Gastec 101 Quick-measuring Detector tubes Gasoline CnHm (0.015~ 1.2%)
ManufacturerGastec(View more products from this manufacturer)
Model101
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Indicator: 0.03 to 0.6%
Measuring Range:
+ 0.015 to 0.03％, Number of Pump Strokes 2
+ 0.03 to 0.6%, Number of Pump Strokes 1
+ 0.6 to 1.2%, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: Orange → Dark green
Reaction Principle: CnHm + Cr^(6+)+ H2SO4 → Cr^(3+)
Coefficient of Variation: 10% (for 0.03 to 0.1 %), 5% (for 0.1 to 0.6 %)
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 | 1 minute per pump stroke | |||
| Detecting Limit | 0.003% (n = 2) | |||
| Colour Change | Orange → Dark green | |||
| Reaction Principle | CnHm + Cr6++ H2SO4 → Cr3+ | |||
| Coefficient of Variation | 10% (for 0.03 to 0.1 %), 5% (for 0.1 to 0.6 %) | |||
| 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 | 3% | + | Dark brown (whole layer) |
| Propane | 0.2% | + | Dark brown (whole layer) |
| Aromatic HCs | 500 ppm | + | Dark green |
| Alcohols, Esters, Ethers | + | Dark green | |
| Halogenated HCs. | 5000 ppm | + | Dark green |
| Hydrogen sulphide | 500 ppm | + | Dark green |
| sulphur dioxide | 500 ppm | + | Green |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Heptane | Factor: 1.0 | 1/2, 1 or 2 | 0.015 to 1.2% |
| Isooctane | Factor: 0.9 | 1 | 0.027 to 0.54% |
| Octane | Factor: 1.2 | 1 | 0.036 to 0.72% |
| Calibration gas generation | Static gas dilution method |
| TLV-TWA | TLV-STEL | Explosive range |
| 300 ppm | 500 ppm | 1.4 to 7.6% |
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