Ozone 10/a, 20 - 300 PPM, Part # CH21001, 10 Tests 

Application Range

Standard Measuring Range: 20 to 300 ppm

Number of Strokes n: 1

Time for Measurement: approx. 20 s

Standard Deviation: ± 10 to 15 %

Color Change: greenish blue š yellow

Ambient Operating Conditions

Temperature: 0 to 40 °C

Absolute Humidity: 2 to 30 mg H2O / L

Reaction Principle

O3 + indigo š isatine

Cross Sensitivity

No interference by:

1 ppm sulfur dioxide

1 ppm chlorine

1 ppm nitrogen dioxide.

Higher concentrations of chlorine and nitrogen dioxide discolor the indicating layer a diffuse yellowish grey