HKCE's Battery Operated roof Tank Full and Empty Indicator Alarm of Loud Dual Tone 120db with Variable Volume

The device gives alarm when the tank is full and empty(upper level and lower level) and is safe, shock free and battery operated and automatically gives loud dual tone alarm (volume can be varied through knob) when water level reaches near the upper level. It also gives such alarm when water level reaches below lower level. In this product sensor does not stop working even when mud and impurities start accumulating on it.