OIML G18 Controlled Vocabulary Julia Neumann 2022-12-16 2023-01-02 10:32:57 en-EN electronic gas meter #01975 For the purposes of this Recommendation auxiliary equipment, as far as it is subject to metrological control, is considered part of the gas meter, unless the auxiliary equipment is approved and verified separately. gas meter equipped with electronic devices 2022-12-19 09:13:31