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testo 310 II Combustion Analyzer HVAC – Combustion Leak Tester for Temperature, Flue Gas & Pressure – Natural Gas Leak Detector with Smart App and Probe

  • Based on 341 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Sunday, Mar 8
Order within 5 hours and 12 minutes
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Style: App Connection


Size: Standard Set without Printer


Features

  • Efficient; Perfect for complex flue and exhaust gas analyses, the natural gas detector simplifies maintenance and safety checks on heating systems. The intuitive menu and smart app enable simultaneous measurements of key parameters
  • Wide Range; The combustion analyzer hvac measures temperature K TC and J TC , flue gas O2, flue gas draft, flue gas loss, efficiency, pressure, flue gas CO range without H2 compensation, as well as ambient CO
  • Accurate; Equipped with highly sensitive sensors, the testo 310 II gas leak detector ensures precise temperature and flue gas measurements. It delivers reliable accuracy across various ranges, providing dependable results for your analysis tasks
  • Easy Operation; The intuitive interface of the testo combustion leak tester, coupled with straightforward menus, allows professionals to perform flue gas analysis with ease, ensuring efficient and error-free diagnostics
  • Complete Set; Your testo combustion analyzer includes a rechargeable battery and calibration protocol for the measurement of O2, CO, hPa and C, probe 180 mm with cone, silicon hose for pressure measurement, 5 particle filters, and a sturdy case

Description

Testo 310 II Combustion Analyzer - Reliable testing of heating systems with the natural gas leak detector for beginners Heating fitters and technicians need a reliable measuring device for tasks like flue gas analysis during commissioning and maintenance of heating systems. The compact natural gas leak detector features a simple user interface and four integrated measurement menus: flue gas, draught, ambient CO & pressure. Thanks to the high-resolution co2 sensor display, all values are visible at a glance and can be configured. You can keep your hands free during measurement by fixing the testo 310 II to metal surfaces using the built-in magnets. Another practical feature: the testo Smart App lets you operate and configure the device remotely. Measurement results can be transferred via Bluetooth to the optional Testo quick printer or sent by e-mail for on-site printing.Technical Details 310 II:Temperature Measuring Range: -4° to 752 °F / -20 to +400 °C Flue Gas O₂ Measuring Range: 0 to 21 Vol. % Flue Gas Draft Measuring Range: -8 to +8 InH₂O / -20 to +20 hPa Pressure Measuring Range: -16 to +16 InH₂O / -40 to +40 hPa

Brand: Testo


Style: App Connection


Power Source: Battery Powered


Color: Black


Product Dimensions: 2"D x 3"W x 8"H


Item Weight: 1.5 Pounds


Alarm: Audible


Number of Items: 1


Manufacturer: Testo


Brand: ‎Testo


Style: ‎App Connection


Power Source: ‎Battery Powered


Color: ‎Black


Product Dimensions: ‎2"D x 3"W x 8"H


Item Weight: ‎1.5 Pounds


Alarm: ‎Audible


Number of Items: ‎1


Manufacturer: ‎Testo


Part Number: ‎0563 3104 01


Item Weight: ‎1.5 pounds


Item model number: ‎0563 3104 01


Batteries: ‎1 Lithium Ion batteries required. (included)


Size: ‎Standard Set without Printer


Item Package Quantity: ‎1


Measurement Accuracy: ‎±1.8 °F (32° to 212 °F) / ±1 °C (0 to +100 °C) ±1.5 % of mv (> 212 °F) / ±1.5 % of mv (> 100 °C)


Usage: ‎Professional


Included Components: ‎Instrument, case, filters, CofC


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Lithium Ion


Date First Available: December 7, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Afterpay Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Must have for servicing furnaces.
Style: No App Connection Size: Standard Set without Printer
I was able to use this to confirm a cracked heat exchanger on my old furnace. I also used it to confirm my new furnace was working correctly.
Reviewed in the United States on December 10, 2025 by RatherBeTraveling

  • Quality
Style: No App Connection Size: Standard Set without Printer
Please don't buy! I opened it right away and turned it on and gave me O2 sensor code and will not work. I called Testo and they said the O2 sensor needs to be replaced and will not cover it under warranty. I bought three and they are all the same! Don't recommend buying these!
Reviewed in the United States on January 8, 2026 by HN Plumbing, heating, electrical JC Washburn LLC

  • Easy to use, good battery life, decent display
Style: No App Connection Size: Standard Set without Printer
Works well for residential systems, able to quickly tune furnaces and boilers for optimal AFUE. I routinely get 83-86% out of standard 80% furnaces after using this tool. Make sure you know what values to look for when balancing a system, such as excess air percentages and O2/CO2/CO levels, etc. Nice to be able to take static pressures on duct work as well as temperature splits, although the temperature readings take a while to even out. Easy to use, easy to switch from propane to nat gas, only gripe is that it didn't come with the printer. Do yourself a favor and buy the kit that includes the printer. Easy to prove your readings instead of writing down values on your invoices. ... show more
Reviewed in the United States on February 16, 2018 by August

  • GREAT TESTO METER
Style: No App Connection Size: Standard Set without Printer
Can use on homeowner and commercial applications
Reviewed in the United States on December 22, 2025 by Scott Justice

  • Easy to use...Fixed my furnace issues in 10 minutes.
Style: No App Connection Size: Standard Set without Printer
Easy to use.... but $$$. But sometimes you have no choice. I got this because I was having serious problems with my Gas Furnace and after 3 attempts with professionals ($$$$$) fiddling with the Gas Control without testing the exhaust, I ordered the the Analyzer. It took me roughly 10 Minutes to read the Manual and another 10 to set the combustion correctly. Great product... ... show more
Reviewed in the United States on April 5, 2022 by John Buser

  • Dont buy used electronics
Style: No App Connection Size: Standard Set without Printer
Quit working 5 min after I turned it on. Piece of junk. I didnt realize it was used so thats my fault, but you sold me a piece of crap for $300. I tried returning it, got no reply and Testo was no help either since I didnt buy it from them.
Reviewed in the United States on November 19, 2025 by Greg Taylor

  • Testo
Solid,reliable,and affordable compared to others
Reviewed in the United States on December 19, 2024 by Bud

  • Works great
Style: No App Connection Size: Standard Set without Printer
Works great. Had to buy the printer separate because they were out of kits. Maybe splurge and buy the one compatible with the app though
Reviewed in the United States on November 7, 2024 by Amazon Customer

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