The design and function of a dual-disc microelectrode device is described. The electrode assembly consists of two closely spaced platinum microdiscs sealed into a double-barrelled glass capillary. The practicality of the most common microelectrode geometry, ie the microdisc, is maintained also in the dual-disc configuration. The steady-state diffusion profiles do partially overlap each other. Thus, in analogy to the rotating ring-disc electrode generation-collection experiments can be performed, however, without the need of generated convection. At moderate scan rates (20 m V/s) no hysteresis occurs in the generation-collection mode. The dual-disc microelectrode system is characterized with respect to the collection efficiency, shielding and feedback factors using the ferrocene/ferrocenium couple. Furthermore, the reduction of Cu(II) in aqueous solution is studied by generation-collection experiments with the dual-disc microelectrode.