Application Range
Standard Measuring Range: 5 to 30 ppm / 0.5 to 5 ppm
Number of Strokes n: 1 / 5
Time for Measurement: approx. 30 s / approx. 2.5 min
Standard Deviation: ± 15 to 20 %
Color Change: white -> violet
Ambient Operating Conditions
Temperature: 10 to 30 °C
Absolute Humidity: max. 20 mg H2O / L
Reaction Principle
a) CH2=CHCI + CrVI -> Cl2
b) Cl2 + dimethyl naphtidine -> violet reaction product
Cross Sensitivity
100 ppm hydrogen chloride, 20 ppm chlorine, 10 ppm carbon tetrachloride, 10 ppm chloroform or 5 ppm perchloroethylene are not indicated. Trichloroethylene and chlorobenzene are indicated with less sensitivity.
1.1-dichloroethylene is indicated with almost identical sensitivity. Vapors of organic solvents consume part of the oxidation layer so that the resultant reading is somewhat lower.
Examples: a reading of 0.5 ppm vinyl chloride will occur by
5 ppm vinyl chloride + 100 ppm butadiene or
5 ppm vinyl chloride + 10 ppm ethylene