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GASTEC ® Color Dosimeter Tubes

GASTEC Color Dosimeter Tubes provide reliable, on-the-spot Time-Weighted Average (TWA) monitoring of worker exposure to gases and vapors. Simple-to-use and easy-to-read, snap off the pre-scored end of the tube and insert it into a tube holder. Place the tube on a worker near the breathing zone, except when measuring carbon dioxide (see second Tech Tip below). No pump, chart, or analysis is needed. Read the printed calibrated scale on the tube for exposure measurement in parts-per-million-hours (ppm-hours). Divide the reading by hours sampled for ppm levels.
  • Easy-to-use
    On-the-spot readings with no interpretation, long calculations, charts, or pumps

  • Sampling flexibility
    Perform STEL, TWA, or long-term sampling up to 24 hours

  • Economical
GASTEC Color Dosimeter Tube 810 Series in Dosi Tube Holder Cat. No. 810-7015403
Dosimeter Tube in
Dosi Tube Holder
  • Accurate and Reliable
    Exceed NIOSH and OSHA minimum performance criteria for TWA measurements with dosimeter tubes

  • Small and lightweight tube holder
    Conveniently clips to a worker's collar or shirt for secure sampling

Download Gastec price list (PDF)

Tubos Colorimétricos Dosímetros Español Folleto

TechTip logo

  • When using passive color tubes, the time-weighted average (TWA) can be calculated at any time during the measurement period by simply dividing the length of the tube reading (in ppm-hours) by the elapsed sampling time (in hours). .

  • To avoid overstating carbon dioxide levels because of exhalation, place passive color tubes for carbon dioxide at the waist instead of the normal position in the breathing zone.

Ordering Information                  

Chemical hazard Measuring range
(ppm-hrs) 		No. Test
Cat. No.
Acetaldehyde †* 0.1 - 20 10
Acetaldehyde †* 1.2 - 360 10
Acetaldehyde †* 4 - 1200 10
Acetic acid 0.5 -100 10
Acetic anhydride † 0.45 - 90 10
Acetone †* 1.4 - 420 10
Acetone* 5.0 - 1500 10
Ammonia 0.1 -10 10
Ammonia 2.5 - 1000 10
Benzene † 2.4 - 600 10
1,3-Butadiene 1.3 - 200 10
Carbon dioxide 0.02 to 12 %-hr 10
Carbon monoxide 1.04 -2000 10
Carbon monoxide* 0.4 - 400 10
Chlorine 0.08 - 100 10
Chlorine †* 2.4 - 240 10
Cumene † 3.4 - 850 10
1,2 Dichloroethylene † 3.9 - 600 10
1,2 Dichloroethylene †* 6 - 600 10
Dimethyl amine † 1.9 - 750 10
N,N-Dimethylethyl amine † 4 - 1600 10
Ethyl alcohol 100 - 25000 10
Ethyl benzene † 2.8 - 700 10
Ethylene † 1.56 - 240 10
Ethylene dichloride † 3.9 - 600 10
Formaldehyde* 0.1 - 20 10
Formic acid † 0.55 - 110 10
Furfural †* 0.2 - 40 10
Hydrazine † 0.05 - 650 10
Hydrogen chloride 1 -100 10
Hydrogen chloride †* 1.8 - 180 10
Hydrogen cyanide 1 - 200 10
Hydrogen fluoride 1 -100 10
Hydrogen peroxide 0.5 - 40 10
Hydrogen sulfide 0.2 - 200 10
Isoprene † 2.6 - 400 10
Methyl amine † 0.19 - 19 10
Methyl ethyl ketone †* 6.5 - 1950 10
Methyl ethyl ketone* 2 - 600 10
Methyl ethyl ketone †* 0.125 - 25 10
Methyl isobutyl ketone †* 4 - 1200 10
Methyl isobutyl ketone †* 11.5 - 3450 10
Nitric acid † 0.32 - 32 10
Nitric acid † 0.8 - 80 10
Nitrogen dioxide* 0.01 - 3 10
Nitrogen dioxide* 0.1 - 30 10
Styrene  26 - 6500 10
Sulfur dioxide 0.2 -100 10
Sulfur dioxide 10 - 600 10
Tetrachloroethylene 1.5 - 150 10
Tetrachloroethylene* 3 - 150 10
Toluene 2 - 500 10
Trichloroethylene* 3 - 300 10
Triethylamine † 5.3 - 2100 10
Trimethylamine † 0.23 - 23 10
Vinyl chloride † 1.56 - 240 10
Xylene † 3.4 - 850 10
Dosi Tube Holder 3

† Secondary application for tube; requires correction factor. See operating instructions for details.
* Store tubes at 40-50 F (5 to10 C)

Download Gastec price list (PDF)

Tubos Colorimétricos Dosímetros Español Folleto

This page was last modified March 21, 2011
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