Working principleThe liquid level sensor is mainly composed of a magnetic reed switch and a floating ball. There are magnetic materials in the floating ball. One or more magnetic reed switches are set in a closed non-magnetic metal tube or plastic tube, and then the conduit is passed through one Or multiple floats with magnetic materials, and use fixed double loops to control the floats and magnetic reed switches at the relevant positions. The floats rise or fall with the liquid, and use the contact point in the ball near the beginning of the magnetic reed to open and close Action for liquid level control or indication (when the float is close to the reed switch, it is turned on; when it leaves, the switch is turned off) Selection instructions:Please select floats of various specifications listed in the above table according to the temperature, pressure, specific gravity, acid and alkali resistance and other characteristics of the tested object.