A dual-electrode flow sensor fabricated using track-etched microporous membranes

► The microporous membrane electrode was prepared by sputtering of platinum onto the track-etched membrane filter. ► A new dual-electrode flow sensor has been fabricated by piling these electrodes. ► The electrolysis is performed when the sample solution flows through the membrane electrode. ► In this case, the sample solution surely flows through the pores of the membrane filters. ► Because of the highly efficient electrolysis at each electrode, collection efficiency values as high as 100% were obtained.