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MOCON, Inc: Water vapor measurement instrument

Designed to measure the water vapor transmission rate (WVTR) of ultra-high barrier films, Mocon’s new generation AQUATRAN Model 2 WVTR measurement instrument targets commercial or developmental ultra-high barrier structures, including flexible films for organic light-emitting display (OLED), solar, and similar demanding applications.
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The AQUATRAN Model 2 uses proprietary technology to accurately and repeatedly measure WVTR down to 5x10-5 g/(m2-day). This is one order of magnitude lower than its predecessor the Model 1.  The Model 2 increases sensor sensitivity and reduces the possibility of ambient humidity interfering with test results. It is said to be the only system available for measuring trace WVTR that is not calibration dependent, providing more accurate and repeatable results.

The model uses the company’s newest AquaTrace Gold coulometric longer-life sensor, which is based on Faraday’s Law. Every water molecule entering the sensor is directly converted to a measureable charge.  No calibration is necessary, helping assure an accurate test result.

Transient data also is quantifiable and can be viewed during or after the test. (Analysis of transient data can yield important information about an OLED structure such as detecting defects and voids in the applied coatings.)

Additional enhancements to the instrument include improved electronics,  enhanced block and valve design, and the introduction of TruSeal technology ,which reduces seal-edge leaks due to ambient humidity.

The AQUATRAN Model 2 is available in two versions. The G system operates between 35 and 90% relative humidity (RH) and a temperature range of 10 to 40 Centigrade.  The W version offers 100% RH and a temperature range 10 to 50 Centigrade.

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