This product is designed for precise electrochemical testing in fuel cell research, integrating a fixture with a constant temperature numerical control device. The graphite electrode plate (100 mm × 100 mm × 12.5 mm) offers good conductivity and features customizable flow channels for gas or liquid reactants, with a single effective area of 20 mm × 20 mm. Temperature control is maintained within 100 °C, ensuring stable operating conditions. The gold-plated copper plate (100 mm × 130 mm × 3 mm) provides reliable electrical contact, while interface options include stainless steel quick connectors or PFA connectors for flexible setup. This system is suitable for evaluating membrane electrode assemblies or catalyst performance under controlled thermal environments, supporting both academic research and material screening in energy conversion studies.