Sulfur Dioxide (SO2) Detection Tubes (0.05 to 10 ppm)

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Item #: 5Lb
MFG: GasTec

UOM: Box of 10

$84.81 Was: $96.36
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Sulfur Dioxide (SO2) Detection Tubes (0.05 to 10 ppm)

Gastec Detection Tube No. 5Lb measures Sulfur Dioxide with a Range of 0.05 to 10 ppm.

  • Measuring Range:
    • 0.05 to 0.1 ppm
    • 0.1 to 0.2 ppm
    • 0.2 to 5 ppm
    • 5 to 10 ppm
  • No. of Pump Strokes: 8, 4, 2, 1
  • Correction Factor: 1/4, 1/2, 1, 2
  • Sampling Time: 1 minute per pump stroke
  • Detecting Limit: 0.01 ppm (8 pump strokes)
  • Changes from Yellowish Green to Yellow
  • Reaction Principle:
    • SO2 + BaCl2 + H2O → BaSO3 + 2HCl
    • HCl + Base → Chloride
  • Relative Standard Deviation: 10 % (for 0.2 to 1 ppm), 5 % (for 1 to 5 ppm)
  • 3 Year Shelf Life
  • Store the tubes at cool and dark place.
  • If sulfur dioxide coexists with carbon dioxide, an unclear demarcation will result. In this case, use No. 5LC detector tube.

Possible coexisting substances and their interferences:

Substance Concentration Interference Changes color by itself to
Nitrogen dioxide ≧ 1 ppm Unclear demarcation Yellow
Carbon monoxide No No
Hydrogen sulfide No No
Nitric oxide No No
Carbon dioxide 100 % + Yellow