When selecting a gas permeation tester, the initial step is to identify the gas being tested. Here are some recommendations based on the type of gas: | | | | If O2 is only the gas to be tested, the company can choose either Coulometric Method or Manometric Method. | | | | As to other gases, it should be Manometric Method only. | | | | If Both O2 and other gases are to be tested, it should be Manometric Method only. | | | For Gas Permeation Measurement, if test gas is confirmed, it means the test method is confirmed. The second step is to check the test range. Different methods have their respective testing ranges. | | | | For High barrier materials, lower than 0.1 cm3/(m2?d), should choose Coulometric Method | | | | For Medium barrier materials, from 0.1-200cm3/(m2?d), it can choose both | | | | For low barrier materials, higher than 200cm3/(m2?d), it would be better to choose Manometric Method. | | | | |