| Sulfur dioxide | SO2 | NO.5L‚‚ | |
|
|
|||
| Performance |
|
Measuring Range |
0.05 to 0.1 ppm |
0.1 to 0.2 ppm |
0.2 to 5.0 ppm |
5.0 to 10.0 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 |
0.01ppm (n=8) |
|||
|
Color Change |
Yellowish green |
|||
|
Reaction Principle |
Sulfur dioxide reacts with barium chloride to generate |
|||
| Coefficient of Variation | 10% (for 0.2 to 1 ppm), 5% (for 1 to 5 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% |
Plus error |
100% CO2 gives yellow discoloration |
|
Nitrogen dioxide |
1 ppm |
Faint discoloration |
Produces yellow discoloration |
|
Hydrogen sulfide |
- |
No effect |
No discoloration |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 2ppm | 5ppm | - |
|
|
| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Yellow