Permeation and Transmission Rate Measurement Systems   OX-TRAN® 2/20 Oxygen Permeation and Transmission Rate Measurement Systems for Films and Packages. OX-TRAN® 2/60 Oxygen Permeation and Transmission Rate Measurement Systems for Films and Packages. PERMATRAN-W® 3/31 Water Vapor Permeation Rate Measurement Systems for Films and Packages. PERMATRAN-W® 3/60 Water Vapor Permeation Rate Measurement Systems for Films and Packages. PERMATRAN-W® MODEL 100K Water Vapor Permeation Rate Measurement System for Moisture Barriers. PERMATRAN-C® 4/40 Carbon Dioxide Permeation Rate Measurement Systems for Films and Packages.