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testo 327-1 - Flue Gas Analyser (advanced kit)

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The testo 327 Advanced Kit is a professional flue gas analyser package for engineers who need reliable combustion testing and enhanced boiler diagnostics. It measures key flue gas values to help assess appliance performance, safety and efficiency during servicing or commissioning. It is ideal for advanced boiler servicing, combustion efficiency checks, emissions testing and heating system fault diagnosis.
  • Advanced Kit - including analyser, probe, testo IR Printer, 2x temperature clamp probes, case, and power supply.
  • Measures O₂, CO, temperature, draught and pressure.
  • Clear display and intuitive menus for fast on-site use.

testo 327 Advanced Kit

The testo 327 Advanced Kit is a professional flue gas analyser package for boiler servicing, commissioning, and advanced combustion diagnostics.

How to Improve Boiler Diagnostics with an Advanced Flue Gas Kit

When engineers need more than a basic analyser setup, the testo 327 Advanced Kit provides a stronger foundation for regular heating work. It supports accurate combustion analysis during servicing, commissioning, burner adjustment, and fault diagnosis.
The advanced kit format helps engineers arrive prepared for a wider range of site tasks. This is useful when working across domestic boilers, light commercial heating systems, and plant room environments.
Clear combustion data helps engineers make better decisions on site. Instead of relying on symptoms alone, they can measure performance and confirm whether an adjustment has improved appliance operation.

Why Accurate Combustion Readings Help Prevent Repeat Callouts

Repeated boiler faults often come from incorrect burner setup, poor flue performance, or incomplete combustion. The testo 327 helps engineers identify these causes by measuring key flue gas values.

The analyser supports:
  • CO measurement: Helps identify incomplete combustion and safety risks.
  • O₂ measurement: Supports air-to-fuel ratio checks.
  • Flue gas temperature: Helps assess heat transfer and system performance.
  • Calculated values: CO₂, efficiency, and excess air support clearer diagnosis.
  • Real-world application: If a boiler shows poor efficiency after servicing, engineers can check the readings, adjust the burner, and retest immediately.

Solving Efficiency and Safety Problems on Site

Poor combustion can increase fuel use, raise emissions, and create unsafe CO levels. The testo 327 Advanced Kit helps engineers detect these issues during planned service work or fault investigation.
The clear measurement values help confirm whether the appliance is operating within expected performance ranges. This supports safer maintenance, better customer communication, and fewer unresolved faults.

Streamlining Service Work with Accessories and Calibration

A professional analyser performs best when supported by the right accessories. The testo 327 Advanced Kit can be connected to compatible Testo flue gas probes, printer options, replacement filters, consumables, and calibration services.

Built for Professional Heating Work

The advanced kit is designed for engineers who need a dependable analyser setup for varied service tasks.
  • Advanced kit format: Supports wider diagnostic work.
  • Clear flue gas readings: Helps speed up fault finding.
  • Practical handheld use: Suitable for tight service spaces.
  • Compatible accessories: Supports long-term professional use.

General technical data

Weight
(with probe) Approx. 700 g
Dimensions
201 x 83 x 44 mm
Operating temperature
-5 to +45 °C
Display type
LCD (Liquid Crystal Display)
Display function
Backlit 2-line display
Power supply
Battery: 1500 mAh, mains unit 5V/1A
Storage temperature
-20 to +50 °C

Temperature - TC Type K (NiCr-Ni)

Measuring range
-40.00 to +600.00 °C
Accuracy
±0.50 °C (0 to 99.90 °C)
±0.50 °C (100 to 600 °C)
Resolution
0.1 °C
Reaction time
< 50 s
Temperature (ambient temperature)

Flue gas O₂

Measuring range
0 to 21 Vol.%
Accuracy
±0.2 Vol.%
Resolution
0.1 Vol.%
Reaction time t₉₀
30 s
testo 327 Flue Gas Analyser, rechargeable battery and calibration protocol, Flue Gas Probe (180mm x 6mm diameter), Pressure hose connection kit, Differential temperature kit (2 x pipe clamp probes), testo infrared printer, soft carry case with shoulder strap, AC power supply.
Contact Us
Testo Ltd
Newman Lane
GU34 2URAlton
HampshireUnited Kingdom
01420 544433

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