Dräger Tubes For Short Term Measurements: Sulfur Dioxide 20/a
Dräger Safety offer a massive range of short-term gas detection tubes for the measurement of various gases. This particular set of tubes is for (Sulfur Dioxide 20/a).
The tubes come in a pack of 10 tubes and have a shelf life of 2 years.
|Standard Measuring Range:||20 to 200 ppm|
|Number of Strokes n:||10|
|Time for Measurement:||approx. 3 min|
|Standard Deviation:||± 10 to 15 %|
|Colour Change:||brown yellow to white|
Ambient Operating Conditions:
|Temperature:||0 to 40 °C|
|Absolute Humidity||< 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..
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