| Sulfur dioxide | SO2 | NO.5L | |
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| Performance |
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Measuring Range |
1.25 to 2.5ppm |
2.5 to 5ppm |
5 to 100ppm |
100 to 200ppm |
|
Number of Pump Strokes |
4 |
2 |
1 |
1/2 |
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Correction Factor |
1/4 |
1/2 |
1 |
2 |
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Sampling Time |
1 minute per pump stroke |
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Detecting Limit |
0.25ppm (n=4) |
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Color Change |
Blue |
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Reaction Principle |
Sulfur dioxide reacts with barium chloride to generate |
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| Coefficient of Variation |
10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm) |
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| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity |
Unnecessary | |||
| Store the tubes at cool and dark place. | ||||
| Possible coexisting substances and their interferences | (NOTE) |
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Substance |
Concentration |
Interference |
Change color by itself |
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Carbon monoxide, |
- |
No effect |
No discoloration |
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Carbon dioxide |
- |
No effect |
No discoloration |
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Nitrogen dioxide |
1:1 |
Plus error |
Produces light purple discoloration |
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Hydrogen sulfide |
- |
No effect |
No discoloration |
| 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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