Water Vapour, WVTR, OTR, MVTR, water vapor, water vapour permeability, water vapor barrier, water vapour transmission rate, measuring instrument, water vapour transmission rate tester, water vapour permeability tester, oxygen transmission rate, oxygen permeability, O2 transmission rate tester, Gintronic, ExtraSolution, ASTM E398, ASTM E96, DIN 53122, EN ISO 12572, EN 1931, ISO 2528, ISO 15106, JIS K 7129, NF H00-044, Lyssy, sd value, ASTM F2476-05, DIN 53380-3, ASTM F2622-07, ASTM F1249-06, Watertightness, watertightness tester, friction tester, rub tester, melt flow indexer, stiffness tester, EN 1928, thickness tester, thickness gauge