Testo 300 LongLife Combustion Analyzer

The Testo 300 LongLife Combustion Analyzer is your go-to tool for reliable diagnostics and compliance checks on heating systems. Designed for tradies who are on and off multiple jobs daily, it combines robust build quality with modern Smart-Touch operation for quick, accurate readings.

Having to re-do a flue gas test because the old gear dropped out mid-job is a waste of daylight, especially during a busy Australian winter. This analyser streamlines your workflow, letting you focus on the fix, not fiddling with your tools.

Best For

• Heating engineers and gasfitters
• HVAC installation and commissioning teams
• Maintenance and service technicians
• Apprentices learning combustion analysis

Compatibility

This Testo 300 model includes factory-fitted O₂, CO (up to 4,000 ppm), and NO sensors, making it suitable for a wide range of gas and oil-fired heating systems. It's designed to work with Testo's ecosystem of quick-change flue gas probes, temperature probes, and differential pressure accessories, which are available separately.

If you're running a different model or need specific measurements, always check fittings and specs before ordering additional probes.

Features

• Smart-Touch Display: Intuitive 5-inch HD display responds quickly, similar to a smartphone, for easy navigation and clear data visibility.
• LongLife Sensors: Equipped with O₂ and CO sensors designed for a service life of up to 6 years, reducing replacement frequency.
• Integrated Micro-Pressure Measurement: Quickly test draft and differential pressure without additional modules.
• On-Site Documentation & Reporting: Create, save, and e-mail PDF measurement reports directly from the instrument via WiFi (hotspot function).
• Versatile Probe System: Quick-change click system allows for fast swapping between various probe shafts (sold separately) for different applications.
• Magnetic Holder: Integrated, extra-strong magnets securely fix the analyser to metal surfaces, leaving your hands free for the job.
• Quick Start Standby: Ready to measure at the touch of a button from standby, eliminating waiting time for zeroing.

Technical Specifications

What's in the Box

• Testo 300 LongLife Combustion Analyzer with O₂, CO (up to 4,000 ppm) and NO sensors
• USB mains unit
• Testo Bluetooth Connector

Using It on the Job

1. Power Up & Zero: Turn on the analyser and allow it to perform its automatic zeroing cycle, ensuring a fresh calibration for accurate readings.
2. Attach Probe: Select and attach the appropriate flue gas probe (sold separately) for the system you're testing. Ensure it's securely connected.
3. Position Probe: Insert the probe into the flue gas duct according to manufacturer guidelines, ensuring correct depth for representative sampling.
4. Run Tests: Navigate through the Smart-Touch menu to perform flue gas analysis (O₂, CO, NO), differential pressure, and draft measurements as required.
5. Review & Adjust: Monitor live readings on the large HD display. Make any necessary adjustments to the heating system based on the data.
6. Document & Report: Utilise the on-board documentation features to create a report, get customer signatures directly on the screen, and email the PDF to your office or client.
7. Post-Use Care: Remove and properly clean your probe. Store the analyser in its case to protect the display and sensors from damage between jobs.

Limitations & Safety Notes

• Flue gas probes, temperature probes, and other accessories are sold separately and are essential for most measurements.
• Any work on gas appliances requires appropriate licensing, such as an ARCtick licence for refrigerant components or specific gasfitting licences for natural gas/LPG systems.
• Always follow the manufacturer's guidelines for sensor protection, especially when exposing to high CO concentrations.
• Ensure the chosen probe is rated for the expected flue gas temperatures to prevent damage.
• Adhere to all relevant Australian safety standards and Safe Work guidance when operating heating systems and test equipment.

Tradie Pro Tip: Those LongLife sensors are a real time and money saver. To get the full 6 years out of them, always let the analyser run its fresh air purge after each job. It clears out any residual flue gas and keeps the sensors happy.

Pair With

Complement your Testo 300 LongLife Combustion Analyzer with additional Testo flue gas probes, a Testo differential pressure measuring instrument, or the Testo EasyHeat PC software for advanced data management and analysis.