Feature 1Compact size, easy to be installed 2Sense the liquid level within a tank to turn on/off a pump, an indicator , an alarm or other device 3Can be installed as normally closed/open switch according to your needs 4It can be used with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating; but must make sure your project Contains no mercury before you use it 5Switching voltage (Max): 100V DC; Switching current (Max): 0.5ASpecificationFeatures: Compact size, easy to be installed. Sense the liquid level within a tank to turn on/off a pump, an indicator , an alarm or other device. Can be installed as normally closed/open switch according to your needs. It can be used with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating; but must make sure your project Contains no mercury before you use it! Switching voltage (Max): 100V DC; Switching current (Max): 0.5A. Specification: Material: Plastic Size: 8.7cm * 3cm Color: Black 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 Package List: 1 * Liquid Float Switch