feedsenclosure-tn-179 water vapor tube color
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8/13/2019 FeedsEnclosure-TN-179 Water Vapor Tube Color
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8/13/2019 FeedsEnclosure-TN-179 Water Vapor Tube Color
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Technical Note TN-179rev 1 wh.11-04
2RAE Systems Inc.3775 N. First St., San Jose, CA 95134-1708 USAPhone: +1.888.723.8823Email: raesales@raesystems.comWeb Site: www.raesystems.com
Figure 3. Effect of temperature on the 120-20tube.
Figure 3 shows that the color stain for water vapor isgreener at higher temperatures and tends towards
purple as the temperature is lowered. Therefore, thedistinction between methanol and water vaporresponse is more clear at lower temperatures.
Note: For more information on RAE Systemscolorimetric tubes and techniques, refer to GasDetection Tubes & Sampling Handbook (p/n 010-4003-000), available from RAE Systems(www.raesystems.com).
0C/32F H O: 20 lbs/MMCF Methanol: 100 m
20C/68F H 2O: 20 lbs/MMCF Methanol: 100 m
30C/86F H O: 20 lbs/MMCF Methanol: 100 m
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