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Smart nitrogen dioxide (NO2) detector EVIKON E2639 with a range of 0...200 ppm. Durable IP65-rated enclosure, 3 relays, RS485 Modbus communication, and built-in LED/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 | NO2 - Nitrogen Dioxide |
| Weight | 0.50 kg |
E2639-NO2 is a detector designed for monitoring high concentrations of nitrogen dioxide 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 by the RS485 Modbus RTU digital interface, complemented by two 4–20 mA analogue outputs. In addition, the device includes four LEDs and an audible alarm, which immediately alert operators to any exceedance of the set limit directly at the installation site – without the need to monitor a remote control system.
The E2639-NO2 detector is intended for monitoring nitrogen dioxide in environments such as industrial facilities, chemical and analytical laboratories, exhaust and combustion stations, welding workplaces, printing works, and other enclosed spaces where NO2 may accumulate. The device helps prevent health risks associated with exposure to this highly toxic gas and contributes to ensuring the safety of both personnel and operations.
Nitrogen dioxide is a reddish-brown toxic gas with a characteristic pungent odour. Its presence in the air can be recognised by smell at higher concentrations, but reliable detection without a measuring instrument is not possible. In enclosed spaces, it can accumulate to dangerous concentrations, and due to its high reactivity, it aggressively attacks the respiratory tract even at relatively low levels. Exposure to higher concentrations of nitrogen dioxide may cause irritation of the mucous membranes, coughing, shortness of breath, or headaches, and prolonged exposure may result in serious lung damage, chemical pneumonitis, and adverse effects on the cardiovascular 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:
The E2639 is equipped with three M20 cable glands and a dual terminal block for Modbus RTU. The duplicated Modbus RTU terminals help simplify and speed up bus wiring for data readout to the higher-level system. No more inserting two conductors into a single terminal. Thanks to the M20 cable glands, all required outputs can be connected conveniently.
Factory settings:
Each detector package includes the original manufacturer's 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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