A sensor device for determining characteristics of a rotor, the sensor device comprising: a first and a second sensing coil (612, 614), each sensing coil (612, 614) configured to interact with a surface of the rotor to detect displacements of the rotor relative to the first and second sensing coils (612, 614); and an input transformer having a primary winding and at least a first and a second secondary winding (212, 213), the primary winding of the input transformer forming an input for an excitation signal; wherein the first sensing coil, the second sensing coil, and the secondary windings (212, 213) of the input transformer are connected to form an bridge circuit, the bridge circuit comprising a first, second, third and fourth leg, the first leg comprising the first sensing coil, the second leg comprising the second sensing coil, the first leg and the second leg being connected in series to form a common node between them, the third leg comprising the first secondary winding of the input transformer, and the fourth leg comprising the second secondary winding of the input transformer, the third and fourth leg being connected in series to form a common node between them, wherein the common node between the first and second legs of the bridge circuit is connected to a first contact of a first output tap for a first output signal, and wherein the common node between the third and fourth legs of the bridge circuit is connected to a second contact of the first output tap, wherein the sensor device comprises an input cable (410; 411) connected to the primary winding of the input transformer, the input cable (410; 411) having a first characteristic impedance and at least one impedance matching element connected to at least one of the primary winding, the first secondary winding and the second secondary winding of the input transformer to match an input impedance at the primary winding of the input transformer to a characteristic impedance of the input cable (410; 411), and/or the sensor device comprises a first transfer cable having a first end and a second end, the first end being connected to the third leg of the bridge circuit and the second end being connected to the first leg of the bridge circuit, the first transfer cable having a first characteristic impedance, a second transfer cable having a first end and a second end, the first end being connected to the fourth leg of the bridge circuit and the second end being connected to the second leg of the bridge circuit, the second transfer cable having a second characteristic impedance, and one or more impedance matching elements (C11, C12, C13) connected to the second ends of the first and second transfer cables (412, 413) to match input impedances at the first and second legs of the bridge circuit to the characteristic impedances of the first and second transfer cables (412, 413). a first and a second sensing coil (612, 614), each sensing coil (612, 614) configured to interact with a surface of the rotor to detect displacements of the rotor relative to the first and second sensing coils (612, 614); and an input transformer having a primary winding and at least a first and a second secondary winding (212, 213), the primary winding of the input transformer forming an input for an excitation signal; wherein the first sensing coil, the second sensing coil, and the secondary windings (212, 213) of the input transformer are connected to form an bridge circuit, the bridge circuit comprising a first, second, third and fourth leg, the first leg comprising the first sensing coil, the second leg comprising the second sensing coil, the first leg and the second leg being connected in series to form a common node between them, the third leg comprising the first secondary winding of the input transformer, and the fourth leg comprising the second secondary winding of the input transformer, the third and fourth leg being connected in series to form a common node between them, wherein the common node between the first and second legs of the bridge circuit is connected to a first contact of a first output tap for a first output signal, and wherein the common node between the third and fourth legs of the bridge circuit is connected to a second contact of the first output tap, wherein the sensor device comprises an input cable (410; 411) connected to the primary winding of the input transformer, the input cable (410; 411) having a first characteristic impedance and at least one impedance matching element connected to at least one of the primary winding, the first secondary winding and the second secondary winding of the input transformer to match an input impedance at the primary winding of the input transformer to a characteristic impedance of the input cable (410; 411), and/or the sensor device comprises a first transfer cable having a first end and a second end, the first end being connected to the third leg of the bridge circuit and the second end being connected to the first leg of the bridge circuit, the first transfer cable having a first characteristic impedance, a second transfer cable having a first end and a second end, the first end being connected to the fourth leg of the bridge circuit and the second end being connected to the second leg of the bridge circuit, the second transfer cable having a second characteristic impedance, and one or more impedance matching elements (C11, C12, C13) connected to the second ends of the first and second transfer cables (412, 413) to match input impedances at the first and second legs of the bridge circuit to the characteristic impedances of the first and second transfer cables (412, 413).