Hospital Wastewater Tank Ultrasonic Level Measurement

When a Southwest hospital needed reliable level measurement of their wastewater tanks, they turned to Flowline. The hospital cleans 250k lbs. of laundry a week through twelve commercial machines. After each cycle, the machines pump filtered wastewater into holding tanks, awaiting transfer to treatment. There an integrator was hired to configure their pump control logic. He then realized that the DL14 ultrasonic sensor measured great when the level was in the straight side wall, but became unstable as it dropped into the cone. Once he understood why, he said, “I need to reliably measure the upper 2/3 of each tank, actuate the pumps when the tanks are full and turn them off when the level drops into the cones. What are my options?” After some discussion, he chose to span the straight side walls, and turn the pumps off 3 seconds after the level drops below each span. While not elegant, it works well and avoided a costly system redesign. The ultrasonic sensors provide reliable level data to the PLC, which monitors and controls the pump transfers. Flowline is reliable level measurement.