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简单介绍：
硫化氢气体检测管4HP Hydrogen sulphide H2S，Measuring Range 0.25 to 0.5% 0.5 to 10 % 10 to 20 %硫化氢气体检测管4HP Hydrogen sulphide H2S，硫化氢气体检测管价格
详情介绍：
硫化氢气体检测管4HP Hydrogen sulphide
Hydrogen sulphide No.4HP
H2S
| Performance |
Measuring Range | 0.25 to 0.5% | 0.5 to 10 % | 10 to 20 % |
Number of Pump Strokes | 2 | 1 | 1/2 |
Correction Factor | 1/2 | 1 | 2 |
Sampling Time | 3 minutes per pump stroke | ||
Detecting Limit | 0.1% (n=2) | ||
Color Change | Pale Blue → Blackish Brown | ||
Reaction Principle | H2S + CuSO4 → CuS + H2SO4 | ||
| Coefficient of Variation | 10% (for 0.5 to 3 %), 5% (for 3 to 10 %) | ||
| 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 |
Ammonia | - | Produces blackish brown and dark blue color | Produces dark blue stain |
Sulfur dioxide | 2.5% | Minus error | No discoloration |
Mercaptans | 5 % | Plus error | No discoloration |
| Other substance measurable with this detector tube |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 10ppm | 15ppm | 4.0 to 44% |