Sensor device for measuring the compression travel and/or the compression rate of wheels and/or axles of vehicles

A sensor device for measuring a compression parameter of at least one of wheels and axles of vehicles relative to one of a frame and an undercarriage of the vehicles, comprising:

• at least one contactlessly measuring sensor arrangement including a high-frequency sensor, the at least one contactlessly measuring sensor generating a beam which is emitted and received after reflection at one of a reference and reflection surface;
• wherein:
• the one of the frame and the undercarriage is of an air suspension device of the vehicle,
• the high-frequency sensor is situated one of in and on a housing of a level control valve which is fixedly mounted on the one of the frame and the undercarriage, and
• the one of the reference and reflection surface is formed by a portion of an outer surface of a housing of a differential gear which lies across from the at least one of a radar sensor and the high-frequency sensor and which is fixed in place on the axle.