Measurements of gases or liquids by proven dry-colorimetric methods of analysis in order achieve the exceptionally low-level impurity detection ranges.
Principals analytical analysis
Dry Colorimetric Detector Technique to detect impurities in samples, is still the most widely used and reliable technique. It utilises an impinger to collect gas in a liquid medium. Chemical reagents are then added to the medium to cause it to change colour in proportion to the concentration of gas present. The resulting colour change is measured by a laboratory spectrophometer and compared to standards. While the Tape Detection System is extremely sensitive to its target gas, it is also very specific to that gas. It will not react to other substances (solvents, hydrocarbons, etc.) often found in process streams. Thus, expensive downtime due to false alarms is virtually eliminated.