Carbon Monoxide 8/a, 8 - 150 PPM, Part # CH19701, 10 Tests 

Application Range

Standard Measuring Range: 8 to 150 ppm

Number of Strokes n: 10

Time for Measurement: approx. 2 min

Standard Deviation: ± 10 to 15 %

Color Change: white š pale brown

Ambient Operating Conditions

Temperature: 0 to 50 °C

Absolute Humidity: < 50 mg H2O / L

Reaction Principle

5 CO + I2O5 š I + 5 CO2

Cross Sensitivity

Acetylene is also indicated, however, with less sensitivity. Petroleum hydrocarbons, benzene, halogenated hydrocarbons and hydrogen sulfide are retained in the pre-layer. In the case of higher concentrations of interfering hydrocarbons, use should be made of a carbon pre-tube (CH 24 101). Higher concentrations of easily cleavable halogenated hydrocarbons (e.g. trichloroethylene), are liable to form chromyl chloride in the pre-layer which changes the indicating layer to a yellowish-brown. CO determination is impossible in the case of high olefin concentrations