In the life cycle of every measurement device there comes a time where its performance is in question and it needs to be verified, specifically when such devices are used for custody transfer measurement. With the FMTB Series FMG has developed highly accurate compact Transfer Provers and installations with very low uncertainty guaranteeing that every meter that is tested on it does receive the latest, accurate verification report. All Master Meters are traceable to VSL (formerly NMi). On request, all Test Benches and Installations can be fully VSL certified.