Gastec 133M Quick-measuring Detector tubes Tetrachloroethylene Cl2C：CCl2 (2~250ppm)
ManufacturerGastec(View more products from this manufacturer)
Model133M
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Indicator: 5 to 100 ppm
Measuring Range:
+ 2 to 5 ppm, Number of Pump Strokes 2
+ 5 to 100 ppm, Number of Pump Strokes 1
+ 100 to 250 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Yellow → Reddish purple
Reaction Principle: Cl2C:CCl2 + PbO2 + H2SO4 → HCl, HCl + Base → Chloride
Coefficient of Variation: 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 45 seconds per pump stroke | |||
| Detecting Limit | 0.4 ppm (n=2) | |||
| Colour Change | Yellow → Reddish purple | |||
| Reaction Principle | Cl2C:CCl2 + PbO2 + H2SO4 → HCl HCl + Base → Chloride |
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| Coefficient of Variation | 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm) | |||
| Shelf Life | 2 Years | |||
| Corrections for temperature & humidity | Temperature correction is necessary | |||
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. | ||||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Nitric oxide, Nitrogen dioxide | No | No | |
| Chlorine, Bromine, Hydrogen chloride |
+ | Reddish purple | |
| Acetone | ≦ 200 ppm | No | No |
| Unsaturated halogenated HCs | + | Reddish purple | |
| Aromatic hydrocarbons | ≧ 100 ppm |  |
No |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | 100 ppm | - |
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