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简单介绍：
四氯乙烯检测管133MTetrachloroethylene，二甲苯气体检测管123L Xylene，水蒸汽检测管6LLP Water vapour，1,1-二氯乙烯检测管130L Vinylidene chloride，氯乙烯检测管131LB Vinyl chloride
详情介绍：
四氯乙烯检测管133MTetrachloroethylene
Tetrachloroethylene No.133M
Cl2C:CCl2
| Performance |
Measuring Range | 2 to 5 ppm | 5 to 100 ppm | 100 to 250 ppm |
Number of PumpStrokes | 2 | 1 | 1/2 |
Correction Factor | 0.4 | 1 | 2.5 |
Sampling Time | 1 minute per pumpstroke | ||
Detecting Limit | 0.4 ppm (n=2) | ||
Color Change | Yellow → Reddishpurple | ||
Reaction Principle | Cl2C:CCl2 + PbO2 + H2SO4 → HCl | ||
| Coefficient ofVariation | 10% (for5 to 20 ppm), 5% (for 20 to 100 ppm) | ||
| ShelfLife | 2Years | ||
| Correctionsfor temperature & humidity | Temperature correction is necessary | ||
| Store the tubes inthe refrigerator to keep at 10oC (50oF) orbelow. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Nitric oxide,Nitrogen dioxide | - | No effect | Nodiscoloration |
Chlorine,Bromine, | - | Plus error | Produce reddishpurple |
Acetone | 200 ppm | No effect | Nodiscoloration |
Unsaturatedhalogenated HCs | Plus error | Produce reddishpurple | |
Aromatichydrocarbons | 100 ppm | Minus error | Nodiscoloration |
| Othersubstance measurable with this detector tube |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25ppm | 100ppm | - |