A device for sorting coins of a set of coins with a coin feed device 1, with a coin sorting plate 2 joining the coin feed device 1, which has a guide edge 3, a guide strip 4 extending along the guide edge 3 as well as a series of sorting openings 5 graduated for different coin diameters with cross sections increasing in the direction of conveying. Samples are introduced by applying a high voltage from a high voltage power supply between the sample tray and a coupler in a state in which one-ends of the capillaries are inserted in the samples contained in the sample tray. The first receptacle module and the second receptacle module are formed of plastic and metal respectively. The cover presents a compliant surface to the microchannels.