Application Range
Standard Measuring Range: 1 to 10 ppm
Number of Strokes n: 10
Time for Measurement: approx. 2 min
Standard Deviation: ± 10 to 15%
Color Change: blue -› yellow
Ambient Operating Conditions
Temperature: 5 to 40 °C
Absolute Humidity: max 15 mg H2O / L
Reaction Principle
HCl + bromophenol blue -> yellow reaction product
Cross Sensitivity
Hydrogen sulfide and sulfur dioxide in the TLV range do not interfere. It is impossible to measure hydrochloric acid in the presence of other mineral acids. Chlorine and nitrogen dioxide are indicated, but with different sensitivities.
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