Metrological guidelines for the validation, calibration and verification of hydrogen sensors used within the hydrogen supply chain for quality control

This document is intended to be a guideline for validation, calibration and verification of sensors used within the hydrogen supply chain. Three types of sensors are described as relevant for the hydrogen supply chain: safety hydrogen sensors, hydrogen purity sensors and sensors which measure hydrogen in gas mixtures (for example hydrogen/methane). Together with the rigs developed at NPL and RISE and the protocol, this is a good basis for reliable testing of sensors which is a prerequisite to demonstrate that any sensor is fit-for-purpose for a given application. In annex, the protocol developed during Met4H2 is given.