Gastec Tubes and Sampling Pump
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Gas sampling pump kit and accessories
 
 
 
Ethylene oxide   NO.163
C2H4O
Performance  
Measuring Range (0.05 ) to 3%
Number of Pump Strokes 1
Correction Factor 1
Sampling Time 1 minute per pump stroke
Detecting Limit 0.02% (n = 1)
Colour Change Orange → Green
Reaction Principle C2H4O+ Cr6+ + H2SO4 → Cr3+
Coefficient of Variation 10% (for 0.05 to 1.0 %), 5% (for 1.0 to 3.0 %)
Shelf Life 3 Years
Corrections for temperature & humidity Unnecessary
Store the tubes at cool and dark place.
 
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Aromatic HCs   + Green
Alcohols, Esters, Ethers   + Green
 
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
1,4-Dioxane Factor: 2.0 1 0.1 to 6%
Propylene oxide Factor: 1.3 1 0.065 to 3.9%
Calibration gas generation Static gas dilution method
TLV-TWA TLV-STEL Explosive range
1 ppm - 3.6 to 100%
 
 
 
   
 

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