The level sensor is mainly composed of a reed switch and a float, which contains magnetic material, one or more reed switches in a closed non-permeable metal pipe or plastic tube, and then passes the conduit through one or more With a magnetic material of the float, and the use of fixed double-ring control float and reed switch in the relevant position, the float with the liquid rise or fall, the use of the ball near the beginning of the magnetic spring contacts, For level control or indication (when the float is close to the reed switch is turned on; off when the switch is off).High temperature resistant wire, acid resistant, alkali resistant, anti-fungal, high temperature resistant, resistant to various greases Normally open and normally closed can be adjusted, pull out the circlip take the floating ball and turn it 180° Epoxy resin, environmental protection, anti-oxidation, to prevent water leakage.