Application Range
Standard Measuring Range: 0.2 to 2.0 vol. %
Number of Strokes n: 1
Time for Measurement: approx. 1 min
Standard Deviation: ± 15 to 20%
Color Change: green yellow -› turquoise blue
Ambient Operating Conditions
Temperature: 20 to 40 °C
Absolute Humidity: max 50 mg H2O / L
Reaction Principle
a) H2 + 1/2 O2 -> H20
b) H2O + indicator -> turquoise blue reaction product
Cross Sensitivity
No interference by:
0.1 vol. % acetylene
6 vol. % alcohol
6 vol. % ammonia
0.5 vol. % carbon monoxide
Cross Sensitivity
The indicating layer is heated up by hydrogen concentrations of more than 10 vol. %. The air sample must not contain additional flammable substances whose ignition temperature is below 250 °C/ 482 °F as this will cause an explosion risk.