Gastec 172L快速乙烯检测管 C2H4(0.2~100ppm)

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

Detail

Catalog

Manual

Performance
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.
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 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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