1. This product was added to our catalog on Tuesday 20 November, 2018.

    Testo 310 - Flue Gas Analyser (Standard Kit)
    [0563 3100]

    Price:  £379.00


  2. Testo 310 - Flue Gas Analyser (Standard Kit)

    • Direct O2, CO, flue gas and ambient temperature measurements

    • Integrated measurement menu for flue gas, draft, CO ambient air and pressure

    • Quick sensor zero in only 30 seconds

    • Large, backlit digital display, rechargeable lithium battery with up to 10 hours life

    Being a systems mechanic you know only too well how tough things can get when you’re working out in the field. That’s why your measuring tools need to be rugged and reliable. Like the testo 310 flue gas analyzer. Designed especially for use in the field.

    Product Description

    The Testo 310 Flue Gas Analyser combines simple functions with a high level of measurement accuracy, and is perfect for all basic measurements on heating systems. Long battery lifetimes of up to 10 hours guarantee high availability. It’s easy handling and compact design make the testo 310 a robust tool for daily work – even when things get rough.

    With its capability to perform both basic or more complex combustion analysis, perform maintenance or safety checks, or confirm boiler efficiency, the fully featured testo 310 residential combustion analyser is ready to provide accurate analysis. The stainless steel probe and cone-stop is perfect for residential, and boiler efficiency applications. Simple top-of-display icons show you the current measurement functions. After only 30 seconds, the 310 is ready to test. With five different fuels to select from (Natural Gas, Propane, Fuel Oil 2%, Biomass 5%, Wood 20%), it provides the flexibility you need for all your residential combustion analysis applications.


    • O2, CO (with built-in NOx filter), CO2

    • Undiluted CO (CO air free)

    • Ambient CO

    • Draft & Pressure

    • Temperature (flue & ambient)

    • Combustion/flue gas efficiency & excess air

    Technical Data

    Temperature - TC Type K (NiCr-Ni)
    Measuring range-20 to +100 °C
    Accuracy±1 °C
    Resolution0.1 °C
    Reaction time< 50 s

    Temperature (ambient temperature)

    Temperature - TC Type J (Fe-CuNi)
    Measuring range0 to +400 °C
    Accuracy±1 °C (0 to +100 °C) ±1.5 % of mv (> 100 °C)
    Resolution0.1 °C
    Reaction time< 50 s

    Temperature (flue gas)

    Flue gas O₂
    Measuring range0 to 21 Vol.%
    Accuracy±0.2 Vol.%
    Resolution0.1 Vol.%
    Reaction time30 s

    Flue gas Draught
    Measuring range-20 to +20 hPa ±0.03 hPa (-3 to +3 hPa)
    Accuracy±1.5 % of mv (Remaining Range)
    Resolution0.01 hPa

    Flue gas degree of effectivity, Eta (calculated)
    Measuring range0 to 120 %
    Resolution0.1 %

    Flue gas loss (calculated)
    Measuring range0 to 99.0 %
    Resolution0.1 %

    Flue gas CO₂ calculation (calculated from O₂)
    Measuring range0 to CO₂ max (Display range)
    Accuracy±0.2 Vol.%
    Resolution0.1 Vol.%

    Pressure measurement
    Measuring range-40 to +40 hPa
    Accuracy±0.5 hPa
    Resolution0.1 hPa

    Flue gas CO (without H₂-compensation)
    Measuring range0 to 4000 ppm
    Accuracy±20 ppm (0 to 400 ppm) ±5 % of mv (401 to 2000 ppm) ±10 % of mv (2001 to 4000 ppm)
    Resolution1 ppm
    Reaction time< 60 s

    General technical data
    Dimensions201 x 83 x 44 mm
    Operating temperature-5 to +45 °C
    Display typeLCD
    Display function
    Power supply
    Storage temperature<-20 to +50 °C
    Weight<(with probe) Approx. 700 g

    Technical Data


    Draught measurement in the flue gas duct

    Draught measurement is actually a differential pressure measurement. This differential pressure occurs between two sub-areas as a result of a difference in temperature. This is turn generates a flow to compensate. In the case of flue gas systems, the difference in pressure is an indicator of the “chimney flue draught”. This is measured between the flue gas and ambient air at the measurement orifice at the core of the flue gas flow.
    To ensure the flue gases are safely transported through the chimney there must be a differential pressure (chimney flue draught) for boiler systems that work with low pressure.
    If the draught is permanently too high, the average flue gas temperature increases and therefore flue gas loss. The level of efficiency drops.
    If the draught is permanently too low, oxygen may be lacking during combustion, resulting in soot and carbon monoxide. This will also cause a drop in the level of efficiency.

    Ambient CO measurement in the heated environment

    Carbon monoxide (CO) is a colourless, odourless and taste-free gas, but also poisonous. It is produced during the incomplete combustion of substances containing carbon (oil, gas, and solid fuels, etc.). If CO manages to get into the bloodstream through the lungs, it combines with haemoglobin thus preventing oxygen from being transported in the blood; this in turn will result in death through suffocation. This is why it is necessary to regularly check CO emissions at the combustion points of heating systems, and places often frequented by people (in our case, where the combustion systems for hot water generation are), and in the surrounding areas.

    Measuring the flue gas parameters of the burner (CO, O2, and temperature, etc.)

    The flue gas measurement for a heating system helps to establish the pollutants released with the flue gas (e.g. carbon monoxide CO) and the heating energy lost with the warm flue gas. In some countries, flue gas measurement is a legal requirement. It primarily has two objectives:

    1. Ensuring the atmosphere is contaminated as little as possible by pollutants; and

    2. Energy is used as efficiently as possible.

    Stipulated pollutant quantities per flue gas volume and energy losses must never be exceeded.
    Measurement in terms of results required by law takes place during standard operation (every performance primarily using the appliance). Using a Lambda probe (single hole or multi-hole probe), the measurement is taken at the centre of flow in the connecting pipe (in the centre of the pipe cross-section, not at the edge) between the boiler and chimney/flue. The measured values are recorded by the flue gas analyzer and can be logged either for print out or transfer to a PC at a later stage.
    Measurement is taken by the installer at commissioning, and if necessary four weeks later by the flue gas inspector/chimney sweep, and then at regular intervals by the authorised service engineer.

    Measuring pressure on burners (nozzle pressure, gas flow pressure, etc.)

    Standard readings taken during services of domestic heating systems include checking the gas pressure on the burners. This involves measuring the gas flow pressure and gas resting pressure. The flow pressure, also called supplied pressure, refers to the gas pressure of the flowing gas and resting pressure of the static gas. If the flow pressure for gas boilers is slightly outside the 18 to 25 mbar range, adjustments must not be made and the boiler must not be put into operation. If put into operation nonetheless, the burner will not be able to function properly, and explosions will occur when setting the flame and ultimately malfunctions; the burner will therefore fail and the heating system will shut down.


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    USB mains unit incl. cable

    Delivery Scope

    testo 310 - Flue Gas Analyser, Hard case, rechargeable battery, usb mains cable, silicon hose for pressure, 5 x filters, calibration protocol, 180mm probe with cone, spare pressure plugs.

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