an electronic device that varies its output voltage in response to changes in magnetic field density

a semiconductor device where the electron flow is affected by a magnetic field perpendicular to the direction of current flow

A semiconductor device in which an output voltage is generated in response to the intensity of a magnetic field applied to a wire. In an actuator, the varying magnetic field is produced by the rotation of a permanent magnet past a thin wire. The pulses generated serve to count the number of rotations of the motor.