The ASTM F 2622-20 standard provides a test method for the determination of oxygen transmittance (O2GTR) of Plastic film and sheet, suitable for devices using a variety of Sensors. The method covers the determination of steady-state transport rates of oxygen through different types of plastic materials, including films, sheets, and coated materials. It provides measurements of oxygen transmittance, oxygen permeability of membranes, and oxygen transmittance coefficient. Although this method can be used as a referee test, its accuracy and deviation need to be determined according to the specific instrument and Sensors used. Users need to ensure compliance with applicable safety codes and use internationally recognized standardization principles.