Alternatively, the at least one sensor 32 may be one or several magnets and/or ferromagnetic elements, and the sensor arrangement 30 may comprise a magnetometer, such as comprising a magnetometer, such as comprising a coil, or a Hall effect sensor for detecting position or change of position of the one or several magnets.
Still alternatively or in addition, the sensor arrangement 30 may comprise a capacitive sensing element, as a sensor 32, for detecting the position or the change of position of the at least one detection portion 42. In such embodiments, the detection portion 42 may or may not comprise another capacitive element. Alternatively, the movable member 40 may be such as affecting the field measured or monitored by the sensor arrangement 30.