Gastec 139 Quick-measuring Detector tubes 1,2-Dichloroethylene ClCH：CHCl (5~250ppm)
ManufacturerGastec(View more products from this manufacturer)
Model139
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Indicator: 10 to 100 ppm
Measuring Range:
+ 5 to 10 ppm, Number of Pump Strokes 2
+ 10 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: ClCH:CHCl + PbO2 + H2SO4 → HCl, HCl + Base → Chloride
Coefficient of Variation: 10% (10 ~ 20 ppm), 5% (20 ~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 | 1 ppm (n=2) | |||
| Colour Change | Yellow → Reddish Purple | |||
| Reaction Principle |
ClCH:CHCl + PbO2 + H2SO4 → HCl |
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| Coefficient of Variation | 10% (for 10 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 |
| Nitrogen oxides | No | No | |
| Hydrogen chloride, Halogens | + | Reddish purple | |
| Tetrachloroethylene | + | Reddish purple | |
| Trichloroethylene | + | Reddish purple |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 200 ppm | - | - |
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