Gastec 112L Quick-measuring Detector tubes Ethanol C2H5OH (50-2000ppm)
ManufacturerGastec(View more products from this manufacturer)
Model112L
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Indicator: 100 to 2000 ppm
Measuring Range:
+ 50 to 100 ppm, Number of Pump Strokes 2
+ 100 to 2000 ppm, Number of Pump Strokes 1
Sampling Time: 2 minutes per pump stroke
Colour Change: Pink → Pale blue
Reaction Principle: C2H5OH + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 10% (for 100 to 500 ppm), 5% (for 500 to 2000 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 | 2 minutes per pump stroke | ||
| Detecting Limit | 15 ppm (n=2) | ||
| Colour Change | Pink → Pale blue | ||
| Reaction Principle | C2H5OH + Cr6+ + H2SO4 → Cr3+ | ||
| Coefficient of Variation | 10% (for 100 to 500 ppm), 5% (for 500 to 2000 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity | Temperature correction is necessary | ||
| Store the tubes at cool and dark place. | |||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Alcohols | + | Pale blue | |
| Acetone |  1000 ppm |
No | No discolouration up to 1000 ppm |
| Ethyl Acetate | 500ppm |
No | No discolouration up to 500 ppm |
| Toluene | 300ppm |
No | No discolouration up to 300 ppm |
| Benzene | 70ppm |
No | No discolouration |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | 1000ppm (2014) | 3.3 to 19% |
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