ULTRAMAT 23 is extremely  innovative and space saving - multi-component design with NDIR technology measures up to three IR active constituents and optional electrochemical cells for O2 and H2S measurement.

The integrated automatic calibration function using ambient air is a unique advantage, requiring a check with calibration gases only once a year. Menu-guided operation with plain text allows users and service personnel to operate the device immediately. The information in the logbook allows preventive maintenance.

The multi-layer detectors used guarantee high selectivity and reduced water vapour interference. The measuring cells used are robust and resistant and can easily be cleaned in case of faults pollution.  The sample cell is robust and can be easily cleaned.

The electrochemical oxygen sensor is used for determining the O2 reference value, and the hydrogen sulfide sensor means that the ULTRAMAT 23 can also be used for applications in biogas plants. Integration of the electrochemical cells together with NDIR technology in a single, compact device saves costs in sample preparation and spare parts management.


Max. number of components

3 IR + O2


e.g. CO, CO2, NO, SO2, CH4, O2, H2S

Smallest measuring range

Component-specific: 0-50 / 0-500 vpm


19“ rack unit


  • Highly cost effective because calibration gases are not required (AUTOCAL with ambient air, dependent on the measuring component)

  • High selectivity thanks to multi-layer detectors, e.g. low cross sensitivity to water vapor

  • Corrosion-resistant materials in gas path (option): Measurement possible in highly corrosive sample gases

  • Cleanable sample cells: Cost savings thanks to reuse after contamination

  • Menu-assisted operation in plain text

  • Open interface architecture (RS 485, RS 232; PROFIBUS, SIPROM GA): Simplified process integration; remote operation and control