Liquid Level Detection

Louis Bybee · 2003-10-16T01:37:41+00:00

I recently finished the startup on a Waste Water Reclaim System. Most of thesystem came up rather uneventfully with the exception of the gray waterstorage tank. It had a tendency to form froth on the liquid surface.Accurate liquid level detection in this tank is important for stable systemperformance.An ultrasonic level detector was factory installed.It became apparent rather quickly that the sensor was detecting the froth,and the resulting false reported liquid level in the tank was responsiblefor frequent cycling, and system shut down.I solved the issue in the short term by installing a large cylinder in thetank, centered under the sensor, with holes in the lowest portion. Thatallowed system startup, and tuning, to be completed.My question is the availability of a non-contact sensor that will detecttrue liquid level through foam, or froth?Thank you.Louis--*********************************************Remove the two fish in address to respond