Can be used to detect the level of liquid in a tank, easy to operate. A float switch is a device used to detect the level of liquid in a tank, it can operate a pump , indicator, alarm, or other device. Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for water quality control. power head, pet bowls, aquariums, filtration, heating, etc. This liquid float switch can be installed as a normally closed/normally open switch according to your needs. Switching voltage (max): 100V DC; Switching current (max): 0.5A material: plastic Contract level (max): 10W Switching voltage (max.): 100 V DC Switching current (max): 0.5A Carrying current (maximum): 1A Resistance to contraction (max): 100 OHM Temperature class: -30~+125 degrees Celsius feature: Simple structure. long lasting. Easy to use. A float switch is a device used to sense the level of liquid in a tank, which can activate a pump, indicator, alarm, or other device. Use with the hydroponics, saltwater tanks,