System and method for gas diffusion coefficient measurement of three-dimensional hollow bodies having one opening

摘要

A non gas specific system (1) for use in constant volume/variable pressure gas diffusion coefficient measurement of a three dimensional hollow body (2) having one opening (15), said system comprises a sealable chamber (3) having an inlet line (4), a first outlet line (5) and a second outlet line (6) when sealed, wherein the inlet line (4) comprises an inlet valve (7) for regulated gas inlet into the chamber, the first outlet line (5) comprises a first pressure sensor (8) and a subsequent first outlet valve (9) for, in use, sucking gas out of said body (2) using a vacuum device (10) interacting with a vacuum sensor, the second outlet line (6) comprises a second outlet valve (11) for, in use, sucking gas out of the chamber (3) using a vacuum device (10), the chamber (3) is in material connection with a second pressure sensor (12), the system further comprises a data recording system (13) for, in use, recording the pressures at the first and second pressure sensors; and, in use, the chamber receives said body, and said first outlet line is in hermetical connection (14) with the opening (15) of said body. The present invention further proposes a method for performing said measurement.