Gastec 134L 四氯化碳检测管CCl4（0.25~11ppm）
制造商: Gastec Model: 134L - 联系
Indicator: 0.25 to 5 ppm
Measuring Range:
+ 0.25 to 5 ppm, Number of Pump Strokes 2
+ 5 to 11 ppm, Number of Pump Strokes 1
Sampling Time: 2 minutes per pump stroke
Colour Change: White → Yellow
Reaction Principle:
+ CCl4 + I2O5 + H2S2O7 → COCl2,
+ COCl2 + (CH3)2NC6 H4CHO→ (CH3)2NC6 H4CHCl2 + CO2,
+ (CH3)2NC6H4CHCl2 + (C6H5)2NH(White) → Reaction product (Yellow)
Coefficient of Variation: 10% (for 0.25 to 1 ppm), 5% (for 1 to 5 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Details
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 2 minutes per pump stroke | ||
| Detecting Limit | 0.04 ppm (n=2) | ||
| Colour Change | White → Yellow | ||
| Reaction Principle |
CCl4 + I2O5 + H2S2O7 → COCl2 |
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| Coefficient of Variation | 10% (for 0.25 to 1 ppm), 5% (for 1 to 5 ppm) | ||
| Shelf Life | 1 Year | ||
| Corrections for temperature & humidity | Unnecessary | ||
| 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 |
| Hydrogen chloride | No | No | |
| Chlorine, Bromine |  3/10 |
+ | No( 0.4ppm) |
| Methyl bromide | 2.5times |
+ | Pale yellow (2.5ppm) |
| 1,1,1-Trichloroethane | 14 ppm |
+ | No(17ppm) |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Chloropicrin | 1.1 | 2 | 0.28 to 5.5 ppm |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5 ppm(2015) | 10 ppm(2015) | - |
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