The HETS-PWE-S series product is aimed at providing the PEM electrolyzer with an accurate and reliable test platform. The system consists of primary & secondary gas-water separation unit, gas concentration monitoring unit, gas cooling and dry unit, deionized water circulation system, pressure regulating unit, sampling and control unit and safety monitoring unit. The system test software independently developed by the company is used and it can meet PEM electrolyzer performance, durability, reliability and safety test. The system is applicable to the R&D, performance testing and EOL testing of PEM electrolyzer.