Gastec 101L Quick-measuring Detector tubes Gasoline CnHm (30~2000 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model101L
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Indicator: 30 to 1000 ppm
Measuring Range:
+ 30 to 1000 ppm, Number of Pump Strokes 2
+ 1000 to 2000 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: Brownish yellow → Dark green
Reaction Principle: CnHm + Cr6++ H2SO4 → Cr3+
Coefficient of Variation: 10% (for 30 to 300 ppm), 5% (for 300 to 1000 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 | 5 ppm (n=2) | ||
| Colour Change | Brownish yellow → Dark green | ||
| Reaction Principle | CnHm + Cr6++ H2SO4 → Cr3+ | ||
| Coefficient of Variation | 10% (for 30 to 300 ppm), 5% (for 300 to 1000 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 |
| Hydrogen sulphide | + | Dark brown | |
| Acetylene | + | Dark brown | |
| Aromatic HCs | + | Dark green | |
| Esters, Ethers,Alcohols | + | Dark green | |
| sulphur dioxide | + | Dark green | |
Organic solvents ( C3) |
+ | Dark green |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Allyl chloride | Factor: 34 | 1/2 | 0.1 to 3.4% |
| Heptane | Factor: 1.0 | 1 or 2 | 30 to 2000 ppm |
| Isobutene | Factor: 22 | 1 | 0.07 to 2.2% |
| 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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