The float switch is a device used to detect the liquid level in a tank. The switch can control a pump, indicator, alarm, or other device. Use them with hydroponics, saltwater aquarium, water tank, gardening, aquariums for power control, pets, fish tanks, filtration, heating, pumps, ponds, basement alarms, boats, reef aquariums, liquid control, ice makers, coffee makers, marine, automotive, cars, tropical fish tanks, evaporator coils, condensate line, relays, or whatever. Note: the current that the switch can carry is small (0.5A), you must use a relay or a contactor when connected with a load, relay and contactor are not included here. Thread Diameter: 9.5mm Thread Length: 39cm/15.35inch Float Ball Size: 55 x 17mm/2.2inch x 0.67inch (L*D) Max Switch Voltage: 220V Max Switch Current: 0.5A Max Breakdown Voltage: 100V Max Power: 10W Temperature Range: -30 Celsius - +125 Celsius Max Contact Resistance: 100m Ohm Hex Size: 14 x 14 x 4mm/0.55inch x 0.55inch x 0.16inch (L*W*T) Switch Height: 94mm/3.7inch Switch Angle: 45 Degree Total Body Length: 119mm/4.6inch Product Name: Float Switch Material: Stainless Steel Net Weight: 38g Color: Silver Package Content: 1 x Water Level Sensor Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.