A device and method for checking for systems of mass flow measurements of test benches fuels.

The present invention relates to a mobile device verification measurement systems (11b) of mass fuel flow, the device comprises a conduit (3) which splits downstream of an inlet port (1) of fuel into a plurality ducts (3a, 3b), each of these ducts (3a, 3b) comprising a selecting means (5a, 5b) sensor, a control valve (6a, 6b), and a sensor for measuring a specific range each conduit for measuring a flow range of values ​​that is different from the range of values ​​measured by the other sensor conduit, the conduits (3a, 3b) being joined upstream of the outlet (2) fuel.