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. You can use them with hydroponics,saltwater tank,freshwater tank, gardening,aquariums compatible with power head control,pet bowls,fish tanks,filtration,heating or what ever your project may be. Using high?quality stainless steel materials, strong and durable, has a long service life. 4. This stainless steel float switch is compact and easy to install. 5. Professional manufacture ensures you higher quality products, you can buy it with ease. Specification: Thread Dia(Approx): 21mm, 1/2'PT Thread Length: 15mm/0.59" Screw Size: G1/2 DN15 1/4 Contract Rating(Max): 10W Switching voltage(Max): 110VDC Switching Current(Max): 0.5A Breakdown Voltage(Max): 220VDC Carry Current(Max): 1.0A Contract Resistance(Max): 100 OHM Temperature Rating: -30~+125 Material: Stainless Steel Contract Rating(Max):10W; Switching voltage(Max):110VDC Carry Current(Max):1.0A; Contract resistance(Max):100 OHM Package Include: 1x Side Mount Stainless Steel Float Switch