RQ-30d
Contactless discharge / flow measurement for wide rivers with inhomogeneous distribution of flow velocity
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In a system configuration of one master-radar sensor and several slave-radar sensors, the velocity is measured at several points throughout the whole water cross-section. This system guarantees very high accuracy of the discharge measurement even for very wide water bodies.
The main advantage of the RQ-30D is that the discharge can be measured more precisely, especially in rivers and streams where the flow velocity is distributed inhomogeneously over the cross-section. Varying velocities can be observed in very broad streams and in situations where the measuring site is located close to a river bend, an incoming river or river locks.
In order to capture the complete flow-profile even more accurately, the RQ-30D system measures multiple individual flow velocities dispersed over the width of the body of water.
- Discharge measurement with high accuracy – ideal for very wide rivers with inhomogeneous velocity distribution
- One water level measurement and multiple individual velocity measurements
- Proven RQ-radar technology, contactless measurement, maintenance free system, flood-proof
- No structural work necessary in the water
- Recognition of flow direction an hysteresis effects
- Measurement in tidal waters
- Measurement in backwater situations
- Measures even where weed growth prevails and sensor is not affected by turbidity
- Measuring range from +/- 0.10 to +/- 15 m/s (depending on the flow conditions)
- Analogue outputs from 4 to 20 mA (optional)
General | |
Dimensions: | Master: 338 x 333 x 154 mm Slave: 175 x 154 x 246 |
Total weight: | Master: 5,4 kg Slave: 2,7 kg |
Protection: | IP 67 |
Power supply: | 6...30 V |
Power consumption at 12V: | standby approx. 1mA; active operation approx. 140mA |
Operating temperature: | -35...+60 °C |
Distance to surface: | 0,50...35 m |
Miscellaneous: | integrated lightning protection |
Waterlevel measurement | |
Measurement range: | 0...15 m standard version / 0...35 m extended version |
Accuracy: | +/- 0,01 m/s; +/- 1 % FS |
Resolution: | 1 mm/s |
Radar frequency: | 26 GHz (K-Band) |
Radar opening angle: | 10° |
Velocity measurement | |
Measuring range: | 0.10...15 m/s (depending on flow conditions) |
Accuracy: | +/- 0.01 m/s; +/- 1 % FS |
Resolution: | 1 mm/s |
Direction recognition: | +/- |
Measuring duration: | 5...240 sec. |
Measuring interval: | 8 sec. ...5h |
Measuring frequency: | 24 GHz (K-Band) |
Radar opening angle: | 12° |
Distance to water surface: | 0,50...35 m |
Minimum swell needed: | 3 mm |
Automatic vertical angle compensation | |
Accuracy: | +/- 1° |
Resolution: | +/- 0,1° |
Interface | |
Interface: | 1x SDI-12 1 x RS 485 or Modbus |
Transfer rate: | 1.2...19.2 kBd |
Protocol: | diverse ASCII-protocols |
Output: | discharge rate, flow velocity, waterlevel, quality parameters |