Gastec 161 Quick-measuring Detector tubes Ethylether (C2H5)2O (0.04 ~ 1.0%)
ManufacturerGastec(View more products from this manufacturer)
Model161
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Indicator: 0.04 ~ 1.0%
Measuring Range: 0.04 ~ 1.0%, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellowish brown → Dark green
Reaction Principle: (C2H5)2O+ Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 10% (for 0.04 to 0.2 %), 5% (for 0.2 to 1.0 %)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range | 0.04 to 1.0% |
| Number of Pump Strokes | 1 |
| Correction Factor | 1 |
| Sampling Time | 1.5 minutes per pump stroke |
| Detecting Limit | 0.001% (n=1) |
| Colour Change | Yellowish brown → Dark green |
| Reaction Principle | (C2H5)2O+ Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation | 10% (for 0.04 to 0.2 %), 5% (for 0.2 to 1.0 %) |
| 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 |
| Propane |  0.2% |
+ | Dark green (whole layer)(0.2%) |
| Alcohols, Esters, Ketones | + | Dark green | |
| Aromatic HCs. | 500 ppm |
+ | Dark green(500 ppm) |
| Hydrogen sulphide | 500 ppm |
+ | Green(500 ppm) |
| sulphur dioxide | 500 ppm |
+ | Green(500 ppm) |
| Acetylene | 0.3% |
+ | Dark green (whole layer)(0.3%) |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Isopropyl ether | 0.45 | 2 | 0.018 to 0.45% |
| Methyl ether | 0.85 | 1 | 0.034 to 0.85% |
| Tetrahydrofuran | 1.4 | 1 | 0.056 to 1.4% |
| Toluene | by scale | 1 | 0.02 to 0.8% |
| Calibration gas generation | Static gas dilution method |
| TLV-TWA | TLV-STEL | Explosive range |
| 400 ppm (2014) | 500 ppm (2014) | 1.9 to 36% |
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