Water level radar sensor RL-15 / RL-35

The RL-15 / RL-35 is a highly accurate measuring device to measure the surface water level without direct contact to the medium.

  • General
  • Technical data
  • Documents
  • Video
  • Images
  • Contact-free, maintenance free system
  • Measurement range: 15 m resp. 35 m
  • Near blanking zone: 0.5 m
  • High accuracy: +/- 2 mm
  • Compact design
  • Independent of environmental influences (e.g. temperature, wind)
  • Easy integration into existing systems
  • Vandalism secure design does not attract attention
  • Interfaces: 4 to 20 mA, SDI-12 is available as an option
The so-called pulse procedure sends a short microwave impulse to the water surface. Afterwards the sensor remains in standby for a short time. Within this time the water reflects the pulses to the integrated evaluation system. The run time of the impulses corresponds directly to the distance to the current surface water level.


Dimensions 153 mm x 325 mm x 200 mm
Total weight 3 kg
Measurement frequency 26 GHz (K-Band)
Power supply  from 9.6 to 36 V
Operating temperature -40 to +80 °C

Measurement range  from 0 to 15 m (standard); 0 to 35 m
Resolution 1 mm
Accuracy +/- 2mm
Near blanking zone 0,5 m
Holdback time 60 s after power on
Step response time < 3 s (after a sudden change in a measured distance to max. 0,5 m)
Output 4 to 20 mA = 0 to 15 m or 0 to 35 m
RL-15 / RL- 35 Non-contact Water Level radar RL-15 / RL- 35 ProductLeaflet_RL_15_35_EN.pdf 

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Water level radar sensor RL-15 / RL-35
Water level radar sensor RL-15 / RL-35
Water level radar sensor RL-15 / RL-35
Radar sensor RL-15 for contact-free and continious monitoring of the actual water level
Water level radar sensor RL-15 / RL-35
Dimensions of RL-15