... instrument) 2) Test the oxygen transmission rate of film or flexible barrier material Oxygen Permability rate Tester – Coulometry theory ... -7126 ; GB/T 19789-2005, Function:To test package oxygen transmission rate. Application :* Filmsrigid films, shrik films, stretch ... building materials, and thermal insulation materials, e.g. PP, PVC, PVDC, and nylon*Packagespaper, plastics, rubber, paper, paper- ...