering of storage tanks. Mainly used for metrology-grade radar level gauges. Planar antennas are suitable for a variety of working conditions.
Extended Reading: FMCW Radar for High Temperature Level Sensor
- Sleeve antenna
When the dielectric constant is small (1.6~3) or the liquid surface produces continuous eddy current or the device in the container causes false reflection, this type of instrument should be selected.
The casing has a focusing effect on the radar wave, and the antenna is installed in the still-pipe or bypass pipe.
The inner diameter of the casing has an effect on the propagation time of the radar wave. Therefore, when setting the parameters, the parameters of the inner diameter of the casing should be set. Compensation for in-travel time.
In addition, this type of antenna requires that the measured medium has good fluidity and is not easy to hang.
If the container under test has a stirring paddle. And the radius of rotation of the blade is almost equal to the diameter of the tank. Then the echo of the radar level gauge will be seriously disturbed. At this time, the still-pipe radar level gauge is used.
- Guided wave radar antenna
Sending and receiving electromagnetic waves through guided metal or cables is a contact measurement.
Because it has little effect on dust, steam, and the adhesion medium on the probe. Therefore, it is more widely used in solid material level and liquid level measurement with small dielectric constant.
The dual-cable guided wave radar level gauge uses the change of measuring capacitance to measure the level of the liquid level. The medium between the two electrodes is the liquid and the gas above it. Suitable for level measurement of corrosive and high pressure media.
Fundamentally solve the influence of temperature, humidity, pressure, material conductivity and other factors on the measurement process. Therefore, it has extremely high anti-interference and reliability.
Coaxial tube radar level gauge is a guided wave radar level gauge equipped with a coaxial tube probe. It is used for liquid level measurement and control of liquids with low dielectric constant or surface fluctuations. Such as If the dielectric constant of the measured material is too low, the general type of radar level meter is not suitable.
Extended Reading: Guided-wave radar (GWR) level transmitter working principle
Most of the time, people don’t think of using radar level sensors as level switches.
The output of radar liquid level sensor is mostly 4-20mA.
However, if the customer’s working conditions require output switching. It can also be customized.
For example, we can add a secondary gauge to the output of the radar level sensor. Convert the current signal into a digital signal.
Extended reading: Float Level Sensors – Single and Multipoint
Radar Type Level Transmitters can be used not only in various tanks. It can also be used in various storage tanks.
Extended Reading: Featured Silo Level Sensors
Different storage tanks have different types of Radar Type Level Transmitters.
A spherical tank, also known as a spherical container, has a spherical shell.
This kind of storage tank is mainly used for the storage and transportation of various gases, liquids and liquefied gases. It is widely used in chemical, metallurgy, petroleum and other industries.
Vaulted tank, also known as vaulted storage tank. It refers to the steel container with the top of the storage tank in the shape of a spherical tank and the tank body in the shape of a cylinder.
This type of storage tank is widely used in the fluid industry, such as the most common type C liquids. In addition, refineries also commonly use vaulted tanks to store diesel fuel, fuel oil, and more.
Floating roof tank, also known as floating roof storage tank. It is divided into inner floating roof tank and outer floating roof tank.
An internal floating roof tank is a floating roof tank with a tank top inside. Its top is a combination of a floating roof and a vault. The inside is a floating roof and the outside is a vault.
The floating roof of an external floating roof tank is a floating roof. It floats on the surface of the liquid storage and floats up and down as the liquid flows in and out. In refineries, these two types of storage tanks are often seen.
Horizontal storage tank. It is mainly composed of tank body, accessories and brackets. It is mainly used in the petrochemical industry for the storage of reaction media, crude oil, petroleum products, etc.
Vertical storage tank. It is mainly composed of foundation, tank bottom, tank wall, tank top and accessories. It is often used as a large oil tank for the petroleum industry. If it is divided by the structure of the tank top, vertical storage tanks can be divided into internal floating roof tanks, external floating roof tanks and vaulted roof tanks.
There are not many types of common measurement tanks for Radar Type Level Transmitters. However, different companies will install some auxiliary equipment inside according to the needs of the work, such as the most common heating coils, agitators, and so on. Therefore, when installing the radar level gauge, not only should pay attention to the shape and size of the storage tank, but also pay special attention to the internal structure.
Extended reading: Industrial Tank level indicators and Tank Level Gauges
More Featured Level Transmitters for Sale
Read more about: Working Principle Of High Temperature And High Pressure Capacitive Level
Frequently
Asked
Questions
Extended Reading: Dielectric constant for radar level transmitter
About Non-Contacting Radar, Emerson also has a very comprehensive introduction. You can refer to this.
Sino-Inst offers over 10 Radar level transmitters for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.
A wide variety of radar level meters options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of radar level measurement instrumentation, located in China.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.