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简单介绍：
氰化氢气体检测管12M Hydrogen cyanide HCN，Measuring Range 17 to 50 ppm 50 to 800 ppm 800 to 2400 ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1/3 1 3 Sampling Time 1 minute per pump，氰化氢气体检测管价格
详情介绍：
氰化氢气体检测管12M Hydrogen cyanide Hydrogen cyanide No.12M
HCN
| Performance |
Measuring Range | 17 to 50 ppm | 50 to 800 ppm | 800 to 2400 ppm |
Number of Pump Strokes | 2 | 1 | 1/2 |
Correction Factor | 1/3 | 1 | 3 |
Sampling Time | 1 minute per pump stroke | ||
Detecting Limit | 1 ppm (n=2) | ||
Color Change | Yellow → Red | ||
Reaction Principle | 2HCN + HgCl2 → Hg(CN)2 + 2HCl | ||
| Coefficient of Variation | 10% (for 50 to 200 ppm), 5% (for 200 to 800 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity | Unnecessary | ||
| Store the tubes at cool and dark place. | |||
| Possible coexisting substances and their interferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Hydrogen sulfide | 500 ppm | Plus error | Red discoloration |
Sulfur dioxide | 500 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% |