Application Range
Standard Measuring Range: 0.5 to 15 ppm / 10 to 90 ppm
Number of Strokes n: 10 / 12
Time for Measurement: approx. 2 min / approx. 25 s
Standard Deviation: ± 20 to 30%
Color Change: blue violet -> yellow
Ambient Operating Conditions
Temperature: 10 to 40 °C
Absolute Humidity: 30 to 80 %
Reaction Principle
HF + pH indicator -> yellow reaction product
Cross Sensitivity
Other mineral acids, e.g. hydrochloric acid or nitric acid, are indicated. Alkaline gases, e.g. ammonia, causes minus results or prevents an indication.