| 1. A magnetic sensor for determining positions (A, B, C, D) of an activation magnet (2) along a monitored distance (6) with at least two sensor elements (8, 10) wherein the sensor elements (8, 10) are arranged along the monitored distance and are separated by a spacing (12), each of which is subjected to at least a component of a magnetic field of the activation magnet (2), and an evaluation unit (14) operatively coupled with the sensor elements (8, 10) for generating a switching signal (18) corresponding to at least one desired magnet position (A, B, C, D), each sensor element (8, 10) being operative over the entire monitored distance (6), the spacing between the sensor elements (8, 10) being independent of the length of the monitored distance and shorter than the monitored distance (6), and for any desired magnet position (A, B, C, D) there is provided an unambiguous group of values (20, 20′) for generating the switching signal with the evaluation unit which generates an unambiguous positioning signal.
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