The MOCON PERMATRAN-W  Model 3/34 G fully automated water vapor transmission rate testing system is designed for packaging and other barrier structures used with moisture-sensitive products. It stores 4 NIST calibration films; a calibration curve is generated across the system’s entire range. The system features automatic maintenance of temperature, relative humidity, flow and pressure; the ability to run 10 sequential tests with 1 setup; and a high purge mode.