Gravimetric Method ASTM E96, ASTM D1653, ISO 2528, DIN 53122-1, JIS Z0208, TAPPI T464 We make available the following: W3-330 Water Vapor Transmission Rate Test System W3-230 Water Vapor Transmission Rate Test System W3-030 Water Vapor Transmission Rate Tester W3-031 Water Vapor Transmission Rate Tester W3-060 Water Vapor Transmission Rate Test System W3-0120 Water Vapor Transmission Rate Tester