Application Range
Standard Measuring Range: 20 to 500 ppm
Number of Strokes n: 2
Time for Measurement: approx. 30 sec
Standard : ± 10 to 15 %
Color Change: grey -> red brown
Ambient Operating Conditions
Temperature: 15 to 40 °C
Absolute Humidity: max 40 mg H2O / L
Reaction Principle
a) NO + CrVI -> NO2
b) NO2 + o-diphenylbenzidine ¨-> red brown reaction product
Cross Sensitivity
There is no influence of chlorine and ozone, if these gases are in range of their TLVs. Higher oncentrations are indicated with different insitivities
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