Comparison of two kind hydrogen sensors of different sensing properties to hydrogen diffusion monitoring

Fast response and high durability hydrogen sensor is required in the safety management of hydrogen refueling station. We had developed the catalytic combustion type hydrogen sensor in the shape of the miniature beads. We compared this fast response sensor with the conventional semiconductor type sensor in the performance of hydrogen leakage real-time monitoring. It was observed that the fast response sensor's output fluctuated with hydrogen concentration's short time change. It was confirmed that this fluctuation was useful for the early detection of the hydrogen leakage.