Welcome to our 5-minute guide to the best flue gas analysers on the market today.
There’s no doubt gas analysers are expensive. But, if you’re planning on doing a boiler service or testing flues, you’re going to need one.
If you’re outlaying big chunks of cash, you need to be sure you’re making the right purchase.
There’s a tonne of brands. And, they’ve got lots of different flue gas analysers on offer.
Our quick guide is going to cover the best brands, and the best value analyser for functionality, and the money.
Please note: Gas checks should only be made by qualified engineers on the Gas Safe Register. If you are not Gas Safe registered, find someone who is to do your flue gas tests.
Skip straight to the end of the article if you want to see our 30-second review verdict.
Testo gas analysers are first on our list. They’re a brand that need no introduction in the testing space, and consistently get top quality online reviews.
We’ll be looking at the Testo 310 and the Testo 327-1. They’re at the lower end of the price spectrum, as some of their analysers are £1,000 and beyond!
If you’re looking for a simple and easy to use flue analyser, the Testo 310 is the perfect choice.
It allows heating engineers to take all basic measurements from heating systems, as well as more complex combustion measurements.
This includes Direct O2, CO, flue gas and ambient temperature. You’ll be able to switch from Wood, Biomass, Fuel Oil, Propane and Natural Gas easily using the on-screen display, which is back lit in case lighting isn’t perfect.
It’s quick to fire up, and you’ll be able to start testing within 30 seconds of turning the 310 on. That’s something that can’t be said for many of the cheap gas analysers on the market.
And, you won’t need to charge it when out on call, because it’s got a long 10-hour battery life. Even if you do, there’s a USB charging function.
A bit clumsy? No problem. The Testo 310 is hard wearing, and will withstand a few drops.
There’s probe filters and a condensate trap included, so you can keep it fresh.
At just over £400, it offers excellent value for money.
Like the 310, the Testo 327-1 has a simple display, and is easy to navigate.
It’s incredibly lightweight. The 310 sits at around 700g. At 500g, you’ll hardly notice the 327 is there, and it has a much more durable feel than the 310.
You’ll be able to grab the draught measurements, as well as the Ambient CO measurement using flue gas probe. The CO measurement (undiluted) can be stored.
Alongside this, you’ll get the option to get the combustion efficiency, °C, O2, CO2 and CO levels.
You can measure in a range of -40 to +600 °C and 0 to 99.9% to grab anything from 0 to 4000 ppm.
The Testo 327-1 analyser is lower on battery power with 5 hours, but that’s more than enough between charges.
Let’s jump into the Anton flue gas analyser range.
The top choice in the Anton range is currently the Anton eVo2Kit3 Sprint.
Priced at £760, it’s hardly the cheapest flue gas analyser out there. But, is it worth the cash?
Anton have given the eVo2Kit3 Sprint the ability to offer engineers a tonne of test possibilities. This includes temperature and efficiency readings, draft and differential measurements and the ratio of CO/CO2.
As you’re going through a boiler flue test, you’ll be able to store up to 200 readings ready for the printout. And, that can be viewed on the display, or fired straight over to your PC ready to print. So, you don’t need a separate printer.
It’s got everything you need from a flue gas analyser. Whether it’s a time CO build-up test, or a multi-fuel functionality, it’s got you covered.
Out of the box you’ll get a calibration certificate and 12 months warranty. You’ll have this 12 months extended by a further 12, if you get an annual calibration.
You’ll get instructions, a probe and batteries. But, if you want a carry case, you’ll need to buy that separately.
Looking for a cheap flue gas analyser? Well, cheap and gas analysers are rarely in the same sentence, but here is what we found.
At around £300 you can’t knock the Regin Regxa1 analyser. You’ve got all the domestic fuel capability you need (gas, butane, LPG and oil) and you’ll get a 12-month warranty.
Like many of the other analysers, you’ll need to buy a storage case separately and that’s advisable, given how expensive they are.
Kane flue gas analysers are probably the most well-known in the testing industry. But, that brand recognition certainly has a price attached to it.
We’ll cover the Kane 455 CPA1 Kit, and the cheaper 455.
With the Kane 455 CPA1 Kit, you’ll get the Full Monty. This includes gas leak detector, quality BS7967 CO probes, a calibration certificate and of course, a printer. It really is the full package and is suited to those that run flue tests regularly.
But, you’d expect that for the hefty price tag of around £850.
Test selection is easy here. There’s a rotary dial, and that allows you to switch to whatever test procedure you need to carry out quickly.
From a technical stand point, you’ll be able to measure O2, CO2 and CO in the 0-2000ppm range.
You’ll also get differential pressure and temperature readings.
Working on alternative energy heating systems? No problem. You’ve got excess air and efficiency ratings for multi-fuel, as well as oils and gas.
You’ll be able to store 99 different combustion tests. And, that’s not all. You’ll be able to hold data for 20 room based CO readings, temp readings, tightness and pressure tests.
Like the full 455 CPA1 kit, the standard Kane 455 pack offers an easy to use system, with easy to read display.
Measurements are the same, at 0-2000ppm and the same storage is on offer (i.e. 99 combustion tests, 20 for each room CO, temp, tightness and pressure tests).
You’ll get a tonne of kit with your purchase include 4 x batteries, manual, infrared printer, a KMCP2 probe and a rubber boot to protect the analyser.
We’re liking Testo here for both functionality and price. They offer mid-priced products with top-end features.
So, if you’re budget can stretch, we’d be heading for something like the Testo 327-1 flue analyser.
That’s going to weigh in at around 200g lighter than it’s 310 counter-part, not to mention it having extra features.
But, if you’re strapped for cash or don’t regularly use a flue gas analyser, the Testo 310 will do the trick.
There’s both a Standard and Printer kit available. The Printer kit is going to mean you don’t have to manually note all measurements.
It’s around £100+VAT more expensive. And, we think that’s a bargain, given if you buy the printer separately to the 310 package, you’ll be paying closer to £200+VAT.
Thanks for reading our 5-minute guide to the best flue gas analysers.
Not sure which flue analyser to buy, or bought one not mentioned above and got an opinion on it that you want to share?
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