Inductive proximity switch with differential coil arrangement

Inductive proximity switch with a pair of transmitting coils, having a first transmitting coil (S1) and a first receiving coil (E1) of a receiving coil arrangement, the first transmitting coil (S1) and the first receiving coil (E1) being disposed coaxially relative to each other, the transmitting coil (S1) transmitting an exciting field for inducing eddy currents in a metallic trip (1) brought into the vicinity of the proximity switch, which eddy currents generate a voltage-inducing eddy current field in the first receiving coil (E1) of the receiving coil arrangement, the first coil (E1) and a second coil (E2) of the receiving coil arrangement being disposed and connected in such a way that the exciting field generates a differential voltage (3) in the receiving coil arrangement, and wherein the proximity switch further comprises a pair of compensating coils including the second coil (E2) of the receiving coil arrangement and a compensating coil (S2) connected in series with the first transmitting coil (S1), the pair of compensating coils being disposed in such a way that they are virtually unable to be influenced by the eddy current field.