| Ammonia | NH3 | NO.3L | |
|
|
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| Performance |
|
Measuring Range |
0.5to1 ppm |
1 to 30 ppm |
30 to 78 ppm |
|
Number of Pump Strokes |
2 |
1 |
1/2 |
|
Correction Factor |
1/2 |
1 |
2.6 |
|
Sampling Time |
1 minute per pump stroke |
||
|
Detecting Limit |
0.2 ppm (n=2) |
||
|
Color Change |
Pink |
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|
Reaction Principle |
Ammonia neutralizes sulfuric acid to change |
||
| Coefficient of Variation | 10% (for 1 to 10 ppm), 5% (for 10 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 |
|
Carbon dioxide |
1% |
-(20%) |
- |
|
Hydrazine |
- |
+ |
Produces yellow discoloration |
|
Amines |
1/15 |
+ |
Discolors yellow at 5 ppm |
| 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