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The fuel cell is the heart of hydrogen-powered fuel cell vehicles. And here one component is particularly important, the bipolar plate of the fuel cell stack. Our modular and scalable machine concept works with the helium vacuum method for leak testing of all three process circuits of the bipolar plates (cooling, hydrogen and oxygen circuit). The method enables the detection of particularly low leak rates and short cycle times. The scalability of the system allows it to be adapted to current market demands and production requirements.