NON-CONTACT DISCHARGE RADAR RQ-30 / RQ-30A

  • Non-contact, maintenance free measurement system
  • No structural work is necessary in the water
  • No threat to the system through flooding
  • Low power consumption enables operation using solar cells
  • Recognition of flow direction
  • Measuring range from +/- 0.10 to +/- 15 m/s (depending on the flow conditions)
  • Recognition of hysteresis-effects
  • Measurement in backwater situations
  • Measures even where weed growth prevails and sensor is not affected by turbidity
  • Measurement in tidal waters
  • Automatic angle measurement
  • Optional (RQ-30a): analogue outputs from 4 to 20 mA
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Description

NON-CONTACT DISCHARGE MEASUREMENT BY MEANS OF RADAR TECHNOLOGY FOR OPEN RIVERS

The RQ-30 is a sensor for continuous discharge measurement of rivers, open channels and canals with known cross-section profile. The sensor uses innovative radar technology to measure velocity, water level and discharge. It enables reliable, non-contact measurement without the need for structural work in the water.

 

Specifications

GENERAL

  • Dimensions 338 mm x 333 mm x 154 mm
  • Total weight 5.4 kg
  • Protection class IP 67
  • Power supply 6 … 30 V
  • Power consumption at 12V standby approx. 1mA; active operation approx. 140mA
  • Operating temperature -35 … 60°C
  • Miscellaneous over voltage protection, reverse power protection, lightning protection

WATERLEVEL MEASUREMENT

  • Measurement range 0 … 15 m standard version / 0 … 35 m extended version
  • Resolution 1 mm
  • Radar frequency 26 GHz (K-Band)
  • Radar opening angle 10°

VELOCITY MEASUREMENT

  • Measurement range 0.10 … 15m/s (depending on flow conditions)
  • Accuracy +/- 0.01 m/s; +/- 1 % FS
  • Resolution 1 mm/s
  • Direction recognition +/-
  • Measurement duration 5 … 240 sec.
  • Measurement interval 8 sec. … 5h
  • Measurement frequency 24 GHz (K-Band)
  • Radar opening angle 12°
  • Distance to water surface 0.50 … 35 m
  • Necessary minimum wave height 3 mm

AUTOMATIC VERTICAL ANGLE COMPENSATION

  • Accuracy +/- 1°
  • Resolution +/- 0.1°

INTERFACE

  • Analogue Output (RQ-30a) 4 x output 4 – 20 mA for water level, velocity, discharge and AUX
  • Digital Interface 1 x SDI-12; 1 x RS 485 or Modbus
    • Transfer rate: 1.2 to 115.2 kBd
    • Protocol: various ASCII-protocols
    • Output: water level, velocity and discharge, quality parameters

PDF catalogue

ProductLeaflet_RQ-30_EN

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