to the present invention which is a pump module the pump module comprises a casing base 2 which accommodates two plunger bodies 4 within itself and surrounds them in a reciprocatingly movable manner furthermore four tensioning screws 6 are shown which are embodiments of tensioning elements within the meaning of the present invention and in the assembled state engage with a head element 8 that is disposed before a pump unit 10 being received in casing base 2 while an annular rfid element 12 is interpositioned which is an example of a transponder unit of the present invention the casing base 2 for this purpose has a discharge region 14 which is configured as a cylindrical seat on the casing base 2 where an axial slot 16 is formed adapted to receive an inlet port 18 of the pump unit 10 the casing base 2 is likewise open at the end opposite to the discharge region 14 and forms a drive region 20 as can be seen in fig1 the casing base is formed to be substantially cylindrical formed on the outer circumferential surface on the casing base 2 are grooves 22 extending in the axial direction of the casing base 2 and transverse grooves 24 branching therefrom and extending transversely thereto which represent the guide and locking surfaces for attaching the pump module to a drive casing the details of which are illustrated in fig1 et seqq and the associated description the pump unit 10 is formed by a valve block 26 and a cover element 28 abutting thereagainst where two cylinder inserts 30 project from the valve block 26 on the side disposed opposite to the cover element.