EuReGa is the name under which National Metrology Institutes and Designated Institutes cooperate in the field of gas flow measurement in Europe. The Harmonized Reference Values (HRV) for volume and volume flowrate measurement of high-pressure natural gas are based on multiple independent traceability chains. The HRVs are the weighted averages obtained via a key comparison procedure. The laboratories change their own reference values to the HRV and benefit from a reduction of measurement uncertainties. This procedure is successful as long as the stochastic contributions to the overall measurement uncertainties are significantly smaller than the uncertainties arising from the traceability chain.
See EuReGa White Paper: Traceability chains of EuReGa Participants for high-pressure natural gas
Progress Report 2019-03-08
See EuReGa Communique: Intercomparison of primary high-pressure flow standards
Progress Report 2018-10-01
See EuReGa Communique: Harmonized Reference Values 2018
Progress Report 2018-06-29
See EuReGa Communique: Harmonized Reference Values 2017