| Ammonia | NH3 | NO.3La | |
|
|
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| Performance |
|
Measuring Range |
2.5 to 5ppm |
5 to 100 ppm |
100 to 200ppm |
|
Number of Pump Strokes |
2 |
1 |
1/2 |
|
Correction Factor |
1/2 |
1 |
2 |
|
Sampling Time |
30 seconds per pump stroke |
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|
Detecting Limit |
0.5ppm (n=2) |
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|
Color Change |
Purple |
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|
Reaction Principle |
Ammonia react with phosphoric acid to change |
||
| Coefficient of Variation | 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity |
Temperature correction is necessary | ||
| Store the tubes at cool and dark place. | |||
| Possible coexisting substances and their interferences | (NOTE) |
|
Substance |
Concentration |
Interference |
Change color by itself |
|
Carbon dioxide |
1% |
Minus error(20%) |
- |
|
Hydrazine |
- |
Plus error |
Produce yellow discoloration |
|
Amines |
1/15 |
Plus error |
Discolors at 5 ppm(Yellow) |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25ppm | 35ppm | 15 to 28% |
|
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Yellow