• Commercial combustion analyzer
• 0 - 4000 ppm CO
• Long life sensors - 4 year sensor warranty
• Has slot for third sensor - NO sensor can be retrofitted
• Does not include printer or NO sensor
• Fast and easy to operate: intuitive measurement menus and fast-response Smart-Touch display
• Large 5-inch Smart-Touch HD display - see all the system's measurements at a glance
• Ready to measure at the touch of a button from standby mode

The Testo 300 LL COMM (catalog number 0564 3004 92) is a commercial combustion analyzer with O2 and CO sensors. CO measurement is up to 4,000 ppm. This model features long life sensors and a sensor warranty of four years. This version of the Testo 300 contains a slot for a third sensor. It does not include a printer or NO sensor. In the smart world of today, a combustion analyzer needs to do much more than provide reliably accurate results. Key to technician efficiency is an instrument that performs before and after taking a measurement to ensure speed and accuracy through an intuitive interface designed to make work easier. The user-friendly and highly efficient testo 300 was developed with this objective in mind. It is not just decades of experience in measuring technology. With smart-touch operation, robust construction and e-mailing of reports, the testo 300 will quickly become your indispensable companion for all measuring tasks involving heating. Operation via smart-touch The smart-touch display responds immediately without any delay. That allows intuitive operation - just as easy as on your smartphone. E-mailing of reports The testo 300 enables the convenient creation of documentation directly on site, and the dictation function even saves you typing in the process. You can send reports to the office or customers straight away via Wi-Fi. Keep an eye on all the measuring values You can see all the system's parameters right away on the large 5" HD display. Get the result faster Clearly structured menus for all relevant measurements are already stored in the measuring instrument and guide you efficiently through the application. Ready to use right away No more waiting time. In standby mode, the testo 300 is ready to measure at the touch of a button. Completely worry-free The testo 300 has quality sensor technology, measures high CO values up to 30,000 ppm and comes standard with the longest warranty in the industry. Truly robust: The construction. Smart measuring technology is of little benefit if it can't keep going in tough day-to-day working conditions, because your measuring instrument is a partner that supports you every day in the efficient, problem-free performance of your tasks. This is precisely why the testo 300 has a particularly resilient and high-quality construction. Protected display Scratch-resistant, recessed and with a special replaceable protective film. Secure mounting 4 strong magnets with rubber coating - particularly material friendly Bolted housing For that extra degree of stability when it really matters. Robust sensors Optional: extremely durable O2 sensor and automatic dilution up to 30,000 ppm CO. Truly flexible: Instrument configuration and probe system. A combustion analyzer perfectly tailored to your needs The testo 300 doesn't just give you smart operation - the configuration also has that certain something. This means you can choose between a 2-year and 4-year warranty for the sensor technology. In addition to O2 and CO, you can also add a third sensor slot for the measurement of NOx as an option. Various kits with special instrument configurations and individual accessories are available, specifically tailored to the requirements of your individual application.