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Draeger Tube, Sulfur Dioxde 20/A 20-2000ppm, Box of 10

Draeger Tube, Sulfur Dioxde 20/A 20-2000ppm, Box of 10

Availability: May direct ship from manufacturer.
Product Code: CH24201

Draeger Tube - Sulfur Dioxide 20/a
Order No. CH 24 201

Application Range
Standard Measuring Range 20 to 200 ppm
Number of Strokes n: 10
Time for Measurement: approx. 3 minutes
Standard Deviation: ± 10 to 15%
Color Change: brown yellow to white
Ambient Operating Conditions
Temperature: 0 to 40° C ~ 32 to 104° F
Absolute Humidity: < 30 mg H2O /L
Reaction Principle
SO2 + I2 + 2 H2O → H2SO4 + 2 HI
Cross Sensitivity
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..
Extenstion 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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