Ethylene oxide |
NO.163LL |
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Measuring Range |
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Number of Pump Strokes |
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Correction Factor |
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Sampling Time | 1.5 minutes per pump stroke | ||
Detecting Limit | 0.05 ppm (n=4) | ||
Colour Change | Yellow → Pale orange | ||
Reaction Principle | C2H4O → 2HCHO 3HCHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate |
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Coefficient of Variation | 15% (for 0.1 to 0.5 ppm), 10% (for 1 to 5 ppm) | ||
Shelf Life | 1 Year | ||
Corrections for temperature & humidity | Temperature correction is necessary | ||
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Substance | Concentration | Interference | Change colour by itself to |
Acetaldehyde | 1.5ppm | + | Pale orange |
Formaldehyde | 0.5ppm | + | Pale orange |
Ketones | 15ppm | + | Pale orange |
Alcohols | 300ppm | ![]() |
No |
Calibration gas generation | Permeation tube method |
TLV-TWA | TLV-STEL | Explosive range |
1 ppm | - | 3.6 to 100% |