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简单介绍：
氨气气体检测管3LA Ammonia NH3，Measuring Range 2.5 to 5ppm 5 to 100 ppm 100 to 200ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1/2 1 2 Sampling Time 30 seconds per pump，氨气气体检测管价格
详情介绍：
氨气气体检测管3LA Ammonia NH3 Ammonia No.3LA
NH3
| Performance |
Measuring Range | 2.5to 5ppm | 5 to 100 ppm | 100 to 200ppm |
Number of PumpStrokes | 2 | 1 | 1/2 |
Correction Factor | 1/2 | 1 | 2 |
Sampling Time | 30 seconds per pumpstroke | ||
Detecting Limit | 0.5ppm (n=2) | ||
Color Change | Purple →Yellow | ||
Reaction Principle | 3NH3 + H3PO4 → (NH4)3PO4 | ||
| Coefficient ofVariation | 10% (for5 to 20 ppm), 5% (for 20 to 100 ppm) | ||
| ShelfLife | 3Years | ||
| Correctionsfor temperature & humidity | Temperature correction is necessary | ||
| Store the tubes at cool and darkplace. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Carbondioxide | 1% | Minuserror(20%) | - |
Hydrazine | - | Plus error | Produce yellowdiscoloration |
Amines | 1/15 | Plus error | Discolors at 5ppm(Yellow) |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25ppm | 35ppm | 15 to 28% |