water level switch ,safe ,stable and reliable ,prolonged antifouling power 1.Model No.: VTW24012.Material: Plastic3.Size: 150x20mm4;Three core cable: the voltage of the red and blue core is DC24V,the white core is 24V/0V.5.When water is sensored,The output will be 24V.When there is no water ,it will be 0V,it can drive a 24V midget relay6/.OEM is available. Welcome your inquiry .