| Ammonia | NH3 | NO.3M | |
|
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| Performance |
|
Measuring Range |
10 to 50 ppm |
50 to 500 ppm |
500 to 1000 ppm |
|
Number of Pump Strokes |
2 to 5 |
1 |
1/2 |
|
Correction Factor |
1/2 to 1/5 |
1 |
2 |
|
Sampling Time |
45 seconds per pump stroke |
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|
Detecting Limit |
2 ppm (n=5) |
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|
Color Change |
Purple |
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|
Reaction Principle |
Ammonia react with phosphoric acid to change |
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| Coefficient of Variation | 5% (for 50 to 500 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity |
Unnecessary | ||
| Store the tubes in dark and cool place. | |||
| Possible coexisting substances and their interferences | (NOTE) |
|
Substance |
Concentration |
Interference |
Change color by itself |
|
Diamines |
1/8 |
Plus error |
Produce yellow stain |
|
Monoamines |
1/15 |
Plus error |
Produce yellow stain |
|
Carbon dioxide |
1% |
Minus error |
No discoloration |
| Other substance measurable with this detector tube |
|
Substance |
CorrectionFactor |
Pump Strokes |
Measuring Range |
|
Trimethylamine |
0.5 |
1 |
25 to 250 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. |
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