Application Range
Standard Measuring Range: 20 to 250 ppm / 2 to 50 ppm
Number of Strokes n: 3 / 5
Time for Measurement: approx. 1.5 min / 2.5 min
Standard Deviation: ± 10 to 15 %
Color Change: pale grey -> orange
Ambient Operating Conditions
Temperature: 10 to 40 °C
Absolute Humidity: 5 to 15 mg H2O / L
Reaction Principle
Cl2 + o-tolidine -> orange reaction product
Cross Sensitivity
Other chlorinated hydrocarbons are indicated, but with different sensitivities Free halogens and hydrogen halides in the TLV range are also indicated. It is impossible to measure trichloroethylene in the presence of these
substances. Petroleum hydrocarbons cause low readings.
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