The final project workshop was held online on 18 September 2025 and gathered more than 70 participants.
During the event, attendees had the opportunity to learn about the project’s key results, including:
- the assessment and comparison of different methods to establish traceability for the measurement of hydrogen leak rates to atmosphere in the range (10-9 to 10-6) mol/s;
- metrological guidelines for the validation, calibration and verification of hydrogen sensors used within the hydrogen supply chain for quality control;
- the performance of flow meters and calibration facilities for blends of hydrogen and natural gas and pure hydrogen with 98 % purity;
- traceability chains for hydrogen flow metering with flow rates above 0.2 kg/min and three options for ensuring traceability from established primary standards for the 2030 European Industry and Hydrogen Community;
- inter-comparison on trace water in hydrogen standards over the nominal range from 0.5 μmol/mol to 50 μmol/mol with conclusions and the recommendations for future improvements;
- good practice on metrologically traceable quality monitoring in the hydrogen supply chain and recommendations for future improvements of ISO 19880-8 and ISO 21087;
- best practices in the evaluation of the measurement uncertainty for fiscal measurements along the hydrogen supply chain;
- metering uncertainty for custody transfer of hydrogen for transport, heat, and storage.
You can view and download all presentation slides below.
