Smart ozone (O3) detector EVIKON E2639 with a range of 0...5 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 | 230 VAC |
| Type of gas | O3 - Ozone |
| Weight | 0.50 kg |
E2639-O3 is a detector designed for monitoring high concentrations of ozone in the air. The device is equipped with a temperature-compensated sensor that ensures reliable detection and stable measurement, and it 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 via the RS485 Modbus RTU digital interface, supplemented by two 4–20 mA analogue outputs. The version with a Wi-Fi module enables wireless connection of a smartphone or tablet for configuration and calibration via a web interface, with no need to install an app. In addition, the device includes four LEDs and an audible alarm, which immediately alert operators to an exceeded set limit directly at the installation site, without the need to monitor a remote control system.
The E2639-O3 detector is intended for monitoring ozone in environments such as printing and photocopying centres, disinfection and sterilisation equipment, laser facilities, storage areas with ozone generators, and other enclosed spaces where O3 may accumulate. The device helps prevent health risks associated with exposure to this gas and contributes to ensuring the safety of both personnel and operations.


Ozone is a colourless gas with a characteristic sharp odour reminiscent of chlorine, which can be easily detected at higher concentrations. It is produced by electrical discharges, the action of UV radiation, or as a by-product of laser printers, welding, and disinfection equipment. Even low concentrations of ozone can cause health problems such as eye irritation, coughing, headaches, or damage to the respiratory tract, while higher levels may lead to serious lung damage.
The E2639 detector combines the advantages of an autonomous safety device 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 – without tools and without removing 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 each user works only within their own part of the settings.
Factory settings:
Each detector package includes the manufacturer’s original calibration certificate in English, confirming measurement accuracy and correctness 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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