Chlorine 50/a, 50 - 500 PPM, Part # CH20701, 10 Tests 

Application Range

Standard Measuring Range: 50 to 500 ppm

Number of Strokes n: 1

Time for Measurement: approx. 20 s

Standard Deviation: ± 10 to 15 %

Color Change: grey green š orange brown

Ambient Operating Conditions

Temperature: 10 to 40 °C

Absolute Humidity: < 40 mg H2O / L

Reaction Principle

Cl2 + o-tolidine š orange brown reaction product

Cross Sensitivity

Bromine is indicated with the same sensitivity, but with a higher standard deviation ± 25 to 30 %. Chlorine dioxide and nitrogen dioxide are indicated as well, but with different sensitivities.