Application Range
Standard Measuring Range: 0.25 to 10 ppm/ 0.1 to 5 ppm
Number of Strokes n: 10 / 20
Time for Measurement: approx. 1 min / approx. 2 min
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
N2H4+ pH Indicator -> blue reaction product
Cross Sensitivity
This tube indicates other basic gases (e.g. organic amines and ammonia), however, with differing sensitivity.