Application Range
Standard Measuring Range: 1 to 25 ppm
Number of Strokes n: 10
Time for Measurement: approx. 3 min
Standard Deviation: ± 10 to 15 %
Color Change: grey blue -> white
Ambient Operating Conditions
Temperature: 15 to 25 °C
Absolute Humidity: 3 to 20 mg H2O / L
Reaction Principle
SO2 + I2 + 2 H2O -> H2SO4 + 2 HI
Cross Sensitivity
Hydrogen sulfide in the TLV range is retained in the pre-layer and does not interfere. Nitrogen dioxide will shorten the reading
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