https://instrumentationtools.com/multiple-pumps-control-using-plc/LOOKING FOR PROGRAM TO CONTROL 4 LIFT STATION PUMPS FOR A UNI
Original poster seems not replying... Doing some efforts for no reply can be like pouring water on sands...Use 1 pump in and 1 pump out, both run by VFDs. Control the VFDs with PID loops. You should be able to keep the level fairly stable that way.
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