Item #: CH24201
MFG: Draeger
Price: $90.40

Sulfur Dioxide Detection Tubes 20/a (20 - 2000 ppm)

For short-term measurements more than 160 Draeger-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 Range20 to 200 ppm
Number of strokes n:10
Time for Measurementapprox. 3 min.
Standard Deviation± 10 to 15 %
Color Changebrown yellow ──> white
Temperature0 to 40 °C
Absolute Humidity< 30 mg H2O / L
Reaction PrincipleSO2 + I2 + 2 H2O ──> H2SO4 + 2 HI
Cross SensitivityHydrogen sulfide is indicated, with the
same sensitivity. It is impossible to
measure sulfur dioxide in the presence
of hydrogen sulfide. Nitrogen dioxide will
shorten the reading.
Extension of the Measuring
Using n=1+3 desorption strokes, multiply
the reading by 10; the range of
measurement is 200 - 2,000 ppm. The
desorption strokes are to be taken in
clean air (i.e. free of sulfur dioxide)
immediately following the single pump
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