Sulphur Dioxide 0.5/a, 1 - 25 PPM / 0.5 - 5 PPM, (6728491)
Sulphur Dioxide 0.5/a, 1 - 25 PPM / 0.5 - 5 PPM, Part # 6728491, 10 Tests
Application Range
Use in MultiTest med. Int.
Standard Measuring Range: 1 to 25 ppm / 0.25 to 1 ppm
Test Volume: 1 L / 2 L
Flow Rate: 0.2 L / 0.2 L / min
Time for Measurement: 5 min / 10 min
Standard Deviation: ± 25 %
Color Change: greyblue white
Ambient Operating Conditions
Temperature: 15 to 30 °C
Absolute Humidity: max. 20 mg H2O / L
Pressure: The tube may only be used for depressurized compressed air
Reaction Principle
Starch SO2 + I2 + 2 H2O H2SO4 + 2 HI
Cross Sensitivity
Hydrogen sulfide is indicated as well but with different sensitivity. Nitrogen dioxide will shorten the reading.
Evaluation
Measuring range 1 to 25 ppm: Reading on the (n=10) scale = ppm
Measuring range 0.25 to 1 ppm: Reading on the (n= 20) scale x 0.5 = ppm SO2 (applies only for scale range
0.5 to 2 ppm)