Abstract: In the case of a system for identifying and authenticating accessories, auxiliary substances and/or operating substances for items of equipment, the accessories or the auxiliary or operating substances or their storage containers are provided with a data carrier portion on which information that can be detected by the human eye and is distinctive to a human viewer is stored. The item of equipment is in this case provided with a reading and evaluating device for this information. The reading and evaluating device has a comparison device for comparing the read information with a stored item of information as well as an enabling controller for at least one functional component of the item of equipment.

Abstract: A reagent carrier (1) having a supporting body (2) for insertion into an analyzer unit and having at least one cavity (3, 3?, 3?) formed in the supporting body (2) for receiving a reagent for analyzing a bodily fluid, in particular blood serum or blood plasma. The reagent carrier is characterized in that the supporting body (2) has an elongated basic design having longitudinal sides (4, 4?) and transversal sides (5, 5?), and the transversal sides (5, 5?) differ in length.

Abstract: A reagent carrier has a first chamber, which contains a reagent. The reagent carrier is characterized in that at least one second chamber is provided to hold blood, a third chamber is provided to hold a dye and a fourth chamber is designed as a measurement chamber.