SIEMENS SITRANS LR140 Radar Level Transmitter


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Siemens SITRANS LR140: An innovative W band FMCW radar level transmitter, housed in a chemically resistant enclosure featuring a PVDF sensor, ensuring years of dependable and trouble-free measurement service.


Powered by a 4 to 20 mA loop, this transmitter delivers precise level measurements with a range of up to 8 meters (26 feet). Its non-intrusive measurement capability allows for easy installation through plastic vessel tops. Plus, programming is a breeze with Bluetooth connectivity, enabling seamless setup via the SITRANS mobile IQ application on your smart device.

  • Bluetooth connectivity for easy setup with SITRANS mobile IQ.
  • Chemically resistant PVDF sensor.
  • W band FMCW radar yields narrow beam with small antenna for superior performance in short range applications.
  • Approved for open air applications outside of a tank.
  • Compact design fits in limited space installations.

Product Data Sheet – Siemen SITRANS LR140 Radar Transmitter

Operation Manual – Siemen SITRANS LR140 Radar Transmitter


Application Radar Level Transmitter

(Measuring Range)

0 … 8 m (0 … 26 ft)
Output 4 … 20 mA
Measuring Accuracy ± 5 mm
Operating conditions ‑1 … +3 bar (14.50 … 43.51 psi g)

‑40 … +60 °C (‑40 … +140 °F)

Degree of Protection IP66/IP67
Weight 0.5 kg (1.1 lb)
Electrical Connections M20
Explosion Protection IECEx (Dependent on Configuration)
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SIEMENS SITRANS LR140 Radar Level Transmitter

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