6728491 หลอด Tube วัดสารเคมีประเภท Sulphur Dioxide 0.5/a ยี่ห้อ Draeger
Model : 75-2305
Model (old) : 62-2200-S05
Application Range
Standard Measuring Range: 1 to 25 ppm / 0.5 to 5 ppm
Number of Strokes n: 10 / 20
Time for Measurement: approx. 3 min / approx. 6 min
Standard Deviation: ± 10 to 15 %
Color Change: grey blue -> white
Ambient Operating Conditions
Temperature: 15 to 30 °C
Absolute Humidity: max. 20 mg H2O / L
Reaction Principle
SO2 + I2 + 2 H2O -> H2SO4 + 2 HI
Cross Sensitivity
Measurement is not possible in the presence of H2S. Nitrogen dioxide will shorten the reading.