For Draeger apparatus. For short-term measurements more than 160 DrŠeger Tubes are available to measure spot concentrations of specific gases. A wide range of different gases and vapors can be detected and measured; Determining and measuring concentration peaks, Measuring personal exposure in the inhalation area, Detecting leaks in pipelines, gas installations etc., and Air analysis in sewers, shafts and confined spaces. Other gas detecting tubes are available. Please inquire for descriptions and prices. * NIOSH Certified tube. 10 tubes/pkg.