Part Number: 72-3300, or 72-3301 (Intermediate Kit)

testo 320

The new testo 320 is a high-quality measuring instrument for efficient flue gas analysis. Its wide measuring range makes it a reliable partner for eliminating malfunctions and emergencies, monitoring legal limit values or for daily routine work servicing heating systems.

List of Benefits

  • High resolution graphic display
  • Sensor monitoring
  • Fast sensor zeroing
  • User changeable sensors
  • Modular components


testo 320

The numerous measurement menus of the testo 320 are clearly structured. Standarized menu procedures, which are stored in the instrument specifically for your country, simplify operation – depending on which standards you are dealing with. The high-resolution display allows a detailed presentation of the measurement procedures and is easily legible even under the worst conditions.



High-resolution colour graphic display

  • The measurement menus and measurement values are presented in detail and always easily legible.

Sensor monitoring

  • Integrated traffic light system which continuously monitors the sensor       functionality.

Fast sensor zeroing

  • Automatic zeroing of gas sensor in only 30 seconds after start up, which can be cancelled if not required.

Sensors exchangeable by the user

  • Easy exchange of sensors by the user – no adjustment necessary.


  • Up to 500 measurement protocols can be saved and called up in the memory of the testo 320.

Lithium battery

  • Operation with a Lithium battery (1500mAh) – no battery change necessary, up to eight hours running time, charging via USB connection possible.


  • Integrated magnets for fast attachment to burner/boiler.

Stamp of approval

  • The flue gas analyzer testo 320 is TÜV-tested according to EN 50379, Parts 1-3.

Robust Design

  • Robust, durable instrument – ideally suited even to rough surroundings.

Condensate trap

  • Integrated condensate trap – very easily emptied.

Efficient exchange of probes

  • Fast and easy exchange of probes via the probe coupling. All gas paths are connected to the instrument at once with the bayonet connection.

Flexibility with modular probes

  • A range of probe lengths and diameters ensure a high degree of flexibility for all applications. To exchange the probe shaft, it is simply placed on the probe handle and engages.

Probe filter

  • Easy exchange of probe filter.



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