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Determination of ammonia in gases

The OnlineNH3 is used for a quantitative determination of the released NH3 in buildings for livestock, digestion towers and biogas plants.

The OnlineNH3 enables an increase of efficiency of treatment methods through the quantitative measurement of the NH3-value in front and after filter plants respectively through measuring the individual process steps of a biogas plant.

Maintenance and cleaning cycles can be accurately identified and optimized.


  • As basis for NH3 adjusted regulations (e. g. monitoring of air quality in livestock buildings)
  • Environment analysis

Fields of applications:

  • Industrial sectors
  • Animal husbandry
  • Biogas plants


  • Continuous NH3 determination in gases (measurement duration < 5 min)
  • Robust method of analysis
  • Automatic sample dosing
  • Easy calibration steps
  • Selective electrochemical sensor with no cross-sensitivity
  • Software easy-to-use
  • Output value of NH3 as a 4 - 20 mA signal for integration into the local control system
  • Long lifetime of the sensors due to the intermittent gas switching
  • Integrated rinsing steps for measuring of continually fresh samples
  • Active sample intake of the gas up to a distance of 100 m – variable setup of device (wall mounted)
  • Also available for determination of hydrogen sulphide (H2S), sulphur dioxide (SO2) or ozone (O3)


Informations about the OnlineNH3


ECH Elektrochemie Halle GmbH
Otto-Eißfeldt-Straße 8
06120 Halle (Saale)

Tel.: +49 345 279570-0
Fax: +49 345 279570-99
Mail: info@ech.de

Sales and Service Center UK

ECH Scientific Limited
Building 69, Wrest Park, Silsoe
Bedfordshire, MK45 4HS
United Kingdom

Tel.: +44 1525 404747
Fax: +44 1525 404848
Mail: info@echscientific.com

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