Dräger-Tube Carbon Monoxide 8/a - PN: CH19701

Dräger-Tube Carbon Monoxide 8/a (10)PN: CH19701 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 to pale brown  Ambient Operating Conditions Temperature 0 to 50 °C Absolute Humidity < 50 mg H2O/L   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 higher concentration of interfering hydrocarbons, use should be made of a carbon pre-tube (CH 24 101). Higher concentration of easily cleavable halogenated hydrocarbons(e.g. trichloroethylene),  are liable to form  chromyl chloride in the pre-layer which changes the indicating layer to yellow-brown . CO determination is impossible in the case of high olefin concentration .