Hydrogen Fluoride 0.5/a, 0.5 - 15 PPM / 10 - 90 PPM, Part # 8103251, 10 Tests 

Application Range

Standard Measuring Range: 0.5 to 15 ppm / 10 to 90 ppm

Number of Strokes n: 10 / 2

Time for Measurement: approx. 2 min / approx. 25 s

Standard Deviation: ± 20 to 30 %

Color Change: blue violet š yellow

Ambient Operating Conditions

Temperature: 10 to 40 °C

Absolute Humidity: 30 to 80 %

Reaction Principle

HF + pH indicator š 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.