The invention concerns a biochip assembly, a sensor assembly and a method for operating a biochip assembly. The inventive biochip assembly is characterized in that it comprises a substrate and a plurality of sensors arranged in the substrate or thereon. Each sensor includes an electrode whereto can be applied a predetermined electric voltage, particles having an electric multipolar moment can be attracted or repelled in a zone enclosing the electrode with the electric voltage, and a detection device arranged in the zone enclosing the electrode and designed for fixing and detecting numerous particles. Said biochip assembly further comprises a control device coupled to the electrodes of the sensors and designed to apply sequentially predetermined electric voltages to the electrodes of the sensors.
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