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

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: