What measurements can the Testo 300 Pro perform?

The Testo 300 Pro measures flue gas O₂, H₂-compensated CO (up to 30,000 ppm), NO, integrated micro-pressure, draft, ambient CO, and differential temperature. These capabilities make it a versatile tool for heating system diagnostics.

Are the sensors user-replaceable, and what is their lifespan?

The O₂ and CO LongLife sensors have a service life of up to 6 years, reducing the need for frequent replacements. Testo offers a warranty of up to 5 years on these sensors with product registration, demonstrating their durability.

What comes with the Testo 300 Pro analyzer, and what do I need to buy separately?

The package includes the Testo 300 Pro unit with integrated O₂, H₂-compensated CO, and NO sensors, along with a USB cable and power supply. Flue gas probes, ambient CO probes, and various temperature probes are sold separately to customise your kit.

Testo 300 Pro Combustion Analyzer 0633 3004 85

Name: Testo 300 Pro Combustion Analyzer
Brand: Testo
SKU: 0633 3004 85
Price: 9823.00 AUD
Availability: InStock

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The Testo 300 Pro Combustion Analyzer is purpose-built for heating engineers who need to quickly and accurately assess heating systems multiple times a day. It combines proven measurement technology with a modern Smart-Touch display, making light work of flue gas, draft, pressure, ambient CO, and differential temperature readings.

You know the drill: on a busy day, you need gear that just works, especially when you're up on a roof or in a tight boiler room. This unit is designed for heavy use in Australian conditions, providing reliable readings without fuss.

Best For

Heating engineers and technicians
HVAC service and maintenance teams
Apprentices learning combustion analysis

Compatibility

This analyzer is specifically designed for detailed combustion measurement on a wide range of heating systems. It comes equipped with sensors for O₂, H₂-compensated CO up to 30,000 ppm, and NO, suitable for most common heating applications. If you're running a different model or specific industrial setup, check the required measurement ranges and probe types before ordering.

Features

Integrated O₂, H₂-compensated CO (up to 30,000 ppm), and NO sensors for comprehensive flue gas analysis.
LongLife sensors for O₂ and CO with up to 6 years service life, plus automatic sensor protection.
Smart-Touch display and intuitive menus for fast, smartphone-like operation.
Integrated draft and gas zeroing without removing the probe, saving time on the job.
Magnetic holder for easy fixing to boilers or metal surfaces during measurements.
On-site documentation with customer signatures and e-mail report functionality via WiFi hotspot.

Technical Specifications

Parameter	Measuring Range	Accuracy	Resolution
Temperature (Type K TC)	-40 to +1200 °C (-40 to 2192 °F)	±0.5 °C (0.0 to +100.0 °C) ±0.5 % of mv (Remaining Range)	0.1 °C (-40 to +999.9 °C) 1 °C (Remaining Range)
Differential Pressure	-100 to +200 hPa (-40 to +80 InH₂O)	±0.5 hPa (0 to +50.0 hPa) ±1 % of mv (+50.1 to +100.0 hPa) ±1.5 % of mv (+100.1 to +200 hPa)	0.01 hPa
Flue Gas O₂	0 to 21 Vol.%	±0.2 Vol.%	0.1 Vol.%
CO (H₂-compensated)	Up to 30,000 ppm	Not specified beyond compensation	Not specified
Battery Life	Approx. 10 hours
Display	5-inch HD Smart-Touch

What's in the Box

Testo 300 LongLife Combustion Analyzer unit
Integrated O₂ sensor
Integrated H₂-compensated CO sensor (up to 30,000 ppm)
Integrated NO sensor
USB cable with power supply

Using It on the Job

Initial Setup: Power on the analyzer. The standby mode ensures it's ready to measure almost instantly, saving precious time between jobs.
Probe Connection & Zeroing: Select the appropriate flue gas probe (ordered separately) and attach it. Perform an integrated draft and gas zeroing; no need to remove the probe from the flue.
Secure Placement: Use the integrated magnets to fix the analyzer securely to the boiler casing or other metal surfaces while you work, keeping it safe and visible.
Take Measurements: Navigate the intuitive Smart-Touch menus to perform flue gas, draft, pressure, or differential temperature measurements. The large HD display shows all parameters clearly.
Document & Report: Create detailed reports on-site, including measuring values and customer data. Get the customer's signature directly on the device, then e-mail the PDF report back to the office or client via WiFi hotspot.
Post-Job Care: After use, gently wipe down the analyzer and probe, and ensure it's fully charged for the next job. The automatic sensor protection helps extend sensor life.

Limitations & Safety Notes

Probes for specific measurements (e.g., flue gas, ambient CO, clamp temperature) are sold separately. This unit is the analyzer only.
Always refer to the manufacturer's instruction manual for full operating procedures and safety guidelines.
Ensure proper ventilation when working on combustion systems and always wear appropriate Personal Protective Equipment (PPE).
While robust, avoid dropping the instrument or exposing it to extreme impacts, which can affect sensor calibration.

Tradie Pro Tip: Get into the habit of performing the integrated draft and gas zeroing every single time. It takes seconds and ensures your readings are spot on, saving you a potential callback later.

Pair With

Pair the Testo 300 Pro with a suitable flue gas probe, clamp temperature probes, or an ambient CO probe from HVAC Shop for a complete heating system analysis kit. Don't forget a protective case to keep your investment safe on the ute.