RQ-30L
RQ-30L – Contactless discharge/flow measurement with the option to use and integrate external water level data
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Innovative radar sensor for contactless discharge measurement of rivers, open channels and canals. The RQ-30L is mainly applied where existing measuring sites (e.g. gauging sites) require a quality upgrade without a large investment.
While the water level can be measured as before, the radar sensor improves the accuracy by additionally determining the surface flow velocity. Therefore the RQ-30L is a very effective extension to all sites where the water level should (or must) be measured by a separate instrument other than the RQ-30.
- Discharge measurement by means of innovative radar technology and via the integration of external data (water level and cross section profile)
- Upgrading of existing measuring sites with additional surface velocity measurement
- Proven RQ radar technology: contactless measurement, maintenance-free system, flood-proof
- No structural work is necessary in the water
- Recognition of flow direction and hysteresis effects
- Measurement in tidal waters
- Measurement in backwater situations
- Measures even where weed growth prevails and in waters with high turbidity
- Measuring range from +/- 0.10 to +/- 15 m/s (depending on flow conditions)
- Analogue outputs 4 to 20 mA (optional)
| General | |
| Dimensions: | 175 x 154 x 246 mm |
| Total weight: | 2,7 kg |
| Protection: | IP 67 |
| Power supply: | 6...30 V |
| Power consumption at 12V: | standby approx. 1.5 mA; active operation approx. 140 mA |
| Operating temperature: | -35...+60 °C |
| Distance to water surface: | 0,50...35 m |
| Miscellaneous: | integrated lightning protection |
| Surface velocity measurement | |
| Measurement range: | 0.10...15 m/s (depending on flow conditions) |
| Accuracy: | +/- 0,01 m/s; +/- 1 % FS |
| Resolution: | 1 mm/s |
| Measurement duration: | 5...240 sec. |
| Measurement interval: | 8 sec. ...5h |
| Measuring frequency: | 24 GHz (K-Band) |
| Radar opening angle: | 12° |
| Distance to water surface: | 0,50...35 m |
| Necessary minimum swell: | 3 mm |
| Automatic vertical angle compensation | |
| Accuracy: | +/- 1° |
| Resolution: | +/- 0,1° |
| Interface | |
| Interface: | 1 x SDI-12; 1 x RS 485 or Modbus; |
| transfer rate: | 1.2...19.2 kBd; protocol: various ASCII-protocols |
| output: | - discharge rate - flow velocity - water level - quality parameters |
| Input (water level values): | 4...20 mA current or 0...2.5 V voltage |
| Output: | 3x analogue outputs, 4...20 mA; for: - water level - flow velocity - discharge rate |