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Testo 350

The testo 350 is a rugged, easy-to-use exhaust gas analyzer designed to meet the highest demands when it comes to carrying out precise industrial emission measurements

Portable Emission Analyzer for industrial measurement

Flue gas analyzer for industry testo 350 – Professional measurement system for portable, industrial emission measurement.

  • Application-guided operation with useful instrument presetting
  • Large colour graphical display
  • Industrial-standard design:
    • Insensitive to impact and dirt thanks to integrated impact protection
    • Robust plug-in connections
    • Closed chambers protect the interior of the instrument from dirt
  • Easy exchange of gas sensors and quick access to wearing parts



A flue gas analyzer from Testo offers you

  • Reliable brand quality with over 60 years’ experience
  • Service and maintenance
  • Extensive range of probes which often replace additional measuring instruments.


The portable flue gas analyzer testo 350 is the ideal tool for professional flue gas analysis. The Control Unit is the removable operation and display unit of the testo 350. The presentation of the measurement values takes place via the colour graphic display. Thanks to the internal memory, measurement data can be transferred from the analyzer box to the Control Unit. If required, several analyzer boxes can be operated and controlled with one Control Unit. The measurement technology is situated in the analyzer box. The robust housing has integrated impact protection. Downtimes due to contamination of the instrument are almost completely eliminated. Inherently closed chambers protect the interior of the instrument from dirt from the surroundings. Operation can also be carried out in direct connection to a PC or notebook or via Android smartphone or tablet with the free App, as an alternative to the Control Unit. After programming, the analyzer box is able to carry out measurements and store measurement data independently



Testo 350 can Measure O2, CO, CO2, NO, NO2, SO2, H2S and HC gases (max. 06 sensors at a time) and also display Excess Air, Gross Efficiency, Net Efficiency, Temperatures of Flue Gas & Ambient Air etc.


Also Differential pressure, Flue Gas Velocity etc. etc. can be measured if the corresponding optional accessories are installed. The results are printed on the IR printer in addition to display on screen.


Flue gas measuring instruments have been among Testo’s bestsellers for decades.



  • Increased Efficiency
  • Environmental Benefits
  • Safety
  • Obtains Data Quickly


Industries & Applications:

  • Cogeneration Plant
  • Boiler Plant
  • Gas Turbines
  • Aluminum Works
  • Metal and Steel Works
  • Cement Works
  • Mining
  • Glass melting furnace
  • Ship’s engines
  • Automobile