The Dräger Diffusion tubes are direct reading systems used for the determination of time weighted average concentrations over the duration of one to eight hours.
The Diffusion Tubes are very easy to handle. Since these are passive measurement systems, relying on the diffusion of contaminant molecules in air, they do not require a pump. The diffusion tubes are used with a plastic holder which is attached to the clothing (shirt collar, pocket, etc.).
The measurement result can be read directly on the scale printed on the Diffusion Tube following the length of the discoloration.
Dräger-Tube Order Code, Standard Range of Meas. for 1 h, Standard Range of Meas. for 8 h
Ammonia 20/a-D, 8101301, 20 to 1500 ppm, 2.5 to 200 ppm
Butadiene 10/a-D, 8101161, 10 to 300 ppm, 1.3 to 40 ppm
Carbon Dioxide 1%/a-D, 8101051, 1to30 Vol%, 0.13to4 Vol%
Hydrogen Sulfide 10/a-D,6733091, 10to300 ppm, 1.3to40 ppm
Nitrogen Dioxide 10/a-D,8101111, 10to200 ppm, 1.3to25 ppm
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