Application Range
Use in Aerotest Alpha, MultiTest med. Int.,
Aerotest Simultaneous HP
Standard Measuring Range: 20 to 250 / 35 to 500 /150 to 1500 mg H2O/m3
Test Volume: 40 L / 20 L
Flow Rate: 4 L / min
Time for Measurement: 10 min. / 5 min. / 2.5 min.
Standard Deviation: ± 15 to 20 %
Color Change: yellow -> red-brown
Ambient Operating Conditions
Temperature: 0 to 40 °C
Humidity: cf. measuring range
Pressure: The tube may only be used for depressurized compressed air
Reaction Principle
H2O + SeO2 + H2SO4 -> reddish brown reaction product
Cross Sensitivity
Alcohols and unsaturated hydrocarbons of high concentrations may cause a diffused discoloration of the indicating layer.