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简单介绍：
硫化氢检测管4D H2S Hydrogen sulphide，Measuring Range 0.2 to 200 ppm Sampling Hours 1 to 48 hours Detecting Limit 0.2 ppm (10 hours) Color Change硫化氢检测管价格
详情介绍：
硫化氢检测管4D H2S Hydrogen sulphide Hydrogen sulphide No.4D
H2S
| Performance |
Measuring Range | 0.2 to 200 ppm |
Sampling Hours | 1 to 48 hours |
Detecting Limit | 0.2 ppm (10hours) |
Color Change | White→ Brown |
Reaction Principle | H2S + Pb(CH3COO)2 → PbS +2CH3COOH |
| Coefficient ofVariation | 10%(for 10 to 200 ppm-hr) |
| ShelfLife | 3 Year |
| Correctionsfor temperature & humidity | Unnecessary |
| Store the tubes atcool and dark place. | |
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Nitrogendioxide | 5 ppm | - | No |
| Ammonia | 25 ppm | No | No |
| Chlorine | 1 ppm |
No | No |
| sulphur dioxide | 5 ppm | No | No |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 10 ppm | 15 ppm | 4.0to 44% |