A SPECIMEN HOLDING PLATE FOR A GAS PERMEABILITY MEASURING APPARATUS

摘要

A specimen holding plate (1) for a gas permeability measuring apparatus. The specimen holding plate comprises a first surface (2) and a second surface (3), a number of passages (11, 12) between said second surface (3) and said first surface (2) so as to allow a predetermined gas mixture to be supplied to a first volume located at least partially above said first surface. The specimen holding plate further comprises a sealing arranged in a connection with said first surface and circumscribing said passages (11, 12) so as to circumferentially delimit said first volume. The sealing is provided as a double sealing (7, 8).