AC Sensing type Water Level Controller switches on the pump when the water in the over head tank drops down below the preset low level and puts off the pump when the water level rises above the preset high level. The Controller can effectively control water level in the sump. The Water Level Controller utilises AC sensing technology and requires 230 VAC to operate efficiently. AC Sensing type Water Level Controller is offered in a size range of 160 mm [H] X 175 mm [W] X 60 mm [D].