Application Range
Standard Measuring Range: 0.1 to 3 ppm
Number of Strokes n: 100
Time for Measurement: approx. 20 min
Standard Deviation: ± 10 to 15 %
Color Change: yellow -> orange
Ambient Operating Conditions
Temperature: 10 to 30 °C
Absolute Humidity: 3 to 15 mg H2O / L
Reaction Principle
SO2 + Na2[HgCI4] + methyl red -> Na2[Hg(SO3)2] + 4 HCI
Cross Sensitivity
It is impossible to measure sulfur dioxide in the presence of other acidic gases.