Apparatus and method for testing of rod-shaped articles of the tobacco processing industry

The invention relates to an arrangement for checking cross-axially supported rod-shaped articles (14) of the tobacco processing industry, in particular for inspecting liquid-filled capsules (18) in filters (16) of filter cigarettes (14), with at least one trough conveyor (10, 20) with depressions (12, 22) for receiving and transverse axial conveying rod-shaped articles (14) and at least a microwave measuring device (30) with at least one microwave resonator (34), a machine of the tobacco-processing industry, as well as a corresponding method. The inventive arrangement is characterized in that the at least one microwave measuring device (30) along a path of conveyance of the rod-shaped article (14) at least one elongated, open at one lateral passage channel (40) (for a via the respective troughs (12, 22) overhanging portion comprising 15) of the article (14), wherein the at least one passageway (40) penetrates the at least one microwave resonator (34) laterally so that protruding portions (15) of the rod-shaped article (14) (on their conveyance through the passageway 40) is a Microwave measuring field (50, 52) pass through in at least one microwave resonator (34), pass through the rod-shaped article (14), in particular at a desired position of the capsules (18), the microwave measurement field (50, 52).