Application Range
Use in Aerotest 5000, Simultaneous CO2
Standard Measuring Range: 5 to 200 mg/m3
Test Volume: 50 L
Flow Rate: 2 L / min
Time for Measurement: approx. 25 min
Standard Deviation: ± 15 to 20 %
Color Change: yellow -> reddish-brown
Ambient Operating Conditions
Temperature: 0 to 40 °C
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.
Extension of the measuring range
The following evaluation applies for other volumes:
reading: 5 10 30 50 70 100 150 200 mg H2O/m3
25 L vol.: 10 20 70 110 160 220 340 450 mg H2O/m3
100 L vol.: 2 4 12 20 28 40 60 80 mg H2O/m3
i.e. given a test volume of 25 L the scale reading of 50 mg H2O/m3
corresponds to a measured value of 110 mg H2O/m3
Relative Standard Deviation: ± 25 to 30 % ( 25 L)
± 20 to 25 % (100 L)
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