Geolux RSS-2-300 W Surface Velocity Radar

The Geolux RSS-2-300 W flow meter uses radar technology to provide precise, contactless measurement of surface flow velocity. Contactless radar technology enables quick and simple sensor installation above the water surface, and requires minimum maintenance.

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SKU: RSS-2-300W Categories: , , ,
SS-2-300 W flow meter is used to monitor flow velocity of open channels such as rivers, irrigation channels or sewer systems, and for monitoring and control of hydropower plants and wastewater treatment plants. The flow meter is also suitable for various mass flow metering applications in mining processing plants, industrial installations, and, due to operation without moving parts and robust mechanical design, is ideal for measurement of flammable fluids and harsh chemical applications.
The radar operates in the K-band (at 24.125 GHz), and provides 20 flow speed readings per second over serial (RS-232, RS-485) and CAN interfaces. A variety of supported communication interfaces and protocols enable easy integration with existing telemetry equipment and SCADA systems. The integrated tilt sensor measures inclination angle of the sensor and the flow velocity measurement is automatically cosine-corrected according to the measured mounting tilt angle.

Geolux RSS-2-300 W radar sensor is certified according to both European and American standards, and is being used worldwide.


  • Contactless flow measurement
  • Operates in the K-band (24.125 GHz)
  • Wide measurement range from 0,02 m/s to 15 m/s
  • Long range operation up to 50 m
  • Low power consumption (max 1,35 W, typically 1 W)
  • 9 to 27 VDC input voltage range
  • IP68 aluminum casing
  • RS-485/Modbus, RS-232 and CAN communication interface support
  • Optional SDI-12 interface support
  • Automatic mounting tilt angle compensation
  • Easy pole, wall or enclosure mounting
  • Operating temperature range from -40 °C to +85 °C (-40 °F to +185 °F)


  • Radar TypeK-band 24.125GHz Doppler radar, 21 dBm EIRP
  • Beam Angle
12° Azimuth
24° Elevation
  • Detection Distance
50 m (radar beam to water)
20-25 m (height above the water)
  • Speed Range 0,02 m/s to 15 m/s
  • Resolution 0,001 m/s
  • Accuracy 1%
  • IP Rating IP68
  • Power Input 9 to 27 VDC
  • Power Consumption <1,35 W (typical 1,0 W)
  • Maximal Current < 250 mA
  • Temperature Range -40°C to +85°C (without heating or coolers)
  • Device Outer Dimensions 110mm x 90mm x 50mm
  • Serial Interface
1 x serial RS-485 half-duplex
1 x serial RS-232 (two wire interface)
  • Baud Rate 1200 bps to 115200 bps
  • Serial Protocols Modbus/RS-485, GLX-NMEA, ASCII-S other available on request
  • SDI-12 Interface Available as optional add-on module
  • Connector M12 circular 12-pin


Ordering information  

RSS-2-300 W


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