The invention relates to a magnet sensor arrangement (1) containing sensor elements (7,8) that are sensitive to magnetic fields, the electrical properties of said elements being modifiable according to a magnetic field that can be influenced by a mobile passive transmitter (11). Said magnet sensor arrangement (1) comprises two sensor elements (7,8) in a gradiometer arrangement, that are respectively associated with one of two magnetic regions (4, 5) of a permanent magnet embodied as a gap magnet (2;20;23), said regions being arranged at a pre-determined distance (sa). The magnetic regions (4,5) and the gap magnet (2;20;23) are arranged, in terms of, for example, the wedge shape, dimensions (h,b,t), gap length (sa), gap depth (st), and positions thereof in relation to the sensor elements (7,8), in such a way that the offset of the output signal of the sensor elements (7,8) is minimised in the gradiometer arrangement.