Flue Gas Analysers

  1. Free Accessory + Flue Cleaning Brushes
    Testo 310 Flue Gas Analyser - Standard Kit
    Testo logo
    In Stock
    Free UK Delivery
    Testo 310 Flue Gas Analyser - Standard Kit
    (1)
    £417.60 £348.00
    • Handheld, easy-to-use analyser ideal for all basic measurements
    • Dual-line display shows two parameters at the same time
    • Condensate trap, automatic zeroing, exchangeable probe filters and much more
    348 Reward Points
    Price Match Guarantee
    5633100
  2. Free Accessory + Flue Cleaning Brushes
    Testo 310 Flue Gas Analyser - Advanced Kit w/ Printer
    Testo logo
    4 In Stock
    Free UK Delivery
    Testo 310 Flue Gas Analyser - Advanced Kit w/ Printer
    (1)
    £519.60 £433.00
    • Special version of the Testo 310 with infrared printer + spare paper rolls
    • Simple, quick and easy - measure, print and get jobs done faster
    • Ideal for any professional boiler installer
    433 Reward Points
    Price Match Guarantee
    5633110
  3. FREE Testo Socket Set
    Testo 327-1 Flue Gas Analyser - Standard Kit
    Testo logo
    In Stock
    Free UK Delivery
    Testo 327-1 Flue Gas Analyser - Standard Kit
    (1)
    £526.79 £438.99
    • Measure four parameters simultaneously
    • Fast response and easy to use
    • Ideal for those looking for an entry-level tester
    438 Reward Points
    Price Match Guarantee
    0563320370
  4. FREE Testo Socket Set
    Testo 327-1 Flue Gas Analyser Standard Kit & Gas Leak Detector
    Testo logo
    In Stock
    Free UK Delivery
    Testo 327-1 Flue Gas Analyser Standard Kit & Gas Leak Detector
    (no reviews)
    £597.44 £497.87
    • Testo Gas Leak Detector
    • Standard Case
    • Standard Probe
    497 Reward Points
    Price Match Guarantee
    05631327
  5. FREE Testo Socket Set
    Testo 300 Flue Gas Analyser
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300 Flue Gas Analyser
    (no reviews)
    £622.80 £519.00
    • A Testo 300 housed in a limited-edition black casing
    • Measure O2, flue CO, ambient CO, temperature, draught and pressure
    • Fast-response, recessed, scratchproof 5” HD touchscreen display
    519 Reward Points
    Price Match Guarantee
    0633300278
  6. FREE Testo Socket Set
    Testo 327-1 Flue Gas Analyser - Advanced Kit with Printer
    Testo logo
    In Stock
    Free UK Delivery
    Testo 327-1 Flue Gas Analyser - Advanced Kit with Printer
    (1)
    £649.20 £541.00
    • Comprehensive flue gas analyser kit
    • Includes Testo 327-1
    • Also comes with large amount of accessories
    541 Reward Points
    Price Match Guarantee
    0563320371
  7. FREE Testo Socket Set
    Testo 327-1 Flue Gas Analyser Standard Kit, Gas Leak Detector, & CPA1 Probe Set
    Testo logo
    Only 1 In Stock
    Free UK Delivery
    Testo 327-1 Flue Gas Analyser Standard Kit, Gas Leak Detector, & CPA1 Probe Set
    (no reviews)
    £688.50 £573.75
    • Testo Gas Leak Detector
    • CPA1 Probe Set
    • Accessories and more
    573 Reward Points
    Price Match Guarantee
    05633327
  8. FREE Testo Socket Set
    Testo 327-1 Flue Gas Analyser Advanced Kit & Gas Leak Detector
    Testo logo
    In Stock
    Free UK Delivery
    Testo 327-1 Flue Gas Analyser Advanced Kit & Gas Leak Detector
    (no reviews)
    £749.70 £624.75
    • Testo Gas Leak Detector
    • A range of accessories
    • Printer
    624 Reward Points
    Price Match Guarantee
    05632327
  9. FREE Testo Socket Set
    Testo 327-1 Flue Gas Analyser Advanced Kit, Gas Leak Detector, & CPA1 Probe Set
    Testo logo
    In Stock
    Free UK Delivery
    Testo 327-1 Flue Gas Analyser Advanced Kit, Gas Leak Detector, & CPA1 Probe Set
    (no reviews)
    £831.30 £692.75
    • Testo Gas Leak Detector
    • CPA1 Probe Set
    • Printer, accessories and more
    692 Reward Points
    Price Match Guarantee
    05634327
  10. FREE Testo Socket Set
    Testo 300 Flue Gas Analyser Standard Kit
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300 Flue Gas Analyser Standard Kit
    (no reviews)
    £916.98 £764.15
    • Includes a Testo 300 FGA with a limited-edition black casing
    • Fast-response, scratch-proof, recessed touchscreen display
    • Includes a basic flue gas probe, filters and a USB mains unit with cable
    764 Reward Points
    Price Match Guarantee
    0564300290
  11. FREE Testo Socket Set
    Testo 300 Black Edition  Flue Gas Analyser -  Advanced Kit
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300 Black Edition Flue Gas Analyser - Advanced Kit
    (no reviews)
    £998.58 £832.15
    • Includes a Testo 300
    • Advanced kit includes a basic flue gas probe, clamp probes and a carry case
    • Measure O2, flue CO, draught, pressure and temperature
    832 Reward Points
    Price Match Guarantee
    0564300291
  12. FREE Testo Socket Set
    Testo 300 Flue Gas Analyser – Smart Kit
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300 Flue Gas Analyser – Smart Kit
    (no reviews)
    £1,069.98 £891.65
    • Large, high-resolution, colour, scratch-resistant, touchscreen display
    • Wirelessly connect up to four Testo Smart Probes
    • View readings on a smartphone/tablet via the Testo Smart App
    891 Reward Points
    Price Match Guarantee
    0564300201
  13. FREE Testo Socket Set
    Testo 300 Flue Gas Analyser and 550i Manifold Smart Heat Pump Kit
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300 Flue Gas Analyser and 550i Manifold Smart Heat Pump Kit
    (no reviews)
    £1,110.78 £925.65
    • Service, maintain & install boilers, refrigeration systems; & heat pumps
    • Testo 300 Smart FGA, 550i Digital Manifold, 510i Manometer, & 2x 115i Pipe Clamps
    • Use with Testo’s free Smart App
    925 Reward Points
    Price Match Guarantee
    0564300204
  14. FREE Testo Socket Set
    Testo 300 Flue Gas Analyser – Ultra-Smart Kit
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300 Flue Gas Analyser – Ultra-Smart Kit
    (no reviews)
    £1,120.98 £934.15
    • Testo 115 and 510i Smart Probes
    • Testo Combustible Gas Leak Detector
    • A range of accessories
    934 Reward Points
    Price Match Guarantee
    0564300202
  15. FREE Testo Socket Set
    Testo 300 Flue Gas Analyser w/ NOx Sensor & Printer - Limited Black Edition
    Testo logo
    Free UK Delivery
    Testo 300 Flue Gas Analyser w/ NOx Sensor & Printer - Limited Black Edition
    (no reviews)
    £1,494.00 £1,245.00
    • Measure O₂, CO and NOx gases
    • Supplied with a Bluetooth printer and thermal paper
    • Fast-response touchscreen display
    1245 Reward Points
    Price Match Guarantee
    TESTO300NOX
  16. Free Accessory + Flue Cleaning Brushes
    Testo 300LL Long-life Flue Gas Analyser
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300LL Long-life Flue Gas Analyser
    (no reviews)
    £1,732.98 £1,444.15
    • Supplied with O₂ and CO sensors optimised for longevity
    • NO sensor can be added retrospectively
    • Available in two kits with or without a compatible Bluetooth/ IRDA printer
    1444 Reward Points
    Price Match Guarantee
    0564300482
  17. Free Accessory + Flue Cleaning Brushes
    Testo 300LL Long-life Flue Gas Analyser with Printer
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300LL Long-life Flue Gas Analyser with Printer
    (no reviews)
    £1,936.98 £1,614.15
    • Testo 300LL Long-life Flue Gas Analyser
    • Bluetooth/ IRDA Printer
    • Spare Thermal Paper with Indelible Ink
    1614 Reward Points
    Price Match Guarantee
    0564300489
  18. Free Accessory + Flue Cleaning Brushes
    Testo 300LL Long-life Flue Gas Analyser with NOx Sensor & Printer
    Testo logo
    In Stock
    Free UK Delivery
    Testo 300LL Long-life Flue Gas Analyser with NOx Sensor & Printer
    (no reviews)
    £2,242.98 £1,869.15
    • Can calculate the total NOx measurement in mg/KWh for direct comparison with specified regulations
    • Bluetooth/ IRDA Printer
    • Spare Thermal Paper with Indelible Ink
    1869 Reward Points
    Price Match Guarantee
    0564300484
  19. Free Accessory + Flue Cleaning Brushes
    Testo 340 Flue Gas Analyser – Basic Combustion Kit
    Testo logo
    Made To Order
    Free UK Delivery
    Testo 340 Flue Gas Analyser – Basic Combustion Kit
    (no reviews)
    £3,024.00 £2,520.00
    • Fitted with O₂, CO and NO sensors and an integrated Bluetooth module
    • Optimised for industrial applications and environments
    • Extended measurement range for use in environments with high gas concentrations
    2520 Reward Points
    Price Match Guarantee
    05639352
  20. Free Accessory + Flue Cleaning Brushes
    Testo 340 Flue Gas Analyser - NO₂/ NOx Kit
    Testo logo
    Made To Order
    Free UK Delivery
    Testo 340 Flue Gas Analyser - NO₂/ NOx Kit
    (no reviews)
    £3,648.00 £3,040.00
    • Suitable for inspecting industrial engines and burners
    • Equipped with O₂, CO, NO and NO₂ sensors
    • Integrated Bluetooth module allows the analyser to be operated remotely via the user’s smartphone
    3040 Reward Points
    Price Match Guarantee
    05639350
  21. Free Accessory + Flue Cleaning Brushes
    Testo 340 Flue Gas Analyser - SO₂ Kit
    Testo logo
    Made To Order
    Free UK Delivery
    Testo 340 Flue Gas Analyser - SO₂ Kit
    (no reviews)
    £3,648.00 £3,040.00
    • Fitted with O₂, CO, NO and SO₂ Sensors and an integrated Bluetooth module
    • Compact and rugged design suitable for industrial environments
    • Extended measurement range suitable for inspecting industrial engines and burners
    3040 Reward Points
    Price Match Guarantee
    05639351
  22. Free Accessory + Flue Cleaning Brushes
    Testo 340 Industrial Flue Gas Analyser – Fully Customisable
    Testo logo
    Made To Order
    Free UK Delivery
    Testo 340 Industrial Flue Gas Analyser – Fully Customisable
    (no reviews)
    Call for Pricing
    • Choose three sensors: CO, COlow, NO, NOlow, NO2, or SO2
    • Supplied with an O2 Sensor as standard
    • Supports flow and pressure difference measurements
    We require additional information before you purchase this product.
    06323340
  23. Free Accessory + Flue Cleaning Brushes
    Testo 350 Industrial Flue Gas Analyser – Fully Configurable
    Testo logo
    Made To Order
    Free UK Delivery
    Testo 350 Industrial Flue Gas Analyser – Fully Configurable
    (no reviews)
    Call for Pricing
    • Provided with an oxygen sensor (O2)
    • Choose up to five more sensors: CO, CO2, NO, NOlow, NO2, SO2, H2S, CxHy
    • Measuring range extension function for analysing high gas concentrations
    We require additional information before you purchase this product.
    06323511

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About Flue Gas Analysers & Kits

At PASS we stock a wide range of gas detection and measurement, combustion and boiler servicing accessories for GasSafe Engineers. We are authorised distributors for leading brands such as Testo, Anton, Crowcon, TPI, and Kane and are committed to helping you get the right equipment for both commercial and domestic settings.

Whether you are looking for a standalone unit with or without an LCD screen or a smart analyser that can connect with Apps, there's plenty of choice at PASS. Check out some of our kit options that include useful accessories as well as additional tools for temperature measurements, flow and return, and pressure.

Frequently Asked Questions

What gases can a flue gas analyzer detect?

They typically measure parameters such as oxygen (O2), carbon dioxide (CO2), carbon monoxide (CO), nitrogen oxides (NOx), Nitric Oxide (NO), sulfur dioxide (SO2), and sometimes other gases or particulate matter. By analysing these components, users can optimise combustion processes for efficiency, minimise emissions of pollutants, and ensure compliance with regulatory standards.

What industries commonly use flue gas analysers?

They play a vital role in industries such as heating, power generation, automotive, and environmental monitoring, helping to improve energy efficiency, reduce environmental impact and ensure appliances are safe.

What is the difference between a flue gas analyzer (FGA) and a combustion analyser?

In general, there isn't a big difference between them as they are often used interchangeably to refer to devices that measure and analyse the composition of gases produced by combustion processes. However, there can be slight differences in how these terms are used depending on context and specific applications and devices.

They generally both measure gases emitted from combustion processes, such as those from boilers, furnaces, or engines. FGA's focus on measuring parameters like oxygen, carbon dioxide, carbon monoxide, nitric oxide, nitrogen oxides, and other combustion-related gases. They are commonly used in heating, power generation, and environmental monitoring industries. Combustion analysers may offer additional features such as calculating combustion efficiency, stack draft, and performing other diagnostic functions beyond basic gas analysis.

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