This is the simplest Basic water level Controller with indicator it is the most economical and energy efficient product from Sri Digitek, Two sump levels, Two over head tank indication. Flow, motor on, dry run, power on. Features: The water level controller can switch on or switch off the pump, to maintain the pre defined water level at the storage tanks.Low AC Voltage sensing circuit to avoid polarization of electrodes in water. These special stainless steel plastic molded conductive electrodes are Long life sensors and do not require frequent cleaning or replacement.