MSA/AUER detector tubes are a reliable method of testing for more than 120 hazardous gases and vapors. Detector tubes are flame sealed glass tubes containing treated adsorbent granules that react with a specific compound or group of compounds, causing the adsorbent to change color. A sample is collected by attaching the detector tube to a special bellows-type pump that draws a known volume of air with each stroke. After sampling, the length of adsorbent bed that has undergone the color change is measured from a scale printed on the tube, allowing direct reading of the vapor concentration no extraction, no analysis, and no calculations are required. Because they are simple to use, detector tubes have been used in a broad range of applications. They are particularly useful when quick screening is required, such as in Haz-Mat Response, and in industrial situations in which specific groups of compounds are monitored regularly.
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