Various working electrode configurations have been studied in order to characterise hydrodynamic behaviour in the FM01-LC reactor. A simple experimental arrangement has been used to generate data from electrolytic conductivity measurements in a series of impulse-response experiments. First and second moments of the tracer curves were calculated and the degree of dispersion was established as a function of the moments of the curves. The dispersion coefficient was found to increase with flow velocity and to be higher in the presence of turbulence promoters and three-dimensional electrodes. The Peclet numbers indicate that as the bulk velocity of the marker material increased, the degree of dispersion rose by a similar degree.