Characteristics: The float switch cannot directly control solenoid valves or high-power relays, AC contactors, etc. A small relay (such as HH54P) is needed for the transition. The double float switch can be used to control the liquid level in the water tank, swimming pool, sink, aquarium, etc. (drain or water) or to switch between high and low liquid level alarms. The contacts inside are made of a very sensitive reed switch. The operating range of the two floats of the double float switch is 10 mm . If the demand control range is large, two combinations of float switches can be used to achieve a large stroke so that the pump does not start too often. The normal water intake process activated by the float switch below and the float switch above stops working. The trigger is activated by the float switch above and the lower float switch stops working. Specification: Voltage: DC 0~110V Material : 304 stainless steel Size(Floating Body Length): 250 mm / 9.84 inch Package List: 1 x Double Ball Float Switch