Level Controller Provides Solution for Pump Station Call-Outs

Not long after startup in two new lift stations, Rick McKinnon, public works supervisor for the town of Eckville, Alberta, became aware of some problems. He and his team were receiving callouts from false high-level alarms.

They investigated and experimented with baffles and stilling wells, attempting to reduce the periodic build up of foam and grease that most likely was causing the ultrasonic sensors to lose echo in the pump stations.

Finding a Solution

Carbon Controls in Calgary, Alberta, recommended the Greyline PSL 5.0 Pump Station Level Controller. The PSL 5.0 is designed to operate with both a noncontacting ultrasonic sensor plus a generic 4-20 mA level signal from a redundant sensor.  

The transition from primary ultrasonic to redundant level signal is seamless, and transfer to the redundant signal is displayed to the operator with usage hours logged for troubleshooting. The PSL 5.0 also features six programmable relays with alternation modes, and a pump run-time report. Using the pump run-time reporting function, McKinnon can spot pump problems before they fail and plan pump maintenance.

Immediate Results

No more callouts. Having a redundant level-monitoring method within a single meter allows for seamless operation in the case of temporary loss of the ultrasonic signal, and there will be no trips of the high-level alarm resulting in futile maintenance visits.


Greyline is a worldwide leader in ultrasonic instrumentation for industrial and environmental markets. The company develops, manufactures and markets industrial flow- and level-monitoring instruments including ultrasonic level transmitters, flowmeters and open-channel flow meters. For more information: 613/398-8956 • info@greyline.com • www.greyline.com



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