High Frequency Radar Level Transmitter

Short Description:

            Measuring range: 70 m

  • Medium temperature: -40 ℃ ~ 250 ℃
    Process pressure:  -0.1 ~ 0.1MPa
    Accuracy:  ±15mm
    Protection grade:  IP67


Product Detail

Product Tags

The intelligent radar level meter adopts a microwave pulse measurement method and can operate normally in the industrial frequency band range with low beam energy. It can be installed in various metal and non-metal containers or pipelines for continuous measurement of liquids, slurries, and contact. Suitable for situations with large changes in dust, temperature, pressure, and the presence of inert gases and vapors. The radar level meter is harmless to both the human body and the environment, and has the advantages of not being affected by the specific gravity of the medium and not requiring on-site calibration.
1. Introduction
The intelligent radar level meter adopts a microwave pulse measurement method and can operate normally in the industrial frequency band range with low beam energy. It can be installed in various metal, non-metal containers or pipelines to continuously measure the level of liquids, slurries, and particles in a non-contact manner. Suitable for situations with large changes in dust, temperature, pressure, and the presence of inert gases and vapors. The radar level meter is harmless to both the human body and the environment, and has the advantages of not being affected by the specific gravity of the medium, not being affected by changes in dielectric constant, and not requiring on-site calibration. Whether it is for industrial needs or economic considerations for customers, it is a good choice.
2. Working principle
The intelligent radar level meter adopts a microwave pulse measurement method and can operate normally in the industrial frequency band range with low beam energy. It can be installed in various metal, non-metal containers or pipelines to continuously measure the level of liquids, slurries, and particles in a non-contact manner. Suitable for situations with large changes in dust, temperature, pressure, and the presence of inert gases and vapors. No harm to human body and environment, allowing customers to buy smart radar level meters with peace of mind and worth it. High frequency microwave pulses are transmitted and received through an antenna system, while radar waves operate at the speed of light. The running time can be converted into level signals through electronic components. A special time extension method can ensure stable and accurate measurements in an extremely short period of time. Even in complex working conditions with false echoes, the use of microprocessing techniques and debugging software can accurately identify the echoes of material levels.

Input
The antenna receives the reflected microwave pulse and transmits it to the electronic circuit. The microprocessor processes this signal to identify the echo generated by the micro pulse on the surface of the material. The correct recognition of echo signals is completed by intelligent software, with an accuracy of up to millimeter level. The distance D from the material surface is proportional to the time travel T of the pulse
Ratio: D=C × T/2, where C is the speed of light, and since the distance E from the empty tank is known, the material level L is: L=E-D
Output
By entering the empty tank height E (=zero), full tank height F (=full range), and some application parameters to set, the application parameters will automatically adapt the instrument to the measurement environment. Corresponding to 4-20mA output.

3. Application media
Power plant: coal pile, raw coal silo, fuel silo, water storage tank, waste gas purification tank, silo pump, ash silo, oil tank, etc;
Oilfield: crude oil or finished oil storage tanks, three-phase separators, settling tanks, sewage tanks and oil-water interfaces, drilling mud tanks, etc;
Chemical industry: crude oil distillation tower, raw and intermediate material silos, reaction tanks, ammonia tanks, solid material silos, separators, etc;
Metallurgy: ore silos, ore crushers, raw material silos, auxiliary material silos, blast furnaces, alumina powder silos, electrolytic tank buffer tanks, etc;
Cement: stone silo, raw material silo, cement silo, coal powder silo, slag storage silo, etc;
Water treatment: reservoirs, sewage tanks, water treatment tanks, sedimentation tanks, deep wells, drinking water networks, etc;
Paper making: raw material warehouse, storage tower, drying drum, chemical material storage warehouse, etc;
Other industries include quarries, food, pharmaceuticals, environmental protection, shipbuilding, etc.

4. Characteristics
1. Small antenna size; easy to install; Non-contact radar; no wear; no pollution.
2. Almost no corrosion, bubble effect; almost not affected by water vapor in the atmosphere, the temperature and pressure changes.
3. Serious dust environment on the high level meter work has little effect.
4. A shorter wavelength, the reflection of solid surface inclination is better.
5. Beam angle is small, the energy is concentrated, can enhance the ability of echo and to avoid interference.
6. The measuring range is smaller, for a measurement will yield good results.
7. High signal-to-noise ratio, the level fluctuation state can obtain better performance.High frequency is the best choice of detecting the solid and low dielectric media.

High Frequency Radar Level Transmitter06

 

High Frequency Radar Level Transmitter07 High Frequency Radar Level Transmitter08 High Frequency Radar Level Transmitter09 High Frequency Radar Level Transmitter10 High Frequency Radar Level Transmitter11

5 Performance indicators
1. Working frequency: 6.8GHz;
2. Measurement range: Cable type: 0-35m pole type, coaxial type: 0-6m;
3. Repeatability: ± 3mm;
4. Resolution: 1mm;
5. Sampling: Echo sampling 54 times/s;
6. Response speed:>0.2S (depending on specific usage);
7. Accuracy:<0.1%;
8. Output current signal: 4-20mA;
9. Communication interface: Hart communication protocol;
10. Process connection: G1-1/2, G3/4 flange: DN50, DN80, DN100, DN150;
11. Process pressure: -1~60bar;
12. Power supply: 24VDC (± 10%) ripple voltage: 1Vpp;
13. Power consumption: max22.5mA;
14. Environmental conditions: Temperature: -40 ℃~+250 ℃;
15. Shell protection level: IP68;
16. Explosion proof level: ExiaIICT6;
17. Two wire wiring: The instrument power supply and signal output share a two core cable;
18. Cable entry: M20 × 1.5 (cable diameter 5-9mm).

6. Measurement precautions
1. The measurement range starts from the point where the beam touches the tank low, but in special cases, if the tank low is concave or conical, measurement cannot be carried out when the level is below this point.
2. If the medium has a low dielectric constant and is visible at a low liquid level, it is recommended to set the zero point at a low height of C to ensure measurement accuracy.
3. In theory, it is possible to measure the position of the antenna *, but considering the effects of corrosion and adhesion, the final value of the measurement range should be at least 100mm away from the * of the antenna.
4. For overflow protection, a safe distance can be defined to be attached to the blind spot.
5. The small measurement range of zui is related to the antenna.
6. With different concentrations, foam can both absorb microwave and reflect it, but it can be measured under certain conditions.
7. When the measurement range is exceeded, the instrument output is 22mA current.


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