It uses a Float switch.. The waves in the sump make it stop and start. I am thinking of putting a pneumatic time delay relay. Let me know what you think and any other ideas you think could work better
A sump has a wide deadband level switch that turns the pump on at the high point, latches the contact to keep the pump running until the level hits the low point where the control contact changes state, the pump stops and the control contact latches in the OFF position until the level switch reaches the high level point.
If the switch contact is not latching open once the pump gets to the low state, then there's something wrong with the low position sensing function or the latching function.
If this float switch has a limited operating range, then you may need to either find another model of float switch with a much wider operating band, or else switch out to a dp cell type level transmitter. If this sump is open to the atmosphere, then a dp cell in level service is equivalent to a low range pressure transmitter. For a PT or LT, to avoid weeds, suspended solids and/or bugs from getting into the impulse line, ask for a diaphragm sealed impulse line.
