this is all of the info that i have on the float switch. it came from china.
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 mini float switch. Contains no mercury.
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①FST-45LPP-001 INTRODUCE
install : This float switch is easily installed at the top of a tank by means of a threaded union and washer incorporated in the body of the switch. .
how to working :The switch consists of a floating magnet and a miniature electromagnetic switch contained within the tube.
The electric circuit is normally open when the tank is full: Float up = switch open, no electrical flow.
As the water level lowers, the float sinks and the circuit closes. Float down = switch closed, active current flow.
Installing the float 180 degrees will reverse the electrical conditions to:
float up = switch closed. Float down = switch open.
The floats are available in two types of materials:
(PP) Plastic tube and float. Used for most water and mild chemical based applications.
(SS) Stainless steel tube and float. Used for harsh chemical and corrosive applications.
Material specification :
Float ball: P.P
Float body:p.p
Tempe Rating :-10----+105 ℃
Max Contact Rating :70W
Max Switching voltage :220VAc
Max Switching Current :0.7A
Wire Lengh : 450mm