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简单介绍：
四氯乙烯检测管133HA Tetrachloroethylene，Measuring Range 7 to 20 ppm 20 to 300ppm 300 to 900ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1/3 1 3 Sampling Time 45 seconds per
详情介绍：
四氯乙烯检测管133HA Tetrachloroethylene No.133HA
Cl2C:CCl2
| Performance |
Measuring Range | 7to 20ppm | 20to 300ppm | 300to 900ppm |
Number of PumpStrokes | 2 | 1 | 1/2 |
Correction Factor | 1/3 | 1 | 3 |
Sampling Time | 45 seconds per pumpstroke | ||
Detecting Limit | 0.5 ppm (n=2) | ||
Color Change | Yellow → Reddishpurple | ||
Reaction Principle | Cl2C:CCl2 + PbO2 + H2SO4 → HCl | ||
| Coefficient ofVariation | 10% (for 20 to 100ppm), 5% (for 100 to 300 ppm) | ||
| ShelfLife | 2Years | ||
| Correctionsfor temperature & humidity | Temperature correction is necessary | ||
| Store the tubes in the refrigerator to keep at10oC (50oF) orbelow. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Chlorine,Bromine, | - | Plus error | Produce reddishpurple |
1,1,1-Trichloroethane | 3000 ppm | Plus error | Produce reddishpurple stain |
Trichloroethylene | - | Plus error | Produce reddishpurple |
| Unsaturated Halogenated HCs | - | Plus error | Produce reddishpurple |
| Othersubstance measurable with this detector tube |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25ppm | 100ppm | - |