Industrial Position, Proximity, and Speed Module sensors are used to detect the presence, absence, or motion of an object and respond to the presence, absence, or motion of a magnetic field. Operates with either a north or south pole depending on the device. The type of modules include ball switch, bipolar switch, hall effect, logic magnetic pickup, omnipolar, potentiometer, reed switch, unipolar switch, and VRS. These are made for use in an industrial setting.