Application Range
Standard Measuring Range: 2 to 30 ppm
Number of Strokes (n): 5
Time for Measurement approx. 1 min
Standard Deviation ±10 to 15 %
Color Change yellow -› blue
Ambient Operating Conditions
Temperature: 10 to 50 °C
Absolute Humidity: <20 mg H2O / L
Reaction Principle
NH3+ pH indicator ä blue reaction product
Cross Sensitivity
Other basic substances such as e.g. organic amines are indicated
as well.
The indication is not affected by:
300 ppm nitrous fumes
2,000 ppm sulfur dioxide
2,000 ppm hydrogen sulfide
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