Gastec 152 Quick-measuring Detector tubes Methyl ethyl ketone CH3COC2H5 (0.02 ~ 0.6%)
ManufacturerGastec(View more products from this manufacturer)
Model152
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Indicator: 0.02 ~ 0.6%
Measuring Range: 0.02 ~ 0.6%, Number of Pump Strokes 2
Sampling Time: 1.5 minute per pump stroke
Colour Change: Orange → Dark green
Reaction Principle: CH3COC2H5 + Cr6+ + H2SO4 + → Cr3+
Coefficient of Variation: 10% (for 0.02 to 0.2 %), 5% (for 0.2 to 0.6 %)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range | 0.02 to 0.6% |
| Number of Pump Strokes | 2 |
| Correction Factor | 1 |
| Sampling Time | 1.5 minutes per pump stroke |
| Detecting Limit | 0.002% (n=2) |
| Colour Change | Orange → Dark green |
| Reaction Principle | CH3COC2H5 + Cr6+ + H2SO4 + → Cr3+ |
| Coefficient of Variation | 10% (for 0.02 to 0.2 %), 5% (for 0.2 to 0.6 %) |
| 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 |
| sulphur dioxide |  500 ppm |
+ | Green(500 ppm) |
| Hydrogen sulphide | 500 ppm |
+ | Dark green(500 ppm) |
| Alcohols, Esters, Ketones | + | Dark green | |
| Propane | 0.2% |
Yes | Dark green (whole layer)(0.2%) |
| Aromatic HCs. | 500 ppm |
+ | Dark green(500 ppm) |
| Calibration gas generation | Static gas dilution method |
| TLV-TWA | TLV-STEL | Explosive range |
| 200 ppm (2014) | 300 ppm (2014) | 1.7 to 11.4% |
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