Sensor arrangement for detecting changes in angle

A sensor device for measuring angle changes of mechanical parts that rotate relative to each other, said sensor device comprising

• only one magnet (3) mounted on a first part and producing a magnetic field consisting of magnetic field lines (4;
• 4.1,4.2) and having a magnetic pole;
• and
• two magnetoresistive sensors (5′,5″) mounted on a second part so as to be located in said magnetic field lines opposite said only one magnet (3), said two magnetoresistive sensors having respective magnetic field sensitive layers (MS) facing the magnetic pole of said only one magnet (3) and extending tangentially to a rotation direction in which the parts rotate relative to each other, said two magnetoresistive sensors (5′,5″) comprising means for generating respective electrical output signals according to respective directions of said magnetic field lines relative to said magnetoresistive sensors, whereby said respective output signals depend on a relative rotational angular position of said parts;
• and
• means (PT) for combining said respective output signals of said two magnetoresistive sensors (5′,5″) so as to produce a combined output signal that is set to zero when said parts are arranged at a predetermined relative rotation angle with respect to each other.