T The scarcity of the availability of petroleum in nature is caused by the increasingconsumption of fuel oil continuously which has an impact on the environment andcan cause a greenhouse effect which is also known as global warming. Therefore,to save on fuel consumption, alternative energy is needed. One such alternativeenergy is hydrogen gas (H2). Hydrogen gas is obtained by breaking down watercompounds (H2O) into hydrogen oxygen gas (HHO) using a dry type HHOGenerator (dry cell). This study aims to design, manufacture, and test dry type HHOproduction equipment (dry cell) with electrodes made of stainless steel type ss 304with dimensions of 158 X 113 mm with variations in electrode plate thickness of0.8 mm, 1.0 mm, 1.2 mm and a mixture of 4%, 5%, 6% NaCl or KOH catalyst, eachof which was dissolved in 500 ml of distilled water. The known characteristicsinclude the power consumption used by the generator, the HHO gas production rate,and the efficiency of the HHO generator. The results of the research and testing ofthis dry cell type generator obtained the largest gas volume of 1.2 L/M with acatalyst mixture of 6% KOH, an electric current of 25 A, with an electrode platethickness of 1.2 mm 1.4 L/M while the Efficiency of the HHO Gas Generator thehighest with 1.2 mm thick palt, 10 A electric current and a mixture of 6% KOHcatalyst is 45.5%.