Emissions and Combustion Analyzers for every industry.

Testo's analyzers provide the accuracy you expect, the easy-of-use you want, and the rugged construction needed for combustion tuning and emission testing.

Advanced features provide more benefits:

  • Proven state-of-the-art sensor technology: O2, CO, NOx (NO, NO2), SO2, CO2, H2S, HC
  • Outstanding design in: electronics, gas paths, calibration, and in-field service capability.
  • Extensive selection of sampling probes and hoses
  • Advanced software and data management packages
  • German engineered for over 60 years with unmatched field support makes these analyzers the most valued on the planet!

Portable analyzers for combustion analysis in commercial and industrial applications

Hand-held measuring intrument

  • testo 300 Next Level
    • testo 300 Next Level
  • The practical and efficient flue gas analyzer for versatile flue gas measurements
  • 3 sensors
  • O² (standard sensor)
  • Optional sensors:
    CO, CO H², NO, NOlow, Colow
  • CO² determination
    (calculation from O², standard)
  • Optional:
    Dilution up to 30.000 ppm

Hand-held for combustion tuning, troubleshooting, and emissions pre-testing

  • testo 340
    • testo 340
  • This compact 4-gas analyzer is perfect for combustion tuning or compliance pre-testing. Simple, rugged, and highly versatile.
  • 4 sensors
  • O2 (Standard sensor)
  • Optional Sensors:
    CO, COlow, NO, NOlow, NO2, SO2
  • CO2 determination
    (calculation from O2, standard)
  • Standard:
    Dilution of a sensor factor 5
    Dilution of all sensors factor 2

Multi-gas analyzer - EPA compliance testing, combustion monitoring and more

  • testo 350
    • testo 350
  • Highly flexible 6-Gas analyzer. Custom configured for EPA testing, or for industrial combustion monitoring, or even semi-continuous NOx monitoring.
  • 6 sensors
  • O2 (Standard sensor)
  • Optional sensors:
    CO, COlow, NO, NOlow, NO2, SO2, H2S, CxHy
  • CO2 measurment
    (Optional when fitted with CO2 infrared sensor)
  • Optional:
    Dilution of a sensor, selectable factor: 2, 5, 10, 20, 40
    Dilution of all sensors factor 5

Approved for Maritime (MARPOL Annex IV) testing and monitoring

  • testo 350 Maritime
    • testo 350 Maritime
  • Specifically designed for Diesel Marine engines. The only approved portable for MARPOL Annex VI and NOx Technical Code.
  • 6 sensors
  • O2
  • Standard:
    CO, NO, NO2, SO2
  • Standard:
    CO2 infrared sensor
  • Standard: Dilution of SO2 factor selectable: 2, 5, 10, 20, 40
  • Standard: Dilution of all sensors factor 5

How to contact us.

Do you have any questions?
We would be more than happy to help you.


Select your testing application below:

Combustion Analysis - Smarter and more brilliant than ever!

The New 3-Gas, Testo 300 combustion analyzer measures O2, CO and optional NO (calculated NOx), draft efficiency excess air, with proven sensor technology and now incorporates and transmits data via the new generation of connectivity.  Take it for a test drive so you can experience the:     

  • Brilliance you can touch
  • Bluetooth, WiFi and smart phone communications to Connect to your smart world
  • Long life sensor that last up to 6 years
Testo fine particle measuring instrument

Combustion gas & particle analyzer for biomass fueled applications

The Testo 380 integrates the measurement of the gaseous combustion parameters (ie. O2, CO and CO2) particulate mass (PM), in one simple-to-use package. The system provides all measurements in real-time and includes data logging capability through powerful software. Simultaneously measuring both fine particulate and the combustion parameters set a new standard in combustion instrumentation.

The testo 380 is solely designed to measure the combustion parameters and particulates from biomass fueled combustion sources.  The solid fuels include:

  • Wood pellets/logs/wood chips/wood briquettes (and wood refuse)
  • Straw and grains
  • Coal, coal briquettes, coke, brown coal, lignite and peat

Testo smoke count measuring instrument

Portable diesel smoke spot test meter

The testo 338 is a portable industrial particulate meter with Bluetooth that enables quick and simple measurement of smoke from diesel engines.  It takes just minutes to start the diesel smoke test meter and make a measurement.  The testo 338 measures soot concentration in mg/m3, Bosch Number, and Filter Smoke Number (FSN).