Patent ID: 8120351

Claim:
A magnetic sensor arrangement, having magnetically sensitive sensor elements ( 7 , 8 ) whose electrical properties are changeable as a function of a magnetic field that a moving, passive transmitter element ( 11 ) is able to influence, with the magnetic field being substantially perpendicular to the sensor elements ( 7 , 8 ), wherein the magnetic sensor arrangement ( 1 ) has two sensor elements ( 7 , 8 ) in a gradiometer arrangement that are each respectively associated with one of two regions ( 4 , 5 ) of a permanent magnet embodied in the form of a gap magnet ( 2 ), which regions are spaced apart from each other by a predetermined distance (sa), the sensor elements ( 7 , 8 ) are arranged one after the other in a direction of movement of the transmitter element ( 11 ), the sensor elements ( 7 , 8 ) are associated with edges of a gap ( 21 ) in a rotary direction of the transmitter element, the magnetic regions ( 4 , 5 ) and the permanent gap magnet ( 2 ; 20 ) - in terms of the dimensions (h, b, t), the gap width (sa), the gap depth (st), and their positions in relation to the sensor elements ( 7 , 8 )—are situated so as to minimize the offset of the output signal of the sensor elements ( 7 , 8 ) in the gradiometer arrangement, and the gap ( 21 ) has a contour with a wedge-shaped narrowing in the direction of the gap depth (st) of the permanent gap magnet ( 20 ; 23 ).