Flux switch

The utility model relates to a flux switch solves the problem that prior art exists: no check valve, need dispose alone, the configuration cost is high, intake easily, make the tongue tube malfunctioning. The technical scheme who adopts: the stiff end of guide arm inserts in the blind hole on the float to fix in the blind hole, set up the direction passageway on the switch seat, the free end of guide arm inserts the direction passageway, during the use, rivers promote the float makes the float drives the guide arm and moves in the direction passageway, makes the tongue tube respond to the magnetic force change and produces switching signal. Its effect: the stiff end of guide arm is fixed on the float, and the free end setting of guide arm is on the switch seat, and the float can promote tomove down all the time at the fluidic, makes magnet on the float can influence the tongue tube and produces corresponding switching signal, avoid float card sand and not the portability result in theappearance of the malfunc