【Non-toxic Materials】Our water level sensor uses non-toxic plastic materials, which will not pollute the medium during use 【Principle Of Operation】The front floating head of the liquid level sensor will float at different angles according to the liquid level, and then transmit information with electrical to turn on/off pumps, indicators, alarms or other equipment 【Widely Applications】It is an excellent auxiliary tool for monitoring the water level of hydroponics, salt water tanks, fresh water tanks, gardening, aquariums used for power head control, pet bowls, fish tanks, filtration, heating, etc. 【Adjustable Operation】The sensor can sense the liquid level in the storage tank, and can be installed as a normally closed/normally open switch according to needs with switches, indicators and other equipment 【Specification】Cable length: 40cm / 15.76"--Float length: 85 mm / 3.35"--Switching voltage (Max): 100V DC--Switching current (Max): 0.5A--Contact rating (Max): 10W