详情介绍：
氨气气体检测管3M Ammonia NH3 Ammonia No.3M
NH3
| Performance |
MeasuringRange | 10 to 50 ppm | 50 to 500 ppm | 500 to 1000ppm |
Number of Pump Strokes | 2 to 5 | 1 | 1/2 |
CorrectionFactor | 1/2 to 1/5 | 1 | 2 |
SamplingTime | 45 seconds per pumpstroke | ||
DetectingLimit | 2 ppm (n=5) | ||
ColorChange | Purple →Yellow | ||
ReactionPrinciple | 3NH3 + H3PO4 → (NH4)3PO4 | ||
| Coefficient ofVariation | 5% (for50 to 500 ppm) | ||
| ShelfLife | 3Years | ||
| Correctionsfor temperature & humidity | Unnecessary | ||
| Store the tubes in dark and coolplace. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Diamines | 1/8 | Plus error | Produce yellowstain |
Monoamines | 1/15 | Plus error | Produce yellowstain |
Carbondioxide | 1% | Minus error | Nodiscoloration |
| Othersubstance measurable with this detector tube |
Substance | CorrectionFactor | PumpStrokes | MeasuringRange |
Trimethylamine | 0.5 | 1 | 25 to 250ppm |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25ppm | 35ppm | 15 to 28% |
