Pump controls manage fluid circulation, liquid levels, and flow rates in systems where heavy-duty pumps run. Circulator controls make sure liquid circulates through systems according to predefined settings. Level sensors measure and monitor liquid levels in drums, tanks, and bottles. Flow sensors keep pumps operating at a specified flow rate. Flow switches redirect liquids to a backup pump when the flow rate drops. Float switches and flowmeters monitor liquid levels and protect pumps from running dry.