| Nitrogen dioxide | NO2 | NO.9L | |
|
|
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| Performance |
|
Measuring Range |
0.5 to 30 ppm |
30 to 125 ppm |
|
Number of Pump Strokes |
2 |
1 |
|
Correction Factor |
1 |
By Scale |
|
Sampling Time |
1 minute per pump stroke |
|
|
Detecting Limit |
0.1 ppm (n=2) |
|
|
Color Change |
White |
|
|
Reaction Principle |
Nitrogen dioxide reduces o-tolidine to form |
|
| Coefficient of Variation |
10% (for 0.5 to 3 ppm), 5% (for 3 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 |
|
Ammonia |
- |
No effect |
No discoloration |
|
Carbon monoxide |
- |
No effect |
No discoloration |
|
Carbon dioxide |
- |
No effect |
No discoloration |
|
Nitric oxide |
50 ppm |
Faint demarcation |
Pale red color |
|
Bromine, Chlorine |
1/5 times |
Plus error |
Yellowish orange color |
|
Sulfur dioxide |
10 ppm |
Bleach the discoloration |
No discoloration |
|
Organic vapors |
- |
No effect |
No discoloration |
| Other substance measurable with this detector tube |
|
Substance |
Correction Factor |
Pump Strokes |
Measuring Range |
|
Iodine |
0.4 |
2 |
0.2 to 12 ppm |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 3ppm | 5ppm | - |
|
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Yellowish Orange