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Flue Gas Analyser Buying Guide — The Best, Cheapest, and Most Popular

by | Sep 11, 2025

Plumbing & Heating

A flue gas analyser is a gas engineer’s most important tool. Without one, any commissioning, servicing, or repair work comes to a complete standstill.

But they’re also the most expensive, the most complex, and at times the trickiest tool to use.

For all the above reasons, buying the right analyser for your needs is critical to how well you can do your job. 

We’ve written this flue gas analyser buying guide to help you make that decision. Keep reading for the best options on the market, the cheapest flue gas analysers, and more.

Keep reading or jump ahead here:

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What are the best flue gas analysers?

To answer this question, we first need to think about what ‘best’ means in this context. 

The most feature-rich analyser? The most durable? The cheapest?

In reality, the best flue gas analyser is the one best-suited for the type of work you do. If you’re looking for well-featured and highly regarded analysers, you can’t go wrong with any these brands:

We know that each of these brands has a wide selection of different analysers and analyser kits. So where do you start?

 

Flue gas analyser buying guide

Since the best flue gas analyser will depend on the type of work you do, we’ve broken our recommendations down into different use cases.

Prices at time of writing (September 2025), excl. VAT. For guide purposes only.

 

 Domestic

Key requirements: Standard sensors for O₂, CO, and CO/CO₂ ratio calculation. Must be suitable for BS 7967 compliance and CPA1 assessments.

 Commercial & Light Commercial

Key requirements: High-range CO sensor (up to 10,000 ppm) and the option to add a NOx sensor for environmental checks.

 Commercial Catering (COMCAT)

Key requirements: In addition to combustion analysis, the key feature is an infrared sensor for measuring ambient CO₂ to check kitchen ventilation (for CP42 certificates).

 CO/Fume Incident Investigation

Key requirements: High accuracy at low ppm ranges and compliance with BS 7967 procedures for investigating CO incidents.

  • TPI 709R
    • Price: £420 (base price)
  • Anton Sprint Pro with CMDDA1 add-ons (Gas leak detector, personal CO alarm, ambient air probe)
    • Price: Varies
  • Kane: KANE-CMDDA1 Kit
    • Price: £1,159

 Industrial

Key requirements: Robust build, ability to measure a wider range of gases (like SO₂ and NO₂), and suitability for high-temperature and harsh environments.

 

Note that extra features don’t necessarily make a ‘better’ analyser. You can easily save money by getting one with only the features you need. 

For example, those doing purely domestic work might only need an analyser with tightness testing, flue gas analysis, and temperature differential. Granted, those doing commercial work will need a more complex analyser. 

The cheapest flue gas analysers

Some of the cheapest flue gas analysers on the market are models made by TPI. These devices, such as the DC710, lack a few peripheral features and a screen, meaning you’ll have to connect them to your phone to see the readings. This doesn’t make them any less accurate or reliable at measuring combustion gases, though. 

The TPI: DC710 is one of the best value for money flue gas analysers, currently retailing for around £340. 

You may also find models like the Anton Sprint Pro 2 on sale for not much more.

All Bluetooth-enabled analysers work flawlessly with Gas Engineer Software in the same way more expensive options do, so they can be a great way to save some money. 

You’ll also find some analyser models that use paper rolls to print out readings. These analysers might be cheaper, but you’ll spend lots of money topping up these rolls in the long run.

The most popular flue gas analysers

We surveyed our customers, and from 595 responses, here are the most popular brands:

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It’s clear that Kane and Anton have the lion’s share of the market, and are extremely popular amongst engineers.

For specific models, these were the most popular:

  • Kane 458s (and 458)
  • Anton Sprint Pro
  • Testo 300+

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