详情介绍：
氨气气体检测管3HM Ammonia NH3
Ammonia No.3HM
NH3
| Performance |
MeasuringRange | 0.05 to 1.6% | 1.6 to 3.52% |
Number of Pump Strokes | 1 | 1/2 |
CorrectionFactor | 1 | 2.2 |
SamplingTime | 1 minute per pumpstroke | |
DetectingLimit | 0.01% (n=1) | |
ColorChange | Pink → Yellow | |
ReactionPrinciple | 2NH3 + H2SO4 → (NH4)2SO42NH3 + H2SO4 → (NH4)2SO4 | |
| Coefficient ofVariation | 10% (for0.05 to 0.4 %), 5% (for 0.4 to 1.6 ppm) | |
| ShelfLife | 3Years | |
| Correctionsfor temperature & humidity | Unnecessary | |
| Store the tubes at cool and darkplace. | ||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Hydrazine | - | Plus error | Discolor to yellowstain |
Pyridine | - | Plus error | Discolor to yellowstain |
Amines other thanaromatic amines | - | Plus error | Discolor to yellowstain |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25ppm | 35ppm | 15 to 28% |
