10.26165/JUELICH-DATA/YJNJFKUtsch, NikolaiNikolaiUtsch0000-0002-7739-6432Institute of Energy Technologies – Electrochemical Process Engineering (IET-4)Berg, FlorianFlorianBergInstitute of Energy Technologies – Electrochemical Process Engineering (IET-4)Scheepers, FabianFabianScheepers0000-0001-6243-4291Institute of Energy Technologies – Electrochemical Process Engineering (IET-4)Holtwerth, SebastianSebastianHoltwerth0000-0002-5665-4279Institute of Energy Technologies – Electrochemical Process Engineering (IET-4)Shviro, MeitalMeitalShviro0000-0002-0491-514XInstitute of Energy Technologies – Electrochemical Process Engineering (IET-4)Lehnert, WernerWernerLehnert0000-0002-7423-872XInstitute of Energy Technologies – Electrochemical Process Engineering (IET-4)Mechler, AnnaAnnaMechler0000-0002-0491-514XInstitute of Energy Technologies – Electrochemical Process Engineering (IET-4)Jülich DATA2026ChemistryEngineeringPhysicscatalyst layersimage processingin-plane electrical resistivitiespolymer electrolyte membrane (PEM) water electrolyzersporous electrodesprinted circuit boards (PCBs)sheet resistancesUtsch, NikolaiNikolaiUtschInstitute of Energy Technologies – Electrochemical Process Engineering (IET-4)2026-08-242026-09-3010.1002/smtd.202401842851695515463497954897176795795application/octet-streamapplication/octet-streamapplication/octet-streamtext/plainapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-stream1.0CC0 WaiverUnderstanding the sheet resistance of porous electrodes is essential for improving the performance of polymer electrolyte membrane (PEM) water electrolyzers and related technologies. Despite its importance, existing methods often fail to provide reliable and comprehensive data, especially for porous materials with complex morphologies and non-uniform thicknesses. This study introduces a robust and straightforward method for determining the sheet resistance of porous electrodes using a novel probe concept based on industrial printed circuit board (PCB) technology. This probe measures resistance across ten distances, ranging from 250 µm to 2500 µm, enabling local mapping of resistance. The study focuses on the sheet resistance of key components in PEM water electrolyzers, including the gas diffusion layer (GDL), porous transport layer (PTL), and catalyst layers deposited on a membrane. Additionally, an image-processing-based method is presented to obtain the thickness distribution of the studied catalyst layers, facilitating a detailed analysis of the electrical in-plane resistivity with thickness variations. Overall, this methodology has the potential to expedite material integration and bridge the gap between electrode engineering and single-cell testing, thereby advancing the development of PEM water electrolyzers. This dataset provides the Gerber fabrication files for the custom PCB-based probe introduced in the associated publication. The files contain the PCB layer and geomertry data needed to reproduce the probe geometry with its ten measurement distances from 250 µm to 2500 µm; the measurement procedure and data evaluation are described in the related article.European Union's Horizon 2020862253