Float Ball Switch When the water level is low, the ring magnet is in the open state, which is normally open; when the water level is high, the ring magnet is in the closed state, which is normally closed. The floating ball switch is composed of a magnetic spring switch and a floating ball. There are magnetic materials in the floating ball. One or more magnetic spring switches are set in the closed non magnetic metal pipe or plastic pipe, and the pipe is passed through one or more floating balls with magnetic material. The fixed double ring is used to control the floating ball and the magnetic spring switch at the relevant position. The floating ball rises or falls with the liquid, and the contact of the magnetic spring switch open or close for liquid level control or indication. Please Note : Float switch can not directly control solenoid valve or high power relay, AC contactor, etc. Small relays are required to transition. Floating ball switch can not directly control water pump, solenoid valve and alarm. When controlling solenoid valve and alarm, small relay should be added. When controlling the water pump, it is necessary to add small relay and AC contactor (select AC contactor to match according to the power of water pump) Widely Application :