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氰化氢气体检测管12LL Hydrogen cyanide，Measuring Range 0.2 to 7 ppm Number of Pump Strokes 2 Correction Factor 1 Sampling Time 2 minutes per pump stroke Detecting Limit 0.05 ppm氰化氢气体检测管价格
详情介绍：
氰化氢气体检测管12LL Hydrogen cyanide Hydrogen cyanide No.12LL
HCN
| Performance |
Measuring Range | 0.2 to 7 ppm |
Number of Pump Strokes | 2 |
Correction Factor | 1 |
Sampling Time | 2 minutes per pump stroke |
Detecting Limit | 0.05 ppm (n=2) |
Color Change | Yellow → Pink |
Reaction Principle | 2HCN + HgCl2 → Hg(CN)2 + 2HCl |
| Coefficient of Variation | 10% (for 0.2 to 2 ppm), 5% (for 3 to 7 ppm) |
| Shelf Life | 2 Years |
| Corrections for temperature & humidity | Humidity correction is necessary |
| Store the tubes at cool and dark place. | |
| Possible coexisting substances and their interferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Hydrogen sulfide | 1 ppm | Plus error | Red discoloration |
Sulfur dioxide | 1 ppm | Plus error | Red discoloration |
| Other substance measurable with this detector tube |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| - | C 4.7 ppm | 5.6 to 40% |