Application Range
Standard Measuring Range: 0.02 to 1 ppm / 0.02 to 0.6 ppm
Number of Strokes n: 20 / 40
Time for Measurement: approx. 6 min / approx. 12 min
Standard Deviation: ± 10 to 15 %
Color Change: white -> red
Ambient Operating Conditions
Temperature: 0 to 40 °C
Absolute Humidity: 3 to 15 mg H2O / L
Reaction Principle
COCI2 + aromatic amine -> red reaction product
Cross Sensitivity
Chlorine and hydrochloric acid lead to plus errors and, at higher concentrations, to bleaching of the indicating layer. Concentrations of phosgene above 30 ppm will also lead to bleaching of the indicating layer.
Additional Information
High concentrations of phosgene will be not indicated!