The Hall spreads the feeling machine to be applicable to spirit to move,the liquid move,the position measurement of the air cylinder and piston pump makes a limit a switch to use may also.When the magnetism target near to, the creation hall effect, pass by to enlarge, output switch signal.Spread the feeling machine with the electricity feeling type to relatively have a following advantage:
Can install in the metals
Can proceed together close gearing
Can cut through metals to carry on an examination.Weakness is the distance is under the influence of the magnetic field strength and the examination body near to a direction of influence.
