Application Range
Standard Measuring Range: 0.3 to 5 ppm
Number of Strokes n: 20
Time for Measurement: approx. 8 min
Standard Deviation: ±10 to 15%
Color Change: pale green-grey -› brown
Ambient Operating Conditions
Temperature: 0 to 40°C
Absolute Humidity: < 15 mg H2O / L
Reaction Principle
Cl2 + o-tolidine -> brown reaction product
Cross Sensitivity
Bromine is indicated with the same sensitivity, but with a paler discoloration. Chlorine dioxide is indicated with different sensitivity.
Nitrogen dioxide is indicated as well, but with a paler discoloration and lower sensitivity.
Extension of the Measuring Range
Using n = 10 strokes, multiply the reading by 2, the measuring range will be 0.6 to 10 ppm.
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