Abstract: The invention relates to a monitoring apparatus (10) for at least one electrical apparatus designed for inductive energy transmission, having a sensor device (12) with a coil arrangement comprising at least one coil (14) and an evaluation device (20) for detecting whether at least one measured physical variable differs from at least one predefined normal range of values, wherein the at least one coil (14) of the coil arrangement is wound, designed and/or attached to at least one filter in such a manner that currents and/or voltages induced in the at least one coil (14) of the coil arrangement can be at least partially averaged and/or filtered out. The invention also relates to electrical apparatuses equipped with the monitoring apparatus (10) and to corresponding methods.