Gastec 172L Quick-measuring Detector tubes Ethylen C2H4 (0.2~100ppm)
Manufacturer: Gastec Model: 172L - Request a Quotation
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Indicator: 0.2 to 50 ppm
Measuring Range:
+ 0.2 to 50 ppm, Number of Pump Strokes 4
+ 50 to 100 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Pale yellow → Blue
Reaction Principle: CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue
Coefficient of Variation: 10% (for 0.2 to 10 ppm), 5% (for 10 to 50 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Measuring Range | 0.2 to 50 ppm | 50 to 100 ppm |
Number of Pump Strokes | 4 | 2 |
Correction Factor | 1 | 2 |
Sampling Time | 2 minutes per pump stroke | |
Detecting Limit | 0.05 ppm (n=4) | |
Colour Change | Pale yellow → Blue | |
Reaction Principle | CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue | |
Coefficient of Variation | 10% (for 0.2 to 10 ppm), 5% (for 10 to 50 ppm) | |
Shelf Life | 3 Years | |
Corrections for temperature & humidity | Temperature correction is necessary | |
Store the tubes at cool and dark place. |
Substance | Concentration | Interference | Change colour by itself to |
Ammonia, Hydrogen cyanide | + | White | |
Carbon monoxide, Hydrogen | + | Blue (whole layer) | |
Hydrogen chloride | + | Pink | |
Hydrogen sulphide | + | Black | |
Butadiene | + | White | |
Butane, Pentane | + | Blue (whole layer) | |
Butylene, Propylene | 1/4 time | + | Blue |
Calibration gas generation | High pressure gas cylinder method |
TLV-TWA | TLV-STEL | Explosive range |
200ppm(2014) | - | 2.7 to 36% |
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