Method and device for determining at least one operating parameter of a filter or a filter cartridge arranged in the filter, and filter cartridge

A device for determining at least one operating parameter of a filter or of a filter cartridge situated in the filter, comprising:

• at least one transponder being situated on or in the filter cartridge or in a filter housing of the filter, which transponder is configured to be queried in a contactless manner by a reading device, and
• an evaluation unit configured to analyze a response of the transponder to evaluate the at least one operating parameter of the filter or filter cartridge,
• wherein the transponder, which is exposed to influences acting on the filter cartridge in the filter during its operation and is sensitive to the influences, is configured to be modified by an action of these influences on the transponder itself or on the conducting or damping properties of a transmission path of electromagnetic signals between the transponder and reading device with regard to a response behavior of the transponder, to a degree that is detectable by the reading device or the evaluation unit and that permits a statement to be made about the at least one operating parameter of the filter or filter cartridge.