Application Range
Standard Measuring Range: 2 to 40 ppm
Number of Strokes n: 5
Time for Measurement: approx. 30 sec
Standard: ± 20 to 30 %
Color Change: white -› pink
Ambient Operating Conditions
Temperature: 0 to 40 °C
Absolute Humidity: 3 to 15 mg H2O / L
Reaction Principle
HCHO + C6H4(CH3)2 + H2SO4 -> quinoid reaction products
Cross Sensitivity
Styrene, vinyl acetate, acetaldehyde, acrolein, diesel fuel and furfuryl alcohol are indicated with a yellowish brown discoloration. 500 ppm octane, 5 ppm nitric oxide and 5 ppm nitrogen dioxide have no effect.
Extension of the Measuring Range
The reagent ampoule must be broken before carrying out the measurement.
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