Application Range
Standard Measuring Range: 20 to 300 ppm / 2 to 40 ppm
Number of Strokes n: 1 / 5
Time for Measurement: approx. 30 s / approx. 3 min
Standard Deviation: ± 15 to 20 %
Color Change: yellow => grey blue
Ambient Operating Conditions
Temperature: 15 to 30 °C
Absolute Humidity: < 25 mg H2O / L
Reaction Principle
a) CCI2=CCI2 + MnO4– -> CI2
b) CI2 + diphenylbenzidine ¨ grey blue reaction product At higher concentrations there may be created a reddish area at the beginning of the indicating layer.
Cross Sensitivity
Other chlorinated hydrocarbons, free halogens and hydrogen halides are also indicated. Petroleum hydrocarbon vapors result in a shortened reading
once they exceed the following concentrations:
50 ppm with 5 strokes or 500 ppm with 1 stroke.