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testo 300+ Flue Gas Analyser smart kit - (O2, CO sensor up to 8,000 ppm)

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testo 300
Application testo 300 SE Longlife
Application testo 300
testo 300
testo 300
Application testo 300
testo 300
testo 300
testo 300
The testo 300+ Flue Gas Analyser Smart Kit is a connected professional combustion testing package for modern heating engineers. It combines accurate flue gas measurement with smart digital workflows to simplify boiler servicing, diagnostics and reporting. It is ideal for boiler servicing and commissioning, digital reporting, combustion efficiency checks, CO safety testing and emissions documentation.
  • Fast and easy to operate: intuitive measurement menus and fast-response Smart-Touch display
  • Designed for domestic boiler service, 8,000ppm H2 compensated CO sensor and O2 sensor fitted with 5 year lifespan
  • Bluetooth clamp probes and manometer allow wireless measurement of flow/return temperature alongside gas pressure and differential temperature.
  • Efficient, wireless parallel measurement of up to four testo Smart Probes simultaneously 

testo 300+ Flue Gas Analyser Smart Kit

The testo 300+ Smart Kit is a connected flue gas analyser package for combustion testing, boiler servicing, and digital reporting workflows.

How to Make Boiler Testing Smarter and More Efficient

When engineers need accurate readings and faster reporting, the testo 300+ Smart Kit supports a more connected workflow. It combines professional flue gas analysis with smart measurement handling, helping engineers test, record, and manage results more efficiently.
This is useful when working across multiple service visits in one day. Engineers can capture combustion data clearly and support digital reporting processes without relying heavily on handwritten notes.
The smart kit format is ideal for heating professionals who want modern measurement technology for domestic, commercial, and light industrial heating systems.

Why Digital Workflows Improve Service Accuracy

Manual recording can lead to mistakes, missing readings, or delays after the job. The testo 300+ Smart Kit helps reduce these issues by supporting digital measurement workflows and clearer data handling.

The analyser supports combustion measurements such as:
  • CO and O₂ measurement: For combustion safety and air-to-fuel ratio checks.
  • Flue gas temperature: For efficiency and appliance performance assessment.
  • Draught and pressure support: For flue and system checks.
  • Calculated values: CO₂, excess air, and efficiency for clearer diagnostics.
  • Real-world application: Engineers can complete a boiler service, record combustion results, and support a professional report while still on site.

Solving Reporting and Documentation Challenges

Customers, landlords, and facilities teams often need clear evidence of service work. The testo 300+ Smart Kit supports more efficient documentation by making measurement data easier to manage.
This helps engineers create consistent records for service history, internal quality checks, and maintenance reports. It also improves customer confidence by showing that boiler performance has been measured professionally.

Streamlining Your Connected Toolkit

The testo 300+ Smart Kit can be linked with compatible Testo probes, printer options, calibration services, replacement filters, and consumables. It also pairs well with gas leak detectors, Smart Probes, differential pressure meters, gas pressure test kits, and temperature measuring instruments.

Built for Modern Heating Engineers

The testo 300+ Smart Kit is designed for professionals who want accurate testing and better data handling.
  • Smart kit format for connected workflows
  • Suitable for domestic and commercial boiler testing
  • Supports digital reporting and service records
  • Compatible with selected Testo accessories and calibration services
  • testo 300+ flue gas analyser with O2 and CO sensor up to 8,000 ppm (0633 3004 40)
  • USB mains unit, including cable (0554 1105)
  • Compact basic flue gas probe, 180 mm; Ø 6 mm; Tmax. 500°C; 1.5 m hose; including cone for fixing (0600 9740)
  • 1 x testo 510i Smart probe manometer (0560 1510)
  • 2 x testo 115i Smart probe pipe clamp thermometers (0560 2115 02)
  • testo Bluetooth connector (0554 3004)
  • soft-case style Instrument bag (0516 3001)

CO probes

Flue gas probes

Further probes

Temperature probes

Flue gas measurement on heating systems

Ideal for measurements involving heating systems:
  • high-quality sensors, 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*
* Please note: additional probes or accessories are required for these measurements and have to be ordered separately.
 
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HampshireUnited Kingdom
01420 544433

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