(EN) The present device is of the type comprising a first and a second housings (1 and 2), separated by at least one resiliently deformable partition wall (3), and at least one pressure gas source connected directly to the first housing and, through a flow rate limiter (6), to the second housing (2), said second housing (2) comprising means (9) allowing to connect this second housing to the system (10) of which the flow rate is to be measured. This device comprises direct supply means (7) for the system (10) from the pressure gas source, said supply means being provided with a control (8) allowing to cut off said supply during the control operation of the gas flow rate of the system (10). This device is particularly intended to the control or measurement of low flow rates.
(FR) Ce dispositif est du type comportant une premiere et une seconde enceintes (1 et 2), separees par au moins une paroi deformable elastiquement (3), et au moins une source de gaz sous pression, connectee directement a la premiere enceinte et, par l'intermediaire d'un restricteur de debit (6), a la seconde enceinte (2), ladite seconde enceinte (2) comprenant en outre des moyens (9) permettant de la raccorder au systeme (10) dont on desire mesurer le debit. Ce dispositif comporte des moyens d'alimentation directe (7) du systeme (10) a partir de la source de gaz sous pression, lesdits moyens d'alimentation etant equipes d'une commande (8) permettant d'interrompre ladite alimentation pendant les operations de controle du debit gazeux dudit systeme (10). Ce dispositif est destine notamment au controle ou a la mesure de faibles debits.
