Flameproof Ammonia Detector-Transmitter

  • Suitable for ATEX Zones 2 and 22
  • Long-life electrochemical gas sensor
  • Ranges 0...100, 0...300, 0...1000 ppm NH3
  • 2 × 4-20 mA / 0-10 V, RS485
  • Two SPST relays (option)


E2658 series is a new line of flameproof detectors and transmitters intended for use in ATEX Zones 2 and 22. 

E2658 series devices are based on PluraSens® multifunctional platform.

Ammonia detector-transmitter E2658-NH3-E utilises novel fully calibrated and temperature compensated electrochemical gas sensor with excellent repeatability, stability and long lifetime. 

NOTE The device is intended for eventual leakage control. Do not use the device in areas with constantly high level of ammonia. 

To connect the device to safety or building automation systems use two analog outputs and RS485 digital interface with industry standard Modbus RTU protocol.

Two relays with closing contact (option) may be used for remote signalling or ventilation control. For 0...100 ppm range alarm set-points are 25 and 35 ppm. For other ranges alarm set-points are user settable.