Smart ethylene oxide (C2H4O) detector EVIKON E2639 with a range of 0...100 ppm. Durable IP65-rated enclosure, 3 relays, RS485 Modbus communication, Wi-Fi module, built-in LED and audible alarm. More information
Out of stock - can be requested
| Detector type | Stationary |
| Equipment | Siren 85dB, LED |
| IP Rating | IP 65 |
| Output signal | ModBus RS485, 3x SPDT relay, 2x Analogue output 4-20mA |
| Power Supply | 14...36 VDC |
| Type of gas | C2H4O-Ethylene oxide |
| Weight | 0.50 kg |
E2639-EtO is a detector designed for monitoring high concentrations of ethylene oxide in the air. The device is equipped with a temperature-compensated sensor that ensures reliable detection and stable measurement, and is housed in a wall-mounted enclosure with IP65 protection. The E2639 features three SPDT relays with a maximum load of 250 VAC 5 A. Two relays are used for so-called two-stage detection. The third relay indicates a sensor fault. Communication with higher-level systems is provided by an RS485 Modbus RTU digital interface, supplemented by two 4–20 mA analogue outputs. The version with a Wi-Fi module allows wireless connection of a smartphone or tablet for configuration and calibration via a web interface, with no app installation required. In addition, the device includes four LEDs and an audible alarm that immediately alerts operators to any exceedance of the set limit directly at the installation site, without the need to monitor a remote control system.
The E2639-EtO detector is intended for monitoring ethylene oxide in environments such as sterilisation facilities, hospitals, pharmaceutical plants, chemical stores, and other enclosed spaces where C₂H₄O may accumulate. The device helps prevent health risks associated with exposure to this gas and contributes to the safety of both personnel and operations.


Ethylene oxide is a colourless gas with a sweet ether-like odour, which is highly flammable and explosive at room temperature. It is produced primarily by the industrial synthesis of ethylene with oxygen and is used as an intermediate in the manufacture of ethylene glycol, plastics, and detergents, as well as a sterilising agent in healthcare. Even short-term exposure to ethylene oxide can cause eye and respiratory tract irritation, headaches, or nausea, while long-term exposure is associated with an increased risk of cancer and damage to the nervous system.
The E2639 detector combines the advantages of an autonomous safety element and an intelligent communication node. It is designed for seamless integration with fire alarm systems (EPS) and offers a wide range of outputs for comprehensive control:


Compared to the standard version, the E2639-WF has an integrated WiFi module that turns calibration and configuration into a matter of minutes – with no tools and no need to remove the cover. The access point is activated using a magnetic key, and the configuration interface opens in the browser of a phone or tablet, with no need to download any app. The interface is password-protected with separate access levels for end users and integrators, so everyone works only within their own section of the settings.
Factory settings:
Each detector package includes the manufacturer's original calibration certificate in English, confirming the accuracy and correctness of measurement at the time of leaving the factory.
We respond to your product queries as quickly as possible, usually within 24 hours.
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