DEFlow rate in open channels
Measurement of effluent
The quantity of effluent that enters a sewage plant is an important criterion for effective control of the complex system. It determines the amount of air needed in the aeration basin. The air controls the activity of the bacteria that break down the contaminating substances. To keep the sensors from getting soiled due to the high solid content of the waste water, a non-contact measurement of the flow volume is usually recommended.
Non-contact level measurement with VEGAPULS WL 61
The radar sensor VEGAPULS WL 61 is able to measure the level in open channels with very high precision. Since the measurement is completely unaffected by temperature fluctuations, air movements and light foam generation on the liquid surface, VEGAPULS WL 61 represents the optimal solution for this application.
Data conditioning with VEGAMET 391
VEGA offers the compact signal conditioning instrument VEGAMET 391 for direct on-site processing of the flow-rate data. Beside the relay outputs, there is a totalizer for flow-rate measurement and a generous data memory. VEGAMET 391 is equipped with an analogue current output, as well as digital interfaces for measurement data transmission.
» VEGAPULS WL 61
| Measuring range | up to 15 m |
| Process fitting | DN80, mounting strap or flange |
| Process temperature | -40 … +80 °C |
| Process pressure | -1 … +2 bar (-100 … +200 kPa) |
| Measuring precision | ±2 mm |
» VEGAMET 391
| Input: | 1 x 4 … 20 mA/HART sensor input |
| Outputs: | 1 x 0/4 … 20 mA current output 6 x level relay 1 x fail safe relay |