Upgrading your flue gas analyser (FGA) can be a risky undertaking. The last thing you want to do is spend money on a new tester only for it to be stolen with no chance of recovery. Thankfully, Testo’s autumn offer takes the jeopardy out of buying a new FGA. Between 1st September and 31st December 2025, when you purchase a Testo 310, 327-1, or 300+ Flue Gas Analyser Kit, you’ll receive a free SelectaDNA Tool Marking Kit designed to prevent tool theft.
Quick Links
- Testo Flue Gas Analyser Autumn Offer Fights Tool Theft
- Purchase a Testo 310 & Help Defend Against Tool Theft
- Invest in a Testo 327-1 to Shield Your Livelihood From Tool Theft
- Buy a Testo 300+ to Assure Your Future
- Further Information
Testo Flue Gas Analyser Autumn Offer Fights Tool Theft
Did you know that tool theft occurs every 12 minutes in the UK?
Protect your tools with Testo - for the remainder of 2025, when you buy a Testo 310, 327-1, or 300+ Flue Gas Analyser or FGA Kit, you’ll receive a free SelectaDNA Tool Marking Set worth over £50.
United Against Tool Theft: How the SelectaDNA Tool Marking Kit Works
SelectaDNA’s Tool Marking Kit isn’t just about protecting your tools. It helps preserve your livelihood and aids the police in returning thousands of pounds worth of stolen tools to their rightful owners.
Including stickers, warning labels, and a unique 8ml bottle of SelectaDNA Tool Marker, this free £50 set can protect over 50 tools!
Stop Theft. Safeguard Your Livelihood. Secure Your Future with Testo.
The SelectaDNA Tool Marking Kit comprises:
- 4x Window Stickers – intimidate thieves, show them your home and van are protected
- 50x Tamper-resistant Warning Labels – place on your tools to deter robbers
- 8ml Bottle of Unique SelectaDNA (with microdots) – make it easy for the police to return your tools to you
- SelectaDNA Membership Card – free life-long membership ensures tool protection throughout your career
- Blue-stick Applicator
- Instruction Leaflet
The Gas Expert Explains How to DNA Mark Your Tools
Testo has united with The Gas Expert against tool theft. In the following video, The Gas Expert explains how to DNA mark your analyser, ensuring that, in the event of a theft, it can be easily returned to you by the police.
Step 1: Apply the SelectaDNA solution to a few areas of your analyser. This solution will only show up under UV light.
Step 2: Register your unique DNA code on SelectaDNA’s secure database. This database is shared with the police so that tools can be returned to their rightful owners. As part of this offer, you will receive free database membership for life!
United Against Tool Theft – Protect Your Tools with Testo
Purchase a Testo 310 & Help Defend Against Tool Theft
Combining simple functions with precise measurement, the Testo 310 Combustion Analyser is perfect for basic measurements of domestic heating systems.
- Measure O2, CO, temperature, draught, pressure, efficiency, & flue gas loss - all the tests you need to inspect domestic heating systems safely and comprehensively
- 30-second sensor zeroing - take accurate readings and protect your reputation as a reliable professional
- Intuitive menu - complete jobs quickly with easy, fast operation
- Connect to the Testo Smart App via Bluetooth - finish all work on site: calculate gas flow pressure, flow, and return temperature, and document and send readings
- 8-hour battery life - carry out a full day's work without worrying about recharging
Invest in a Testo 327-1 to Shield Your Livelihood From Tool Theft
Work faster and smarter with the Testo 327-1 Flue Gas Analyser. Thoroughly investigate boilers with this entry-level combustion analyser.
- Measure O2, CO, CO2, temperature, draught, pressure, efficiency, & flue gas loss - safely and comprehensively assess boilers
- Robust with a protective sheath and condensate trap - ready for any environment your job takes you
- Stable measurements within 30 seconds - complete tests quickly and reliably
- Plug and play sensors and probes - expand the analyser's testing capacity to meet the challenges of your job
Buy a Testo 300+ to Assure Your Future
The Testo 300+ is a comprehensive combustion analyser suitable for domestic boiler checks and services.
- Measure O2, CO, CO2, temperature, draught, pressure, efficiency, & flue gas loss - provide customers with a comprehensive boiler assessment
- Adaptable design - space for an NO sensor and compatibility with Testo Smart Probes expands the analyser's measurement capacity so it can check and service commercial boilers if required
- Connect to the Testo Smart App via Bluetooth - create and send reports on-site, no more taking work home
- Large touchscreen - view all readings simultaneously, improves job ease and efficiency
- Robust plastic casing, scratch-resistant screen, and magnetic holder - will meet the challenges of demanding settings
Further Information
For more information about Testo’s flue gas analyser autumn offer and how it can secure your livelihood, contact our Sales team on 01642 931 329 or via our online form.
In the meantime, please browse our extensive selection of Testo flue gas analysers and claim your free £50 SelectaDNA kit today!




