10.26165/JUELICH-DATA/A3JB9O Ritz, Lukas0000-0002-4332-3913(Forschungszentzrum Jülich GmbH)Pütz, Thomas(Forschungszentzrum Jülich GmbH)Müller, Martin0000-0002-7521-8237(Forschungszentrum Jülich GmbH)Lohmann-Richters, Felix0000-0003-3856-9318(Forschungszentrum Jülich GmbH) Jülich DATA 2025 The dataset provides the technical drawings and the assembly instructions for the “FZJ alkaline electrolysis test cell”, developed at Forschungszentrum Jülich, Institute of energy technologies, electrochemical process engineering (IET-4) and used in several benchmark studies including round robin campaigns. It serves to test components for hydrogen production by alkaline and anion exchange membrane electrolysis. The cell has an active area of 5 cm², a serpentine flow field made of nickel, with the necessary connections for fluids, current and voltage, as well as connections for temperature measurement and heating. Lohmann-Richters, Felix(Forschungszentrum Jülich GmbH)