<p>SS316L<em> iron plate is a material that is often used in construction on machinery. In this study, </em>6<em> sheets of </em>SS316L<em> plates as electrode plates measuring </em>100 mm × 100 mm<em> were assembled into a spacer shape arranged parallel to the distance of 2 mm. The </em>SS316L<em> electrode plate consists of two types, namely the original electrode plate or flat plate and the electrode plate through a treatment process where the surface is made of lines </em>(<em>texture</em>)<em>. Both flat and textured electrode plate is formed into a spacer which then inserted to the </em>HHO<em> generator as the main component in the water electrolysis process. Measurements and calibrations are performed on each </em>HHO<em> generator with flat electrode plates and textured electrode plates with </em>KOH<em> catalyst </em>10<em> grams, </em>20<em> grams and </em>30<em> grams. The results of the calibration of the two types of HHO generators show that the </em>HHO<em> generator with texture plates is better than the flat plate with an average value of </em>1.03 L<em>/minute</em>.</p>