Draeger CH19701 Carbon Monoxide 8/a Detector Tubes (10 tests per box)

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 Brown

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.