The Water Level Sensor ELectrode automatically monitors high alarm, quick fill and safe off functions. Electrodes are 40mm adjustable in height for on site adjustment. The assembly has a compact design for thin wall installation and concealed view, as no moving parts and can detect up to 3 water levels. Low voltage for safety. To be used in conjunction with the WLC-1000 series water level controller for controlling solenoid valves or any other requirement..