| Sulfur dioxide | SO2 | NO.5H | |
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| Performance |
|
Measuring Range |
0.05 to 0.5% |
0.5 to 4.0% |
4.0 to 8.0% |
|
Number of Pump Strokes |
10 to 2 |
1 |
1/2 |
|
Correction Factor |
1/2 to 1/10 |
1 |
2 |
|
Sampling Time |
1 minute per pump stroke |
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Detecting Limit |
0.01% (n=10) |
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|
Color Change |
Orange |
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Reaction Principle |
Sulfur dioxide reduces chromic acid to form |
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| Coefficient of Variation |
10% (for 0.5 to 1 %), 5% (for 1 to 4 %) |
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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) |
|
Substance |
Concentration |
Interference |
Change color by itself |
|
Carbon monoxide |
- |
No effect |
No discoloration |
|
Carbon dioxide |
- |
No effect |
No discoloration |
|
Nitrogen dioxide |
- |
No effect |
No discoloration |
|
Hydrogen sulfide |
500 ppm |
Plus error |
No discoloration |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 2ppm | 5ppm | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Green