Evikon E2658-NH3-P Flameproof Ammonia Detector Transmitter


  • Wall mount robust flameproof metal enclosure
  • Suitable for ATEX Zones 2 and 22
  • Two analog outputs settable to 4-20 mA or 0-10 V
  • RS485 Modbus RTU digital interface
  • Relay option

Dpstar is an authorized distributor of Evikon. Evikon is an instrumentation company, specializing in the development, manufacturing, and marketing of sensor-based electronic measurement instruments for industrial and building automation applications. Our mission is to provide businesses and organizations with convenient and efficient technical solutions for the measurement of environmental parameters and control of processes – temperature, pressure, level, humidity, and moisture, toxic and explosive gases – to help save resources, increase production quality and ensure safety.

E2658 series is a new line of flameproof detectors and transmitters intended for use in ATEX Zones 2 and 22. The instruments are based on the PluraSens® multifunctional platform. One of the most common applications is detection of explosive Ammonia concentrations in refrigeration machinery rooms. Ammonia detector-transmitter E2658-NH3-P utilizes a fully calibrated and temperature-compensated pellistor (catalytic) gas sensor with excellent repeatability, stability and long lifetime. Two relays with closing contact (optional) may be used for remote signaling or concentration control. Two alarm set-points are user settable. Two analog outputs and RS485 digital interface with industry-standard Modbus RTU protocol can connect the detector to safety or building automation systems.



Сalibration Ammonia NH3
Sensor type Pellistor (catalytic bead)
Sampling method Diffusion
Detection range 0…15% vol. (0…100% LEL)
Resolution 0.1% vol. or 1% LEL
Response time T90 ≤10 s
Accuracy ± 2% LEL
Sensor lifetime > 3 years
Power supply 12…36 VDC (default),
24 VAC or 230 VAC as options
Digital interface RS485, Modbus RTU protocol
Analog outputs 2 × 4-20 mA / 0-10 V, user settable
Output relays (option) 2 × SPST relays (closing contact),
250 VAC / 30 VDC, 5 A max
Enclosure Die-cast aluminum, wall mount, IP66
Dimensions H80 × W125 × D57 mm
Operating conditions -20…+60 °C, 0…95 %RH
Safe areas and ATEX Zones 2 and 22


Evikon E2658-NH3-P Flameproof Ammonia Detector Transmitter_DpstarGroup