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Testo 340 Industrial Flue Gas Analyser Basic Combustion Kit

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  • Suitable for industrial applications such as emission control
  • Measurement of O2, NO, CO, temperature, draught, and pressure
  • Calculates CO2, efficiency, flue gas loss, and flue gas dew point
(Ex. VAT) £2,290.00 (Inc. VAT) £2,748.00

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  • Description

    Testo 340 Industrial Flue Gas Analyser Basic Combustion Kit

    Testo 340 in use

    The Testo 340 Industrial Flue Gas Analyser Basic Kit is a versatile solution for those working on industrial combustion systems. This includes applications in industrial emission control, servicing and maintenance of burners and combustion plants, fine tuning work on stationary industrial engines and much more.

    Flue Gas Measurement

    The Testo 340 Flue Gas Analyser is capable of measuring many different combustion-related parameters. These include oxygen (0 to 25%), carbon monoxide (0 to 10,000ppm), nitrogen oxide (0 to 4000ppm), temperature (-40˚C to 1200˚C), draught (-40 to 40hPa), differential pressure (-200 to 200hPa), and absolute pressure (±10hPa). In the basic combustion kit, it comes with O2, NO, and CO sensors as standard.

    Various calculated values can also be provided by the Testo 340. These include efficiency (0 to 120%), flue gas loss (0 to 99.9%), and flue gas dew point (0 to 99.9˚C). Carbon dioxide from 0 to CO2 max can also be derived from O2 measurements. Measured and calculated values are highly accurate and boast a high degree of precision. Furthermore, a dilution function vastly extends chemical concentration measurement ranges without placing excess stress on the sensors.

    Smart Features


    Measurements can be shown on the Testo 340’s four-line digital display and it has analysis capabilities for 13 different fuel types (additional fuels can be added as required). Readings can be saved in a logical database with room for 1000 separate locations and 200 records per measurement location.

    Saved readings can then be transferred to the free Testo Combustion App on an Android smartphone or tablet via Bluetooth. This app allows the user to exercise remote control over the analyser, send and save measurement protocols, display measurement data in graphical and tabular formats, and print out results on a Testo Bluetooth printer.

    The Testo 340 itself also has an infrared port that works directly with Testo IrDA printers and it is also compatible with optional Testo easyEmission software that offers multiple reporting, storage and analytical capabilities.


    The Testo 340 Basic Combustion Kit has a range of practical features that makes the flue gas analyser easy to use. The probe connection system makes it very easy to rapidly switch between probes in the field and an indestructible 7.8m gas sampling hose is available as an optional extra.

    The analyser is compact and rugged – ideal for tough environments – it even has an automatic integrated gas pump that keeps pump flow constant when faced with problematic over pressure or negative pressure. The kit comes supplied with a battery charger, carry strap and carry case.

    Testo part number: 0563 9352

    Key Features

    • O2 range: 0 to 25%
    • CO range (H2-compensated): 0 to 10,000ppm
    • NO range: 0 to 4000ppm
    • Dilution available for CO and NO
    • Temperature measurement (probe dependent)
    • Draught measurement: -40 to 40hPa
    • Differential pressure: -200 to 200hPa
    • Absolute pressure: 600 to 1150hPa
    • Calculation of efficiency, flue gas loss, flue gas dew point, CO2
    • Suitable for multiple industrial applications
    • Bluetooth connectivity to Testo Combustion App
    • Large onboard memory
    • Interchangeable probe system
    • Two-year warranty

    Probe Options

    The Testo 340 is compatible with three different types of probe, although no probes are supplied as standard in the basic combustion kit. Firstly, there are 335mm or 700mm standard modular flue gas probes with temperature measurement ranges of between 500˚C and 1000˚C, with or without particle filters for dusty flue gas 

    Gas sampling probes for industrial engines are particularly suited to servicing, analysis and emission control on stationary gas and diesel engines. These probes can be fitted with an additional thermocouple sensor that allows measurement of exhaust gas temperature alongside analysis.

    Finally, industrial gas sampling probes are suitable for measurements that involve extremely high temperatures, high dust loads, or wet flue gas. Other accessories can be added to improve the capabilities of these probes. Please refer to the Testo 340 Brochure in the product documents section to see a full list of compatible probes.

      Basic NOx/NO2 SO2
    O2 0-25% 0-25% 0-25%
    CO 0-10,000ppm 0-10,000ppm 0-10,000ppm
    NO 0-4000ppm 0-4000ppm 0-4000ppm
    NO2 0-500ppm
    SO2 0-5000ppm
    Temperature -40˚C to 1200˚C -40˚C to 1200˚C -40˚C to 1200˚C
    Draught -40 to 40hPa -40 to 40hPa -40 to 40hPa
    Differential pressure -200 to 200hPa -200 to 200hPa -200 to 200hPa
    Absolute pressure 600 to 1150hPa 600 to 1150hPa 600 to 1150hPa
    Efficiency 0 to 120% 0 to 120% 0 to 120%
    Flue gas loss 0 to 99.9% 0 to 99.9% 0 to 99.9%
    Flue gas dew point 0˚C to 99.9˚C 0˚C to 99.9˚C 0˚C to 99.9˚C
    CO2 0 to CO2 max 0 to CO2 max 0 to CO2 max
  • Specification


    Oxygen Measurement

    • Range: 0 to 25%
    • Accuracy: ±0.2 vol.%
    • Resolution: 0.01 vol.%
    • Adjustment time: <20s

    CO measurement (H2-compensated)

    • Range: 0 to 10,000ppm
    • Accuracy: ±10 ppm or ±10% of m.v. (0 to 200 ppm); ±20 ppm or ±5% of m.v. (201 to 2,000 ppm); ±10% of m.v. (2,001 to 10,000 ppm)
    • Resolution: 1ppm
    • Adjustment time: <40s

    NO measurement

    • Range: 0 to 4,000ppm
    • Accuracy: ±5 ppm (0 to 99 ppm); ±5% of m.v. (100 to 1,999 ppm); ±10% of m.v. (2,000 to 4,000 ppm)
    • Resolution: 1ppm

    Temperature measurement (probe dependent)

    • Range: -40˚C to 1200˚C
    • Accuracy: ±0.5 °C (0 to +99 °C); ±0.5% of m.v. (remaining meas. range)
    • Resolution: 0.1˚C

    Draught measurement

    • Range: -40 to 40hPa
    • Accuracy: ±0.03 hPa (-2.99 to +2.99 hPa); ±1.5% of m.v. (remaining meas. range)
    • Resolution: 0.01hPa

    Differential pressure measurement

    • Range: -200 to 200hPa
    • Accuracy: ±0.5 hPa (-49.9 to 49.9 hPa); ±1.5% of m.v. (remaining meas. range)
    • Resolution: 0.1hPa

    Absolute pressure measurement

    • Range: 600 to 1,150hPa
    • Accuracy: ±10hPa
    • Resolution: 1hPa

    Efficiency calculation

    • Range: 0 to 120%
    • Resolution: 0.1%

    Flue gas loss calculation

    • Range: 0 to 99.9%
    • Resolution: 0.1%

    Flue gas dew point calculation

    • Range: 0 to 99.9˚C
    • Resolution: 0.1˚C

    CO2 determination

    • Range: 0 to CO2 max.
    • Accuracy: ±0.2 vol.%
    • Resolution: 0.1 vol.%
    • Response time: <40s

    Single dilution factor 5 (standard)

    CO measurement (H2-compensated)

    • Range: 700ppm to 50,000ppm
    • Accuracy: ±10%
    • Resolution: 1ppm

    NO measurement (H2-compensated)

    • Range: 500ppm to 20,000ppm
    • Accuracy: ±10%
    • Resolution: 1ppm

    Dilution of all sensors, factor 2 (standard)

    O2 measurement

    • Range: 0 to 25%
    • Accuracy: ±1 vol.% additional error (0 to 4.99 vol.%); ±0.5 vol.% additional error (5 to 25 vol.%)
    • Resolution: 0.01 vol.%

    CO measurement (H2-compensated)

    • Range: 700ppm to 20,000ppm
    • Accuracy: ±10%
    • Resolution: 0.01 vol.%

    NO measurement

    • Range: 500ppm to 8,000ppm
    • Accuracy: ±10%
    • Resolution: 1ppm


    • 100 folders
    • Max. 10 measuring locations
    • Max. 200 records
    • The max. number of records is determined by the number of folders or sites.

    User-defined fuels

    • 13 selectable fuels, plus option for customer selected fuels to be added

    Regulated diaphragm pump

    • Pump flow: 0.6l/min (regulated)
    • Hose length: Max 7.8m (corresponds to two probe hose extensions)
    • Max. overpressure of flue gas: 50mbar
    • Max negative pressure of flue gas: -200mbar
    • General: 960g
    • Dimensions: 283mm x 103mm x 65mm
    • Storage temperature: -20˚C to 50˚C
    • Operating temperature: -5˚C to 50˚C
    • Display: Graphic display, 160 x 240 pixels
    • Power supply: Rech. batt. block 3.7 V / 2.4 Ah; Mains unit 6.3 V / 2 A
    • Housing material: TPE PC
    • Protection class: IP40


    • Measuring instrument: 2 years
    • Gas sensors: CO, NO: 1 year O2: 1.5 years
    • Pumps: 0.5 years
    • Solenoid values: 0.5 years
    • Thermocouples: 1 year
    • Rechargeable batteries: 1 year
    • Probes: 2 years


    • Accuracy checked for O2, CO2, CO, NO, NOlow, °C, hPa in accordance with the standard EN 50379 Part 2.
  • Supplied Accessories

    • Testo 340 Flue Gas Analyser with O2, CO, NO cells and Bluetooth module fitted
    • Testo 340 carry case
    • Switching power supply 6, 3VDC 2A
    • Carry strap
  • Product Documents

    Product Attachments

    View FileTesto 340 Brochure    Size: (7.41 MB)
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