A sensor device (10) for non-contact detection of a rotatable object (12), in particular for detecting a rotational speed of a compressor wheel (14) of a turbocharger (18), is proposed. The sensor device (10) comprises a sensor housing (22). The sensor device (10) further comprises at least one magnetic field generator (26) for generating a magnetic field at the location of the rotatable object (12) and at least one magnetic field sensor (28) for detecting a magnetic field generated by eddy currents of the rotatable object (12). The sensor device (10) further comprises at least one connecting element (58, 60, 62), wherein the connecting element (41, 58, 60, 62) is arranged to surround the sensor device (10) with a rotatable object (12) Device (40), in particular a turbocharger (18) to connect, that the magnetic field generator (26) and the magnetic field sensor (28) at least partially together in a sensor portion (24) of the sensor housing (22) are arranged and the sensor housing (22) at least Sectionally spaced from the device (40) comprising the rotatable article (12).
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