Trace gas analysis by diode laser cavity ring-down spectroscopy

The first commercial analyzer based on cavity ringdown spectroscopy (CRDS) was developed to perform fast and reliable analysis of ultra trace gas impurities. The complete analytical system, the MTO-1000, is capable of measuring moisture from 200 parts-per-trillion (PPT) to 5 ppm. Trace moisture test data will be presented to demonstrate the speed of response, sensitivity, and accuracy of the analyzer.