Abstract: The present invention concerns an electrode for measuring a bio-potential on, and/or providing electric stimulation to, a skin surface of a subject, said electrode comprising a device for providing a conductive fluid, the device comprises at least one container (1) for storing a conductive fluid (2), said container comprises at least one controllable outlet (3), wherein the conductive fluid (2) is retainable in the container at an above ambient pressure, during use said pressure is sufficient to provide a jet (8) of conductive fluid through the outlet (3).