Converging to a low carbon future is increasingly relying on hydrogen for energy generation and industry uses. The OSH2S project consists in developing and testing in the field an innovative, efficient, reliable, accurate and ruggedized continuous hydrogen monitor based on metal insulated semiconductor (MIS); this monitor will be entirely manufactured in Europe. An accurate hydrogen sensor is essential for monitoring hydrogen storage in geological formation and for natural hydrogen exploration. OSH2S is funded by the European Union through MINE.THE.GAP, and is developed in conjunction with two French SME’s, Collaborative Energy and Hidrogène Naturel.