impact instruments
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Flue Gas Analysers with Single NDIR Sensors

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GA-21plus portable gas analyzer

Main features

  • Produced in two kinds of casing: soft and hard
  • Equipped with up to 7 electrochemical cells
  • Equipped with up to 2 NDIR sensors
  • Built-in 58mm ribbon graphic printer
  • Built-in rechargeable battery for up to 7 hours of operating
  • Peltier “miniDryer” with a peristaltic pump for condensate removal (optional)
  • Probe holder with a standard M30x1 fitting, fits all madur gas probes with the K-type thermocouples
  • Gas filter with condensate trap and replaceable insert
  • Differential pressure sensor - for measurements of chimney draft and flow velocity (with help of Pitot tube)
  • Soot measurement program
  • Measurements of gas and ambient temperatures
  • 2 additional inputs for extra temperature sensors
  • Analogue outputs (0/4-20mA or 0-10V) - optional
  • Built-in large memory for results, two formats of data savings
  • Calculations of many additional parameters
  • Firmware for gas calibrations


Two versions of analyser are available: 

  1. Version in “soft” casing
  2. Version in “hard” casing

Soft vs hard casing


Complete and ready to operate GA-21plus analyser (hard case version)


Front panel view


Gas and electric connectors (full option)


Example screenshots


Example printouts and screenshot from PC program


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