Accurate gas measurements are made easier with the Drager CMS. This new generation spot-check detection device is literally as easy as 1-2-3 to operate. Simply insert one of the 55 chemical specific Drager-CMS-Chips into the Analyzer and follow the instructions on the display as to when to move the slide switch. TWA levels are typically analyzed in 1-2 minutes. Upon completion of this process, the concentration is indicated on the LCD display.