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 condition drain pans pressure washers carpet cleaning mach. reef aquarium fluid control ice machines coffee pots marine automotive automobiles tropical fish tanks evaporator coils condensation line in relays or what ever your project may be. This is a float switch.? This right angle float switch can be arranged in any height.