Item #: 6724501
MFG: Draeger
Price: $211.00
$211.00

Toluene Diisocyanate Detection Tubes 0.02/A (0.02 - 0.2 ppm)

For short-term measurements more than 160 Drager-Tubes are available to measure the so-called spot concentrations of specific gases. A wide range of different gases and vapours can be detected and measured, e.g.: 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.

Contains 10 tubes

Standard Measuring Range0.02 to 0.2 ppm 
Discoloration compared to color comparison
tube.
Number of strokes n:25
Time for Measurementapprox. 20 min.
Standard Deviation± 30 %
Color Changewhite ──> orange
Temperature15 to 30 °C
Absolute Humidity< 20 mg H2O / L
Reaction Principlea) Pyridyl-pyridinium chloride + NaOH  ──>
    Glutaconaldehyde sodium oletate
b) 2,4-TDI (also for 2,6-TDI) + HCl ──>
    Aromatic amine
c) Aromatic amine + Glutaconaldehyde ──>
    orange reaction product
Cross SensitivityOther isocyanates are not indicated. 
No interference by:
5 ppm aniline
10 ppm benzylamine
5 ppm toluene
20 ppm benzene
Mercaptans also discolor the indicating layer.
Additional InformationBefore carrying out the measurement the lower
reagent ampoule must be broken and the liquid
transferred to the indication layer, so that it
changes color to yellow. Next, the upper reagent
ampoule must be broken and the liquid
transferred to the indication layer, so that it returns
to a white color. After performing 25 pump 
strokes wait 15 minutes before evaluation the
indication.
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