| Customization: | Available |
|---|---|
| Principle: | Radar Level |
| Range: | 0-150m |
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High Temperature Solid And Liquid 80ghz Radar Level Transmitters FMW21 RS485 Modbus 150m
Principle
The general principle of the FM continuous wave radar level gauge is that the radar emits electromagnetic
waves on the top of the tank, and the electromagnetic waves are received by the radar after being reflected
by the medium. The frequency difference δf between the received signal and the transmitted signal is
proportional to the distance R from the surface of the medium: R=C (speed)*δf (frequency difference)/2/K
(frequency modulation slope). Because the speed of light C and the frequency modulation slope K are
known, the frequency difference δf can be estimated to obtain the distance R from the radar installation
position to the material surface, and then through the known total height of the tank, subtract the spatial
distance from the radar to the material surface (referred to as Empty height) to get the height of the material
level.
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