Features: *A float switch is a device used to sense the level of liquid within a tank. It may actuate a pump, an indicator, an alarm, or other device. *Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating etc. *Working theory: * or more reed tubes are mounted in a closed, non-permeable tube. *Multiple installation methods: thread, flange, chuck, etc., *It can also meet the different needs of various environments; *Lightweight. *Apply to many fields: water treatment, food, medicine, chemical industry, electronics, shipbuilding and other industries. Specification: Material: SUS, PP, PVC, PVDF, etc Color: Black Working voltage: 0-110（V） Working current: 0.5 (A) Contract rating (Max): 10W Switching voltage (Max): 100V DC Switching current (Max): 0.5A Breakdown voltage (Max): 220V DC Carry current (Max): 1A Contract resistance (Max): 100O OHM Temperature rating: -30 ~ +125 Celsius degree Package Contents: 2* Water Level Switches Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. *Then the tube is passed through or more of the hollow and internally floating magnets. *The rise or fall of the liquid level causes the floating ball to move together, thereby causing the reed switch in the non-permeable tube to be actuated to open or close and output a switching signal. *Simple theory. Stable and reliable performance. Long working life; *All imported dry reed pipes are used, and the contact life can reach 1 million times; *The reed switch and lead are completely isolated from the measured medium, and can be used reliably under high temperature and high pressure;