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0564 3004 84

testo 300LL Longlife - Flue gas analyser (O2, CO H2-compensated up to 30,000 ppm) with NO Sensor

testo 300 kit
testo 300
testo 300
testo 300
testo 300
testo 300
testo 300
The testo 300LL Longlife Flue Gas Analyser with NO Sensor is a durable professional combustion analyser with long-life O₂, CO H₂-compensated up to 30,000 ppm, and integrated NO measurement for advanced emissions testing. It is built for demanding boiler diagnostics and long-term field use. It is suited to boiler servicing and commissioning, CO and NO emissions checks, combustion efficiency testing and compliance reporting.
  • Advanced flue gas analyser with O₂, CO and NO measurement.
  • O₂ and H₂-compensated CO sensor up to 30,000 ppm.
  • Built for commercial boiler servicing and emissions testing.
  • Connect up to 4 testo Smart Probes for wireless parallel measurement.
  • Up to 6 years’ sensor service life for lower maintenance downtime.

testo 300LL Longlife Kit with Printer and NO Sensor

O₂, CO H₂-compensated up to 30,000 ppm, NO included
The testo 300LL Longlife Kit with Printer and NO Sensor is an advanced flue gas analyser kit for combustion analysis, high-range CO testing, NO emissions measurement, and professional on-site reporting.

How to Complete Combustion and NO Emissions Testing in One Kit

When engineers need to check both combustion performance and emissions, using one analyser saves time and improves consistency. This testo 300LL kit includes O₂ measurement, H₂-compensated CO measurement up to 30,000 ppm, and an NO sensor for nitric oxide measurement.
This makes it ideal for commercial heating systems, industrial burners, plant rooms, and sites where emissions performance is part of the service or commissioning process. Engineers can assess appliance efficiency, carbon monoxide risk, and NO output without needing a separate emissions instrument.

Why NO Measurement Matters for Commercial and Industrial Heating

NO measurement helps engineers understand more than basic combustion safety. It supports emissions-focused testing, burner optimisation, and technical reporting on larger or more regulated heating systems.
By measuring O₂, CO, and NO together, engineers can build a clearer picture of how the appliance is operating. This helps identify poor burner setup, excess emissions, incorrect air supply, and inefficient combustion.

Key testing capabilities include:

  • O₂ measurement for combustion air checks
  • H₂-compensated CO measurement up to 30,000 ppm
  • NO sensor included for emissions testing
  • Efficiency, CO₂, and excess air calculation support
  • Printed measurement reports for service documentation

How Longlife Sensors Reduce Downtime

Busy engineers need an analyser that remains ready for regular use. Longlife sensor technology helps reduce interruptions caused by frequent sensor replacement, supporting better tool availability across planned maintenance and commissioning work.
This is especially useful for service teams managing multiple sites. A more durable sensor platform helps improve workflow consistency and reduces the risk of delays during critical heating checks.

Why On-Site Printing Improves Reporting

Printed reports help engineers provide clear, immediate evidence of test results. This supports customer records, service history, internal quality checks, and facilities maintenance logs.
For example, after commissioning a commercial boiler, an engineer can measure O₂, CO, NO, and calculated efficiency values, then print a report for the site file before leaving. This creates a professional record of appliance performance at the time of testing.

Built for Advanced Combustion Analysis

The testo 300LL Longlife with NO Sensor is suited to demanding professional applications where accuracy, durability, and documentation are essential.
  • Commercial boiler servicing
  • Industrial burner commissioning
  • NO emissions measurement
  • High CO fault investigation
  • Gas and oil-fired appliance testing
  • Plant room maintenance and reporting
  • testo 300LL Longlife flue gas analyser with O2 and CO(H2 compensated) sensor up to 30,000 ppm via auto dilution + NO sensor (0633 3004 83)
  • USB mains unit, including cable (0554 1105)
  • Modular style flue gas probe, 180 mm; Ø 8 mm; Tmax. 500°C; 1.5 m hose; including cone for fixing (0600)
  • testo Bluetooth® connector (0554 3004)
  • Bluetooth / IRDA printer (0554 0621)
  • Hard carry case (0516 3300)

CO probes

Flue gas probes

Further probes

Temperature probes

Flue gas measurement on heating systems

Ideal for measurements involving heating systems:
  • high-quality Longlife sensors with a service life of up to 6 years, smart-touch operation, clearly structured measurement menus, creation of documentation on site, e-mailing of reports, large HD display, robust housing
Further areas of application:
  • gas flow pressure measurement*, gas pipe test*, differential temperature measurement (flow and return temperature on heating systems)*, ambient CO measurement*, flue draught measurement on heating systems*, integrated 4 Pa measurement for combustion equipment
* Please note: additional probes or accessories are required for these measurements and have to be ordered separately.
 
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Newman Lane
GU34 2URAlton
HampshireUnited Kingdom
01420 544433

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