Draeger CH28101 Hydrogen Sulfide 0.2%/a Detector Tubes (10 tests per box)

Application Range:

• Standard Measuring Range: 0.2 to 7 vol. %
• Number of Strokes n: 1 + 2 desorption strokes in clean air
• Time for Measurement: Approx. 2 min
• Standard Deviation: ± 5 to 10 %
• Color Change: Pale Blue → Black

Ambient Operating Conditions:

• Temperature: 0 to 60 °C
• Absolute Humidity: max. 40 mg H2O / L

Reaction Principle:

• H2S + Cu2+ → CuS + 2 H+

Cross Sensitivity:

• In the presence of sulfur dioxide, the indicating layer can change to a yellowish color, but the hydrogen sulfide measurement is not affected.
• Comparable concentrations of mercaptan will interfere with the reading.