| Performance |
| Measuring Range | 0.015 to 0.03% | 0.03 to 0.6% | 0.6 to 1.2% |
| Number of Pump Strokes | 2 | 1 | 1/2 |
| Correction Factor | 1/2 | 1 | 2 |
| Sampling Time | 1 minute per pump stroke | ||
| Detecting Limit | 0.003% （n = 2） | ||
| Color 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 color by itself |
| Acetylene | 3% | Yes | Produce dark brown to whole layer |
| Propane | 0.2% | Yes | Produce dark brown to whole layer |
| Aromatic HCs | 500 ppm | Plus error | Produce dark green |
| Alcohols, Esters, Ethers | - | Plus error | Produce dark green |
| Halogenated HCs. | 5000 ppm | Plus error | Produce dark green |
| Hydrogen sulfide | 500 ppm | Plus error | Produce dark green |
| Sulfur dioxide | 500 ppm | Plus error | Produce green |
| Other substance measurable with this detector tube |
| Substance | Correction | 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-S | Explosive range |
| 300ppm | 500ppm | 1.4 to 7.6% |
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