A study has been made of mass transfer to a circular disk electrode located in the stagnation region of an impinging jet. A semiempirical solution of a convective diffusion model is presented in the form of an asymptotic series to permit an estimate of the transfer rate for . Experimental results reveal that the electrode possesses a property of “uniform accessibility” to the diffusing species if the electrode radius is less than 1 nozzle diameter for turbulent jet and nozzle diameter for laminar jet. Within this region, the mass transfer is relatively independent of radial positions, and the semiempirical correlations are presented for both laminar and turbulent flows over a range of nozzle heights from 0.2 to 6 nozzle diameters. The result indicates that the impinging jet electrode is a feasible tool for electroanalytical applications. This geometry can be easily adopted in process streams and closed systems at a pressure other than the ambient atmosphere.