Vega Vegapuls WL 61 radar sensor for water and sewage

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The Vegapuls WL 61 radar sensor has been developed especially for the area of water and sewage systems as an alternative to the commonly used ultrasonic sensors and hydrostatic pressure transmitters.

Radar offers advantages over ultrasonics in that it is independent of temperature influences, wind movements, fog or rain. And due to their high sensitivity, radar sensors can detect the water level under a thin layer of foam.

In flow-rate measurement in open channels, a radar sensor is also more accurate than an ultrasonic device because temperature has an especially strong influence due to the small measuring ranges. With ultrasonic sensors, a measurement error of more than 20% can arise very quickly due to solar radiation on the transducer.

The tightly encapsulated cable and robust housing make a high-protection rating of IP66/68 (1 bar) possible. With different available mounting options, the sensor can be easily integrated into existing infrastructure.

The measurement data can be transmitted either directly to an existing control system or to a signal-conditioning instrument that provides suitable relays for pump control. Linearisation curves can be stored directly in the sensor, which allows, for example, direct indication of the flow rate in open channels.

The measuring range of the sensor is 0-15 m, and the operating temperature range is -40 to +80°C. Outputs are 4-20 mA/HART, Profibus PA and Foundation fieldbus.