uxcell 25mm Mini PP Tank Pool Water Level Liquid Sensor Vertical Float Switch

Description: 1.Brand new and high quality. 2.Can be used to sense the level of liquid in a tank. 3.Can activate a pump, an indicator, an alarm or other device. 4.Use it with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, or what ever your project may be Contains. 5.Normal Open(NO): Reed Switch Stay Open, When Liquid in Low Level.    Normal Close(NC): Reed Switch Stay Closed, When Liquid in Low Level.