The purpose of this master thesis is to point out where pressure and temperature measuring devices can be implemented in the hydrogen production, supply chain, storage system, refuelling station and in a hydrogen vehicle. For this reason, a basic knowledge for hydrogen as a chemical element and energy carrier in a vehicle has to be gained. Moreover, production methods, storage systems and the supply chain of hydrogen are described.

It has been shown that in order to ensure safe and stable processes it is indispensable to measure pressure and temperature in the entire hydrogen chain from the production right through to the energy conversion in a vehicle. On the basis of these results, the requirements and type approval processes of measuring devices in mobile hydrogen applications including associated refuelling stations are analysedto ensure a safe and reliable market entry for manufacturers. Special attention will be paid to possible challenges while measuring state sizes of hydrogen.

It has turned out that the European main standard EC79/2009 that regulates requirements and type approvals of components in mobile hydrogen applications will be repealed in July 2022. To find an adequate alternate standard, the American regulation HGV 3.1 is analysed in regards to commonalities and differences to EC79/2009. The result of the comparison is that in terms of type approvals for components in compressed gaseous mobile hydrogen applications HGV 3.1 scopes most of the relevant contents of EC79/2009 and can therefore be used as an alternative. However, when it comes to components for liquid hydrogen contact in mobile hydrogen applications there are no alternatives to the European standard. For this reason, until the gap is closed by a new international standard, manufacturers for components with liquid hydrogen contact have to refer to certain requirements of EC79/2009 but approve products according to valid regulations like HGV 3.1.

Finally, the analysis of requirements and type approvals for components used in refuelling stations according to ISO 19880-1 showed that close arrangements between customer and manufacturer is indispensable to ensure a smooth process.