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    Review of Correlations of Infrared Detection Techniques for Water Vapor Transmission Rates (WVTR) with ASTM E 96-80 and Some Approaches to Gravimetric Calibration

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    Results from an ASTM interlaboratory comparison of Modern Controls IRD-2, now ASTM Test Method for Water Vapor Transmission of Flexible Barrier Materials Using an Infrared Detection Technique (F 372-73), and ASTM Test Methods for Water Vapor Transmission of Materials (E 96-80), the cup test, are reviewed in this paper. A brief report on correlations with the Permatran W is included. The results indicate that the infrared detecting instruments provide results similar to those from ASTM E 96-80 and in significantly less time.

    Some approaches to absorbing and weighing the transmitted water vapor for use in calibrating instruments are also covered.


    water vapor transmission, testing, infrared detection, water vapor transmission rates, round-robin testing, test methods, gravimetric calibration

    Author Information:

    Pike, L
    Section head, Physical Evaluation, W. R. Grace & Co., Duncan, SC

    Committee/Subcommittee: C16.33

    DOI: 10.1520/STP22965S