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It is suitable for the water vapor transmission rate (WVTR) testing of various film materials such as plastic films, paper-plastic composite films, co-extruded films, aluminized films, aluminum foil composite films, glass fiber aluminum foil paper composite films, etc. in fields like food, pharmaceuticals, medical devices, daily chemicals, photovoltaics, electronics, etc. It is also applicable to the WVTR testing of sheet materials such as PP sheets, PVC sheets, PVDC sheets, metal foils, rubber sheets, silicon wafers, and the water vapor transmission performance testing of related materials.
link:https://www.snlabtester.com/wvtr-tester/single-chamber-wvtr-cup-method.html
WVTR Testing