OIML R 139
    Compressed Gaseous Fuel Measuring Systems for Vehicles
    Published
     International
 
Organization International Organization of Legal Metrology
Identification

Compressed Gaseous Fuel Measuring Systems for Vehicles OIML R 139
Scope This Recommendation specifies the methological and technical requirements applicable to compressed gaseous fuel measuring systems for vehicles, at type approval, initial verification and subsequent verifications. 

In general, the measuring systems that are covered by this Recommendation are intended for the refueling of motor vehicles, small boats and aircraft with compressed natural gas. Applications with other compressed gaseous fuels are covered. In principle, this Recommendation applies to all measuring systems fitted with a meter, whatever may be the measuring principle of the meters or their application.

 
Status

Published 2007. Available for downloading (free) at  www.oiml.org

 

A revision is underway to address, among other issues, new developments in hydrogen measurements.  Comments to the first working draft were made in April 2009.