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The invention relates to a device for analysing constituents of a sample. Said device comprises sensor molecules that are deposited on one surface of a carrier, which optionally bond with the constituents to be analysed. The aim of the invention is to reliably detect even negligible quantities of sample constituents to be analysed and to obtain good results from said analysis. To achieve this, the carrier consists of a centrifuge head that can be inserted into a sample container, leaving a radial annular gap exposed. The peripheral surface of the centrifuge head forms the surface that is to be provided with the sensor molecules.