NOVELTY - The device (10) has a cathode (20) placed within an internal cavity of a cylindrical ceramic coated aluminum housing (14). An cylindrical spiral anode (18) is placed within the internal cavity. A cylindrical metal sleeve (22) is slidingly placed within the internal cavity, where water/brine in the housing is extended continuously from a main portion of the internal cavity to an end portion of the internal cavity. A perforated wall (30) is placed within the internal cavity near the end portion of the internal cavity and electrically connected to the cylindrical spiral anode or the cathode.    USE - Cylindrical hydrogen generating device.    ADVANTAGE - The device allows the perforated wall to sufficiently separate the main portion of the internal cavity from the end portion i.e. end chamber, of the internal cavity and allow the water/brine to flow from the main portion of the internal cavity to the end chamber of the internal cavity, so that the water/ brine can be easily exchanged with fresh fluid from other parts of the device due to a cylindrical structure of the device, thus increasing efficiency of the device, and hence producing hydrogen gas in an efficient manner. The device allows a pressure sensing switch i.e. Hobb switch, to close a safety circuit of the device if hydrogen gas pressure exceeds a safe value.    DETAILED DESCRIPTION - The perforated wall is a metal plate or open cell metal foam. The cylindrical spiral anode e.g. hollow metal cylinder/tube or cylindrical wire mesh. The cathode and anode comprises a metal foam i.e. aluminum metal foam. An INDEPENDENT CLAIM is also included for a method for using a hydrogen generating device.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a cylindrical hydrogen generating device.    Cylindrical hydrogen generating device (10)    Cylindrical ceramic coated aluminum housing (14)    Cylindrical spiral anode (18)    Cathode (20)    Cylindrical metal sleeve (22)    Perforated wall (30)