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, such as:
- Determining and measuring concentration peaks
- Measuring personal exposure in the inhalation area
- Detecting leaks in pipelines, gas installations etc.
- Air analysis in sewers, shafts and confined spaces
|Standard Measuring Range:
||20 to 200 ppm
|Number of strokes n:
|Time for Measurement:
||approx. 3 min
||± 10 to 15 %
||brown yellow ──> white
||0 to 40 °C
||< 30 mg H2O / L
||SO2 + I2 + 2 H2O ──> H2SO4 + 2 HI
||Hydrogen 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 Range
||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 stroke.