The Testo 300 LL COMM IND (catalog number 0564 3004 95) is a commercial / industrial combustion analyzer with O2 and CO sensors. CO measurement is 0 - 8,000 ppm or with dilution to 30,000 ppm. This model features long life sensors and a sensor warranty of four years, as well as a slot for a third sensor. It does not include a printer or an NO sensor for NOx measurement.

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.

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.

Versatile probes - quickly changed
 

One handle for a variety of probes A variety of probe shafts can easily be attached to the multi-functional handle. This ensures you enjoy a high level of flexibility in all applications. And you are ready to measure even more quickly, thanks to connection via a universal plug.	Proven probes You can use the testo 320, testo 330 and testo 330-1/-2 LL probes with their practical multiple plug for the testo 300 as well.	New probes New probes with anti-rotation USB C connection are available for temperature measurement, for example of flow and return temperatures, along with ambient CO measurement.

Testo offers several variations of its 300 series combustion analyzer. The 300 is available with NOx sensors, specialized long life sensors, a printer, as well as higher range CO detection. The following is an overview of each. For detailed information on part numbers and features, please see the Q&A section of this page.

	testo 300	testo 300 Longlife	testo 300 Longlife (30,000 ppm CO)
Fuels	Oil, gas, solid fuels	Oil, gas, solid fuels	Oil, gas, solid fuels
Sensor slots	O2, CO	O2, CO, NO - can be retrofitted	O2, CO H2-compensated, NO - can be retrofitted
Measuring ranges	CO: 0 to 4,000 ppm	CO: 0 to 4,000 ppm	CO H2-compensated: 0 to 30,000 ppm (by fresh air dilution)
Longlife sensors with up to 6 years' service life	–	✔	✔
Flue gas loss measurement	✔	✔	✔
Draft measurement	✔	✔	✔
Differential / gas flow pressure measurement	✔	✔	✔
Error and sensor diagnosis	✔	✔	✔
Zeroing with probe in flue gas	–	–	✔
PDF reports	✔	✔	✔
Signature function	✔	✔	✔
Warranty (instrument, probe, O2 and CO sensors)	2 years	4 years (NO sensor 2 years)	4 years (NO sensor 2 years)
Warranty with product registration	3 years	5 years	5 years
Display	5" HD touch display (1280 x 720 pixels)	5" HD touch display ​(1280 x 720 pixels)	5" HD touch display ​(1280 x 720 pixels)
Memory	1,000,000 readings	1,000,000 readings	1,000,000 readings
PC software	testo EasyHeat software	testo EasyHeat software	testo EasyHeat software
Instrument operation	via smart-touch display	via smart-touch display	via smart-touch display