The testo 300 flue gas analyzer

Smart Touch operation

Intuitive measurement menus
testo 300


Ready to use straight away

Truly robust

Protected display

Secure mounting

Bolted housing

Robust sensors
Extremely durable O2 sensor, automatic dilution up to 30,000 ppm CO.
Paper-free documentation
Truly flexible

Flexible instrument configuration
Choice of 2-year or 4-year warranty for the sensors. Additional slot for NOx sensor (besides O2 & CO sensor).

Versatile probes – quickly changed

Tried-and-tested probes

New probes

The interface to the future – Testo connectivity
Transfer measurement data quickly and easily to common sector Apps and software applications wirelessly by WLAN and Bluetooth. More information.

"My very first test of the new flue gas analyzer testo 300 showed me that with the newly introduced technology, it’s made a giant quantum leap."
Marcello Cigoli, Italy

"The built-in address book of the testo 300 is among our favourite features. Now every customer is listed with which measurements were done, with which results."
Erwin van de Pol, Netherlands

"I especially like the user-friendliness of the testo 300. If you can handle a smartphone, this measuring instrument is right for you."
Sebastiaan Moonen, Netherlands

"The testo 300 makes the same robust impression on me as the testo 330-2 LL already did. But with the new display, there’s a lot which is more user-friendly and easier to operate."
Maximilian Kretschmar, Germany
The bestseller kits
testo 300 kit 1
- testo 300 flue gas analyzer with O2 and CO sensor
- CO measurement up to 4,000 ppm
- For gas and oil systems
testo 300 kit 2
- testo 300 flue gas analyzer with O2 and CO sensor
- CO measurement up to 8,000 ppm
- For gas and oil systems
- For solid fuels purchasing modular probe in addition is recommended















