Rotational speed sensor arrangement comprising: an encoder wheel having signal marks which are spaced apart from one another; a sensor having at least two Hall sensor elements (14a, 14b) which form a differential Hall sensor and are designed in such a manner that they each output a Hall signal on the basis of the position and/or movement of the signal marks; and a signal circuit which is designed to determine an output signal on the basis of the Hall signal and to determine a rotational position of the encoder wheel on the basis of the output signal, wherein the signal marks have radially running tooth elements with two tooth edges and the tooth edges converge on a switching edge, the signal marks comprise gaps which form identical spacings between the tooth elements in the circumferential direction, a reference mark is provided and is in the form of an additional control tooth element in a gap, wherein the sensor device comprises at least three Hall sensor elements (14a, 14b, 15) which form a first and a second differential Hall sensor and are designed to provide differently phase-shifted Hall signals depending on the direction of rotation of the encoder wheel, wherein the sign of the phase offset changes in the event of a change in the direction of rotation and the change in the direction of rotation can therefore be detected, and wherein the rotational speed sensor arrangement is designed to determine the absolute position of the encoder wheel taking into account a reference position indicated by the reference mark and the information relating to the direction of rotation. an encoder wheel having signal marks which are spaced apart from one another; a sensor having at least two Hall sensor elements (14a, 14b) which form a differential Hall sensor and are designed in such a manner that they each output a Hall signal on the basis of the position and/or movement of the signal marks; and a signal circuit which is designed to determine an output signal on the basis of the Hall signal and to determine a rotational position of the encoder wheel on the basis of the output signal, wherein the signal marks have radially running tooth elements with two tooth edges and the tooth edges converge on a switching edge, the signal marks comprise gaps which form identical spacings between the tooth elements in the circumferential direction, a reference mark is provided and is in the form of an additional control tooth element in a gap, the signal marks have radially running tooth elements with two tooth edges and the tooth edges converge on a switching edge, the signal marks comprise gaps which form identical spacings between the tooth elements in the circumferential direction, a reference mark is provided and is in the form of an additional control tooth element in a gap, wherein the sensor device comprises at least three Hall sensor elements (14a, 14b, 15) which form a first and a second differential Hall sensor and are designed to provide differently phase-shifted Hall signals depending on the direction of rotation of the encoder wheel, wherein the sign of the phase offset changes in the event of a change in the direction of rotation and the change in the direction of rotation can therefore be detected, and wherein the rotational speed sensor arrangement is designed to determine the absolute position of the encoder wheel taking into account a reference position indicated by the reference mark and the information relating to the direction of rotation.