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Gastec 172 Quick-measuring Detector tubes Ethylen C2H4 (25~1680 ppm)

  • Manufacturer: Gastec
    Model: 172
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Manufacture: Gastec
Model: 172
Origin: Japan

Indicator: 50 to 800 ppm
Measuring Range:
+ 25 to 800 ppm, Number of Pump Strokes 1
+ 800 to 1680 ppm, Number of Pump Strokes 1/2
Sampling Time: 3 minute per pump stroke
Colour Change: Pale yellow → Blue
Reaction Principle: CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue
Coefficient of Variation: 10% (for 25 to 200 ppm), 5% (for 200 to 800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
(25) to 800 ppm 800 to 1680 ppm
Number of Pump Strokes
1 1/2
Correction Factor
1 2.1
Sampling Time
3 minutes 1.5 minutes
Detecting Limit 5 ppm (n=1)
Colour Change Pale yellow → Blue
Reaction Principle CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue
Coefficient of Variation 10% (for 25 to 200 ppm), 5% (for 200 to 800 ppm)
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
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 + Blue
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Acetylene 1.3 1 32.5 to 1040 ppm
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
200ppm(2014) - 2.7 to 36%

 

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