Application Range
Standard Measuring Range: 5 to 70 ppm / 50 to 600 ppm
Number of Strokes (n): 10 / 1
Time for Measurement approx. 60 s / 10 s
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 -> 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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