ITEM NAME:Stainless Steel Breaking Water Level Sensor Horizontal Float Switch I5C4 Stainless Steel Breaking Water Level Sensor Horizontal Float Switch I5C4 A float switch is a device used to sense the level of liquid within a tank. The switch 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, pumps, ponds, basement alarms, boats, air