Application Range
Standard Measuring Range: 5 to 200 ppm
Number of Strokes n: 10
Time for Measurement: approx. 3 min
Standard Deviation: ±10 to 15%
Color Change: blue -› yellowish-grey
Ambient Operating Conditions
Temperature: 10 to 40°C
Absolute Humidity: 3 to 15 mg H2O / L
Reaction Principle
a) C6H5Cl + CrVI -> HCl
b) HCl + bromophenol blue -> yellow reaction productCross Sensitivity
Other chlorinated hydrocarbons are indicated as well, but with different sensitivities. Methylene chloride does not affect the indication. Chlorine and hydrogen chloride in the TLV range are absorbed in the pre-layer, but in such concentrations do not affect the indication.
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