A medication delivery device comprising a contact free arrangement in for determining an absolute angular position of a first member that is rotatably mounted relative to a second member, the contact free arrangement comprising: - at least one track of reflector means arranged on the first member, - at least one emitter means (1, 3)arranged on the second member, the at least one emitter means (1, 3) being adapted to electrically couple and transmit a signal or signals to a number of reflector means of said at least one track of reflector means, - at least one receiver means arranged on the second member, the at least one receiver means being adapted to electrically couple to and to receive a signal or signals transmitted from a number of reflector means of said at least one track of reflector means, and - generator means for generating a signal or signals and providing the signal(s) to the at least one emitter means (1, 3) and processor means for processing a signal or signals received by the at least one receiver means, characterized in that - the first member is restricted for rotational movement relative to the second member between a first end position and a second end position over an angle of rotation exceeding one revolution, - the at least one track of reflector means forms a helical path, - the at least one track of reflector means, the at least one emitter means (1,3), the at least one receiver means and the generator means are so configured, and the first member is arranged relative to the second member in such a manner, that there is provided an unambiguously determinable electrical parameter to each respective position of the first member relative to the second memberfromthe first end position to the second end position, and in that - said electrical parameter is selected from the group consisting of capacitance and inductance. - at least one track of reflector means arranged on the first member, - at least one emitter means (1, 3)arranged on the second member, the at least one emitter means (1, 3) being adapted to electrically couple and transmit a signal or signals to a number of reflector means of said at least one track of reflector means, - at least one receiver means arranged on the second member, the at least one receiver means being adapted to electrically couple to and to receive a signal or signals transmitted from a number of reflector means of said at least one track of reflector means, and - generator means for generating a signal or signals and providing the signal(s) to the at least one emitter means (1, 3) and processor means for processing a signal or signals received by the at least one receiver means, characterized in that - the first member is restricted for rotational movement relative to the second member between a first end position and a second end position over an angle of rotation exceeding one revolution, - the at least one track of reflector means forms a helical path, - the at least one track of reflector means, the at least one emitter means (1,3), the at least one receiver means and the generator means are so configured, and the first member is arranged relative to the second member in such a manner, that there is provided an unambiguously determinable electrical parameter to each respective position of the first member relative to the second memberfromthe first end position to the second end position, and in that - said electrical parameter is selected from the group consisting of capacitance and inductance.