2-Wire Radar Level Transmitter – RD900


isolvThe extremely narrow microwave pulse emitted by the antenna on radar level transmitter can travel at the speed of light and part of its energy, which is reflected off the surface of the target medium, is received again by the same antenna. The time lapse between pulse emission and reception by the antenna is proportional to the distance between the surface of the target medium and the reference point on the antenna.

However, due to the fact that the electromagnetic wave is transmitted at extremely high speed, which leads to a short time lapse (nanosecond level) and makes it difficult to be identified, radar level transmitter have adopted a special demodulation technology, enabling itself to detect the time lapse between pulse emission and reception correctly, and eventually generate accurate measurement results.

  • Non-contact measurement
  • Easy set-up and installation
  • High accuracy
  • Unaffected by dust generation
  • Loop-Powered (HART Available)
  • ATEX Approval (Ex ia)

Equipped with advanced microprocessor and unique Echo Discovery echo processing technology, the
radar level transmitter can be used under various process conditions for solid level measurement.

rd900_appimgContinuous level measurement in powders and solids:

  • Cement
  • Coal
  • Iron ore
  • Fly ash
  • Plastic granular
  • Lime slurry
  • Pulp & paper
  • Corn, soybean, flour


Maximum Measurement Range 70 m
Measurement Accuracy ±15mm
Process Temperature -20 to 120ºC
Process Pressure -1 to 40 bar (Not applicable for sensor with gimbal option)
Frequency Range 26 GHz
Signal Output 4 to 20 mA / HART
Fault Signal Constant current output: 20.5mA / 22mA / 3.9mA
Power 2-wire (16 to 26 VDC)
Power Consumption Max. 22.5mA
LCD Display (Programmer) Optional
Material Stainless Steel
Housing Stainless Steel
Seal ring between housing and housing cover Silicone
Cable Entry/Plug One cable entry of M20x1.5 (cable diameter of 5 to 9m)
One binding of M20x1.5
Flange Accessories Stainless steel gimbal flange
Antenna Stainless steel ø196
3dB Beam Angle
Ex Approval(ATEX): Ex ia IIC T6...T3 Ga
Ex ia IIIC T76˚C... T146˚C Da

Measurement Accuracy


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