This fluid meter configured to perform metrological measurements in a fluid circulation pipeline and to communicate information relating to said metrological data, comprises: - a pipeline (2), - at least one metrological sensor (4), - a control unit (6), -...

A gas flow detecting device of the present invention, comprises a gas flow obtaining unit (1), and a control unit (2), wherein the control unit (2) is configured to determine at second period intervals, whether or not the usage gas flow of a fuel cell syst...