Performance
| Measuring Range |
0.1 to 10 ppm |
| Sampling Hours |
1 to10 hours |
| Detecting Limit |
0.02 ppm (10 hours) |
| Colour Change |
Pink → Yellow |
| Reaction Principle |
2NH3 + H2SO4 → (NH4)2SO4 |
| Coefficient of Variation |
10% (for 1 to 10 ppm-hr) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature and Humidity correction is necessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Amines |
|
+ |
Yellow |
| Hydrazine |
|
+ |
Yellow |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
Sampling Time |
Measuring Range |
| Methyl amine |
1.9 |
0.19 to 19 ppm |
1 to 10 hours |
| Trimethyl amine |
2.3 |
0.23 to 23 ppm |
1 to 10 hours |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
35 ppm |
15 to 28% |
