CMS Analyzer - Accurate gas measurements are made easier with the Dräger 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 Dräger-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. Easy to Use, Digital Display of Results, UL, CSA, and MSHA Approved, No Calibration Required, and On-Board Data-Recorder .