ASTM D3985 is a standard developed by the American Society for Testing and Materials (ASTM), specifically designed for determining the oxygen transmission rate (OTR) of plastic film and sheeting. This standard outlines the test methods and procedures to ensure the accuracy and comparability of test results. For the oxygen transmission rate measurement of plastic films as specified in ASTM D3985, a specialized oxygen transmission rate test instrument plays a vital role in adhering to the standard. Taking Labthink C203H Oxygen Transmission Rate Test System as an example, it's designed and manufactured based on the coulometric oxygen analysis sensor and equal-pressure method, meeting the requirements of ASTM D3985 and other relevant standards. ASTM D3985 Plastic Film Oxygen Transmission Rate Tester: Test Principle The testing principle is based on the coulometric oxygen analysis sensor and the equal- pressure method. During the test, a pre-treated sample is clamped between two test
Open the catalog to page 1chambers. Oxygen flows on one side of the film, while high-purity nitrogen flows on the other side. Oxygen molecules diffuse through the film into the flowing high-purity nitrogen and are carried by the nitrogen to the sensor. The sensor measures the oxygen concentration, which is then used to calculate the oxygen transmission rate. ASTM D3985 Plastic Film Oxygen Transmission Rate Tester: Instrument Features and Application Scope • High Precision: Utilizes a ppb-level coulometric oxygen sensor, allowing for a lower testing limit. • Automated Control: Achieves automatic control of flow, temperature,...
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