Application Range
Standard Measuring Range: 10 to 40 ppm
Number of Strokes n: 10
Time for Measurement: approx. 3 min
Standard Deviation: ± 20 to 30%
Color Change: yellow -› grey blue
Ambient Operating Conditions
Temperature: 15 to 35°C
Absolute Humidity: 3 to 12 mg H2O / L
Reaction Principle
a) Dimethylformamide + NaOH -> NH3
b) NH3 + pH-indicator -> greyblue reaction product
Cross Sensitivity
Other basic substances, e.g. ammonia, organicsamines and hydrazine are also indicate, however, with differing sensitivity.