| Sulfur dioxide | SO2 | NO.5La | |
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| Performance |
|
Measuring Range |
0.5 to 1 ppm |
1 to 20 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 |
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Detecting Limit |
0.1ppm (n=8) |
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Color Change |
Blue |
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Reaction Principle |
Sulfur dioxide react with barium chloride to generate |
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| Coefficient of Variation | 10% (for 2 to 10 ppm), 5% (for 10 to 30 ppm) | |||
| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity |
Unnecessary | |||
| Store the tubes at cool and dark place. | ||||
| Possible coexisting substances and their interferences | (NOTE) |
|
Substance |
Concentration |
Interference |
Change color by itself |
|
Carbon monoxide, |
- |
No effect |
No discoloration |
|
Carbon dioxide |
100% |
Faint demarcation |
100% CO2 gives faint demarcation |
|
Nitrogen dioxide |
1:1 |
Plus error |
Produces pale purple discoloration |
|
Hydrogen sulfide |
- |
No effect |
No discoloration |
| Other substance measurable with this detector tube |
|
Substance |
Correction Factor |
pump strokes |
Measuring range |
|
Thionyl chloride |
0.72 |
2 |
1.44 to 21.6 ppm |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 2ppm | 5ppm | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
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