Non -contact hall displacement sensor

The utility model discloses a non -contact hall displacement sensor. Push rod (1) is under the guide effect of the sensor housing (3) and sensor end lid (2), but endwise slip. Magnetism row (4) are fixed on push rod (1), comprise two or more magnet, arrange in proper order, leave the clearance between per two magnet. Any two adjacent one end that magnet pole nature is the same are each other nearplacing. Hall sensor circuit board (5) install at the sensor housing (3) insidely, have the higher authority placed a set ofly or the formation of multiunit hall sensor, and the formation of every hall sensor of group comprises two or more hall sensor (6), each hall sensor (6) interval arrangement in every group. Push rod (1) axial displacement is followed in magnetism row (4), and the magnetic field intensity that hall sensor (6) detected also changes thereupon, and the induced voltage of hall sensor (6) output is relevant with magnetic field intensity to detect out the relative displacementof push rod (1) and the se