The ethylene oxide monitor is an easy method to sample for either 15 minute STEL or full shift 8 hour exposures.  Ethylene oxide  is collected on a flexible, inert charcoal wafer treated with hydrogen bromide.  The hydrogen bromide converts ethylene oxide to 2-bromoethanol.  At the lab, the excess hydrogen bromide is neutralized with sodium carbonate.  Then, the 2-bromoethanol is extracted with 90/10 toluene/acetonitrile and analyzed by GC/ECD.  No further derivatization is required.

Tech Doc


Before sampling, store and ship at room temperature.

After sampling, store and ship at room temperature.  Return to the lab within 14 days of sampling.

Use For

The 555 ethylene oxide badge may be used for:

  • 15 minute, STEL sampling
  • 8 hour, TWA sampling
  • 24 hour, IAQ sampling

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Item # Description Quantity Online Price
With Analysis (best deal)
X555AT Ethylene Oxide monitors (set of 5) with analysis prepaid for each
W555AT Ethylene Oxide monitor (single) with analysis prepaid
Analysis sold separately
N555AT Ethylene Oxide monitors (set of 10) without analysis