Sulfur Dioxide (SO2) Detection Tubes (0.5 to 60 ppm)
Gastec Detection Tube No. 5L1 measures Sulfur Dioxide with a Range of 0.5 to 60 ppm.
- Measuring Range:
- 0.5 to 1 ppm
- 1 to 2 ppm
- 2 to 30 ppm
- 30 to 60 ppm
- Number of Pump Strokes: 8, 4, 2, 1
- Correction Factor: 1/4, 1/2, 1, 2
- Sampling Time: 1 minute per pump stroke
- Detecting Limit: 0.1 ppm (8 pump strokes)
- Color Change: Blue → Yellow
- Corrections for temperature & humidity: Unnecessary
- Reaction Principle:
- SO2 + BaCl2 + H2O → BaSO3 + 2HCl
- HCl + Base → Chloride
- Relative Standard Deviation: 10% (for 2 to 10 ppm), 5% (for 10 to 30 ppm)
- 3 Year Shelf life
- Store the tubes at cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Nitrogen dioxide |
≧ 1/1 |
+ |
Pale purple |
| Carbon monoxide |
|
No |
No |
| Hydrogen sulfide |
|
No |
No |
| Nitric oxide |
|
No |
No |
| Carbon dioxide |
100 % |
Unclear demarcation |
Unclear demarcation at 100 % |
Other substance measurable with this detector tube:
| Substance: |
Correction Factor: |
No of Pump Strokes: |
Measuring Range: |
| Thionyl chloride |
0.72 |
2 |
1.44 to 21.6 ppm |
Sulfur Dioxide (SO2) Detection Tubes (0.5 to 60 ppm)
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