Gastec 174L Quick-measuring Detector tubes 1,3-Butadiene CH2:CHCH:CH2 (2.5~100ppm)
ManufacturerGastec(View more products from this manufacturer)
Model174L
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Indicator: 10 to 100 ppm
Measuring Range:
+ 2.5 to 5 ppm, Number of Pump Strokes 8
+ 5 to 100 ppm, Number of Pump Strokes 4
Sampling Time: 3 minute per pump stroke
Colour Change: Pale yellow → White
Reaction Principle: CH2:CHCH:CH2 + (NH4)2MoO4 + PdSO4 → White product
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 | 3 minutes per pump stroke | ||
| Detecting Limit | 0.5 ppm (n=8) | ||
| Colour Change | Pale yellow → White | ||
| Reaction Principle | CH2:CHCH:CH2 + (NH4)2MoO4 + PdSO4 → White product | ||
| Coefficient of Variation | 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity | Unnecessary | ||
| Store the tubes at cool and dark place. | |||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Acetylene, Hydrogen cyanide | + | White | |
| Carbon monoxide, Hydrogen | + | Blue (whole layer) | |
| Hydrogen chloride | + | Pink | |
| Hydrogen sulphide | + | Black | |
| Ethylene, Propylene, Butylene | + | Blue | |
| Butane, Pentane | + | Blue (whole layer) |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| 1,3-Pentadiene | 8.5 | 4 | 42.5 to 850 ppm |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 2 ppm(2014) | - | 2.0 to 12% |
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