testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95
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testo 300+ Flue Gas Analyser Handset only - (O2, CO Sensor up to 8,000 ppm) 0633 3004 95

£472.50
£472.50
£630.00
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Next Day Tracked DPD Delivery
Limited Stock Availability Hurry!

Next Day FREE Delivery

FREE SelectaDNA Kit, FREE Head Torch! 

Autumn Sale Receive x2 FREE GIFTS!

Free SelectaDNA Tool Marking Kit! 

Protect your tools with Testo.

The message is loud and clear.

At Testo, we are serious about fighting tool theft. In the UK there is an event of tool theft every 12 minutes. That is why we have partnered with @TheGasExpert & SelectaDNA to help tackle this issue head on and protect the livelihood of tradespeople.

What is SelectaDNA?

SelectaDNA have created a transparent liquid that can be applied to tools. Each bottle of this liquid has a DNA code which is entirely unique. Although invisible to the eye. This solution shows up when a UV light is shone upon it. This means when police recover stolen tools, they can actually reunite them with their rightful owners. This solves a huge issue in where police are recovering millions of £ worth of tools, but are unable to determine who they belong to.

Hurry, Offer valid from 01/09/2025 to 31/12/2025!

Your benefits
Designed for domestic boiler service, 8,000ppm H2 compensated CO sensor and O2 sensor 
Efficient, wireless parallel measurement of up to four testo Smart Probes simultaneously 
Practical second screen function and easy data integration into user-specific software via QR code output
CO sensor and O2 sensor fitted with 5 year lifespan
Wired clamp probes and manometer allow wireless measurement of flow/return temperature alongside gas pressure and differential temperature
Handset-only upgrade for existing testo FGA owners to covert to the innovative testo 300+ touchscreen FGA: this analyser is supplied with 5-year lifespan O2 and CO sensors (8,000ppm H2 compensated) and an automatic pump shut off to prevent over-ranging.  Note that this is the handset only and does not include sampling probe, case etc. 
The all new Testo 300 black 
With dual screen technology 


 
The latest. Take a look at what’s new right now.

Truly smart flue gas measurement on heating systems with the testo 300 flue gas analyzer. High-quality sensors, intuitive operation with smart-touch technology and smart features, such as efficient documentation and e-mailing of reports, will make your day-to-day work easier.



Why choose Testo-Shop to provide your equipment?

  • Live stock availability clearly shown on all products 
  • Guaranteed Next Day delivery on all stocked products purchased by 3pm 
  • Same day click and collect service from our Poole sales and service centre
  • All Flue Gas Analysers are supplied with brand new 12 month certificate of calibration from the date of purchase
  • Rapid Same Day Servicing when your analyser is due calibration 
  • Technical assistance and sales support on 01202 656169

 

 Unsure of which flue gas analyser to purchase?

 There are plenty to choose from! but we can cut through the jargon and help you decide with our Free Personal Demonstration via video call

  • Did you know that we offer free personal one-to-one consultation and demonstrations via video calls from our showroom,  one of our experienced technicians will answer any of your flue gas analyser questions that you may have, and help you select the most appropriate flue gas analyser for your needs
  • Please contact us via email to orders@compli-direct.uk or call 01202 656165 to book in a free consultation live from our showroom.
  • We can offer videos calls to you on the following platforms: Facebook messenger, FaceTime, Zoom, Teams or WhatsApp.
  • Truly smart flue gas measurement on heating systems with the testo 300 flue gas analyzer. High-quality sensors, intuitive operation with smart-touch technology and smart features, such as efficient documentation and e-mailing of reports, will make your day-to-day work easier.

 

The user-friendly Testo 300 was developed with precisely this objective in mind. With smart-touch operation, robust construction and e-mailing of reports, the Testo 300 will quickly become your indispensable companion for all measuring tasks involving heating systems.

Smart, intuitive, efficient: easy operation in day-to-day work

  • Smart-touch display for intuitive operation of the flue gas analyzer: the display responds without delay – just as easy as on your smartphone
  • Get the measurement result faster: clearly structured measurement menus for all relevant measurements
  • Create documentation (including measuring value, measuring location, customer data) easily on site
  • Save PDF measurement reports directly in the instrument and always have them available
  • Signature function: your customer can sign measurement reports directly on the instrument
  • E-mail measurement reports directly to the office or to customers via WLAN (hotspot)
  • Large 5-inch HD display – enables you to see all the system's parameters immediately
  • Testo interface function for direct data transfer of measuring values to industry/customer-specific software*
  • Ready to use straight away: in standby mode, the testo 300 is ready to measure at the touch of a button. Use it straight away with the next customer – because you no longer need to wait for the end of the zeroing phase
  • Integrated Bluetooth® interface: immediate printout of the measuring values on site with the appropriate printer (Not supplied with this kit).

 

Description

•    For testing domestic gas & oil boilers
•    Flue gas, tightness & let-by, differential temperature & pressure, ambient CO, & draught measurent menus
•    5 year sensors for reduced service costs
•    8,000 ppm CO sensor with H2 compensation and automatic pump shut off to prevent over-ranging
•    EN50379-1/3 and BS7967 compliant
•    20% H2 ready
•    Bluetooth USB dapter supplied for connectivity to testo Smart Probes
 

Delivery Scope

testo 300+ flue gas analyser with enhanced 5 year lifespan sensors for reduced service costs - O2 and H2 compensated  CO sensor up to 8,000 ppm (0633 3004 40), USB mains unit, including cable (0554 1105), includes testo Bluetooth connector (0554 3004) for smart probe connectivity.

See Product Brochure