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 -› pale brow
Ambient Operating Conditions
Temperature: 0 to 50°C
Absolute Humidity: < 50 mg H2O / L
Reaction Principle
5 CO + I2O5 -> 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.
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