Testo 340 Industrial Flue Gas Analyser SO2 Kit

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  • Suitable for checking sulphur dioxide emissions from industrial combustion units
  • Also measures CO, NO, O2, temperature, draught and pressure
  • Large internal memory and Bluetooth communication for wireless data transfer
(Ex. VAT) £2,990.00 (Inc. VAT) £3,588.00

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  • Description

    Testo 340 Industrial Flue Gas Analyser SO2 Kit

    Testo 340 in use

    The Testo 340 Industrial Flue Gas Analyser SO2 Kit is ideal for measuring a range of dangerous emissions from industrial combustion systems including sulphur dioxide which is one of the main contributors to acid rain and has a negative impact on human and animal health.

    Flue Gas Measurement

    In terms of measurement features, the Testo 340 in the SO2 Kit stands out for its ability to measure SO2 from 0 to 5000ppm. This is alongside measurement of oxygen (0 to 25%), CO (0 to 10,000ppm), NO (0 to 4000ppm), temperature (-40˚C to 1200˚C, probe dependent), draught (-40hPa to 40hPa), differential pressure (-200hPa to 200hPa), and absolute pressure (600hPa to 1150hPa). CO measurement is H2-compensated and all measurements are extremely precise and accurate.

    The Testo 340 is also capable of calculating various values including flue gas loss, flue gas dew point, efficiency and CO2 level. The useful dilution feature allows the user to measure greater ranges for chemical concentration measurement (up to 25,000ppm for SO2) without placing excess strain on the sensors.

    Smart Features

    Chemical works

    The Testo 340 has a large internal memory which can save up to 200 records for up to 1000 different sites in a logical database format. The user has the choice of 13 pre-set fuel types and it is possible to add further fuels as required. Measurements are shown on the analyser’s four-line digital display and operation using the intuitive menu system is surprisingly simple.

    Bluetooth communication on the Testo 340 makes it possible to transfer information wirelessly to the free Testo Combustion App on a compatible smart device. This also allows printing of results with a Testo Bluetooth Printer and an additional IR port is available for printing with a Testo IrDA printer. Optional Testo easyEmission software provides further analysis, reporting and data transfer options.


    The Testo 340 SO2 Kit has a quick-change probe system that is compatible with a wide range of different probes. A 7.8m gas sampling hose is available as an optional extra and the compact sturdy design is ideal for industrial environments. An integrated pump system maintains gas flow in the flue and the kit is supplied with a battery charger, carry strap and a carry case.

    Testo part number: 0563 9351

    Key Features

    • Oxygen range: 0 to 25%
    • Carbon monoxide range (H2-compensated): 0 to 10,000ppm
    • Nitrogen oxide range: 0 to 4000ppm
    • Sulphur dioxide range: 0 to 500ppm
    • Dilution for NO, CO, SO2
    • Temperature range: -40˚C to 1200˚C (probe dependent)
    • Draught range: -40hPa to 40hPa
    • Differential pressure range: -200hPa to 200hPa
    • Absolute pressure range: 600hPa to 1150hPa
    • Efficiency, flue gas dew point, flue gas loss, CO2 (calculated)
    • Large internal memory
    • Compatible with wide range of probes
    • Internal gas pump
    • Two-year warranty

    Probe Options

    Please note that the Testo 340 SO2 Kit does not come with flue gas probes as standard. The three types of probe are listed below but a full breakdown is available in the Testo 340 Brochure in the Product Documents section.

    335mm or 700mm standard modular flue gas probes are available with temperature measurement ranges of 500˚C to 1000˚C, with or without dust particle filters.

    Gas sampling probes for industrial engines are particularly suited to emission control and can be fitted with a thermocouple for exhaust gas temperature measurement.

    Industrial gas sampling probes can be used when an environment or system poses various challenges such as high temperatures, high dust loads, and wet flue gas.

      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

    SO2 measurement

    • Range: 0 to 5000ppm
    • Accuracy: ±10 ppm (0 to 99 ppm); ±10% of m.v. (remaining meas. range)
    • 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

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

    SO2 measurement

    • Range: 500ppm to 25,000ppm
    • 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

    SO2 measurement

    • Range: 500ppm to 10,000ppm
    • 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 and SO2 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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