Why a Fixed ETO Detector Is Essential
Ethylene oxide (ETO) is an IARC Group 1 carcinogen, with a permissible exposure limit of just 1 ppm (TWA). In spaces like hospital sterilization rooms where ETO is continuously present, leaks can occur without workers even noticing. Portable detectors only measure when a worker enters, but the fixed FIX800 provides 24-hour, 365-day continuous monitoring.
💡 Fixed vs. Portable Difference
The fixed FIX800 automatically detects and alarms even during nighttime and unmanned hours, immediately after a sterilization cycle completes, and when residual ETO is released. It is the only way to catch leaks that occur when no workers are present.
ETO Health Effects Table
| Concentration | Duration | Health Impact |
|---|---|---|
| 1 ppm | 8-hr TWA | OSHA PEL — long-term cancer risk (leukemia, lymphoma, stomach cancer) |
| 5 ppm | 15-min STEL | Headache, dizziness, mucous membrane irritation |
| 50 ppm | Tens of minutes | Respiratory irritation, nausea |
| 200 ppm | A few minutes | Pulmonary edema, risk of respiratory failure |
| 800+ ppm | Immediately | Loss of consciousness, death |
(Source: IARC Monographs Vol. 100F, 2012; OSHA 29 CFR 1910.1047)
Real ETO Accident Cases
🇺🇸 The Sterigenics ETO Contamination Case, USA (2019)
At a Sterigenics medical device sterilization plant in Georgia, ETO was released into the atmosphere for decades, and an investigation found that the cancer incidence rate among residents within a 1 km radius exceeded the national average by more than sixfold. The U.S. EPA subsequently tightened ETO emission standards significantly and made continuous monitoring mandatory. (Source: U.S. EPA, 2023 Risk Assessment)
🇰🇷 Exposure Cases at Korean Pharmaceutical and Medical Device Companies
In industrial accident statistics published by the Korea Ministry of Employment and Labor for 2022, blood cancer cases from long-term exposure were continuously reported among workers handling ETO in the medical device and pharmaceutical sectors. The absence of continuous fixed detectors, which failed to catch routine minor leaks, was identified as a contributing cause. (Source: Korea MoEL Industrial Accident Statistics, 2022)
WANDI FIX800: A Continuous ETO Monitoring Solution
Key Features of the FIX800 (for ETO Measurement)
- Simultaneous measurement of up to 5 gases: ETO, O₂, CO, H₂S, and EX (flammable gas) monitored together
- Electrochemical ETO sensor: High-sensitivity sensor detects from ultra-low concentrations (below 1 ppm)
- FIX-DS display board integration: Real-time concentration check from outside, such as at the entrance
- Audible and visual alarms: Immediate hazard notification via alarm sound and warning light
- Web monitoring: Remote real-time concentration checks from a PC or smartphone
If the FIX800 Had Been in Use: A Prevention Scenario
- 1After the sterilization cycle completes: FIX800 detects residual ETO concentration at or above 1 ppm
- 2Automatic alarm: An audible and visual alarm is triggered immediately, with the high concentration shown on the FIX-DS board
- 3Entry blocked: Workers check the reading on the display board and refrain from entering until the concentration reaches a safe level
- 4Re-check after ventilation: Once ventilation runs and the FIX800 shows below 1 ppm, safe entry is permitted
- 5History management: The entire concentration history is automatically saved to a web server, maintaining a legal record
A Closer Look at the WANDI FIX800 Product and Installation
Below are real photos of the WANDI FIX800 fixed multi-gas detector.


