Application Range
Standard Measuring Range: 0.5 to 10 vol. %
Number of Strokes (n): 1 + 1 desorption stroke
in clean air
Time for Measurement 20 s per stroke
Standard Deviation ±10 to 15 %
Color Change yellow -› vioret
Ambient Operating Conditions
Temperature: 10 to 30 °C
Absolute Humidity: 3 to 12 mg H2O / L
Reaction Principle
NH3+ pH indicator -> purple reaction product
Cross Sensitivity
Other basic substances such as e.g. organic amines are indicated as well.
Extension of the Measuring Range
Using n = 10 + 1 desorptionstroke in clean air divide the reading by 10; the measuring range will be 0.05 to 1 % by vol.
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