testo 330i LX - Advanced flue gas analyzer kit

Order-Nr.  0563 3000 71

  • Operation independent of measuring location, and display of readings via smartphone or tablet using the testo 330i LX app

  • Paperless documentation and report creation on site, with the testo 330i LX app

  • Reliable attachment of the flue gas probe with the testoFix probe holder

  • Robust, completely enclosed plastic housing, for use in harsh environments

The testo 330i LX advanced flue gas analyzer kit will enable you to overcome all the challenges that crop up when commissioning and servicing heating systems.  The testo 330i LX advanced kit contains the flue gas analyzer, a flue gas probe, a temperature probe, and a number of practical accessories.

Delivery time: 17 working days

Shipping costs

$ 2 435.00
excl. tax

Product Description

At the core of the innovative testo 330i LX flue gas analyzer is the measuring technology of the preceding testo 330 LL models, which have been proven in practice a thousand times over.  The outstanding technical features of this flue gas analyzer, such as its user-replaceable long life sensors, integrated draught and gas zeroing, and CO / fresh air dilution have been combined with a revolutionary new method of operation.

The first remote-controlled flue gas analyzer

Operation of the testo 330i LX flue gas analyzer and the display of its readings are implemented wirelessly via the testo 330i LX app on your smartphone or tablet.  Therefore, when making adjustments to a system, you always have the readings at hand.  In the app, you can enter customer data, make adjustments to measuring instrument settings, and add comments or photos to measurement protocols on site, and send them to your customer or your office via email.  If you need the results of your work on paper, no problem.

Requirements:  iOS 7.1 / Android 4.3 or newer.  Mobile end device with Bluetooth 4.0.

Further advantages of the testo 330i LX flue gas analyzer

  • User-replaceable long life sensors with a service life of up to 6 years.  This saves at least one sensor replacement over the instrument's typical useful life.
  • H2-compensated CO measuring cell.  The testo 330i LX is also approved for official acceptance testing of heating systems.
  • TÜV-tested according to the 1st German Federal Immission Control Ordinance (BImSchV) and EN 50379, Parts 1 - 3.
  • Integrated draught and gas zeroing, without removing the probe.  The probe can remain in the flue during zeroing.
  • Fresh air dilution upon exceeding a CO threshold value up to 30,000 ppm.

Flue gas analyzer kit with practical accessories

The testo 330i LX advanced flue gas analyzer kit includes the following probes:
  • Modular flue gas sampling probe (probe length 7.1 in.), with 25.6 in. long extra-flexible hose
  • Combustion air temperature probe, 7.5 in. long
The patent pending testoFix probe holder is included in the kit, enabling you to quickly, easily, and securely attach probes to a flue gas duct.  This global innovation also serves as a fallproof suspension system for the testo 330i LX flue gas analyzer.  A mains unit for the measuring instrument, the testo 330i LX Bluetooth, and a robust case for the measuring instrument and accessories complete this kit.


Delivery Scope

•    testo 330i LX flue gas analyzer with H2-compensated CO sensor (0632 3000 51)
•    Modular flue gas probe with hose, 25.6 in. (0600 9781)
•    International mains unit (0554 1096)
•    testoFix probe holder for probes, with a diameter of 0.3 in. (0554 3006)
•    Instrument case for testo 330i LX, probes, and accessories (20.5 × 5.1 × 15.7 in., W × H × D) (0516 3302)
General technical data


25 oz. (excluding battery) / 720 g (excluding battery)


11 x 6 x 2 in. / 270 x 160 x 57 mm

Operating temperature

23° to 113 °F / -5 to +45 °C

Power supply

Rech. batt. block 3.7 V / 2.6 Ah; Mains unit 6 V / 1.2 A (optional)

System requirements

requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0


500000 readings

Storage temperature

-4° to 122 °F / -20 to +50 °C

Differential Pressure

Measuring range

0 to 120 InH₂O / 0 to 300 hPa


±0.2 InH₂O (0.0 to +20.0 InH₂O) / ±0.5 hPa (0.0 to +50.0 hPa)

±1 % of mv (+20.0 to +40.0 InH₂O) / ±1 % of mv (+50.1 to +100.0 hPa)

±1.5 % of mv (Remaining Range)


0.0 InH₂O / 0.1 hPa

Flue gas O₂

Measuring range

0 to 21 Vol.%


±0.2 Vol.%


0.1 Vol.%

Flue gas CO

Measuring range

0 to 8000 ppm


±10 ppm or ±10 % of mv (0 to 200 ppm)

±20 ppm or ±5 % of mv (201 to 2000 ppm)

±10 % of mv (2001 to 8000 ppm)


1 ppm

CO determination (with H₂-compensation), automatic dilution

Measuring range

0 to 30000 ppm


±200 ppm or ±20 % of mv (0 to 30000 ppm)


1 ppm

Flue Gas NO

Measuring range

0 to 3000 ppm


±5 ppm (0 to 100 ppm)

±5 % of mv (101 to 2000 ppm)

±10 % of mv (2001 to 3000 ppm)


1 ppm


Flue Gas Draft

Measuring range

-4.00 to +16 InH₂O / -9.99 to +40 hPa


±0.01 InH₂O or ±5 % of mv (-0.20 to +0.24 InH₂O) / ±0.02 hPa or ±5 % of mv (-0.50 to +0.60 hPa)

±0.01 InH₂O (+0.24 to +1.20 InH₂O) / ±0.03 hPa (+0.61 to +3.00 hPa)

±1.5 % of mv (1.20 to +16.00 InH₂O) (the greater value applies) / ±1.5 % of mv (3.01 to +40.00 hPa) (the greater value applies)


0.00 InH₂O / 0.01 hPa


Measuring range

-40° to 2192 °F / -40 to +1200 °C


±0.9 °F (32.0° to 212.0 °F) / ±0.5 °C (0.0 to +100.0 °C)

±0.5 % of mv (Remaining Range)


0.1 °F (-40° to 1831.8 °F) / 0.1 °C (-40 to +999.9 °C)

±1 °F (Remaining Range) / 1 °C (Remaining Range)

dependent on the thermocouple

Efficiency (calculated)

Measuring range

0 to 120 %


0.1 %

Flue Gas loss (calculated)

Measuring range

0 to 99.9 %


0.1 %

Flue Gas CO₂ calculation (calculated from O₂)

Measuring range

Display range 0 to CO₂ max


±0.2 Vol.%


0.1 Vol.%


$ 115.00
excl. tax
$ 188.00
excl. tax
USB connection cable

Order Number: 0449 0047

$ 890.00
excl. tax
Particle filters - pack of 10

Order Number: 0554 3385

Differential pressure measurement

You can use the testo 330i flue gas analyzer to check the gas supply on gas boilers. You can therefore measure gas flow pressure and gas resting pressure in order to ensure that the system can be commissioned. You can also use the data specified by the manufacturer for the nozzle pressure to tailor the appliance output to the heat requirement.

Flue gas analysis and flue gas measurement

The testo 330i is equipped with two long-life sensors for measuring O2 and CO and can optionally be upgraded with an NO sensor. Flue gas and draught are measured in parallel, so all relevant flue gas parameters are displayed simultaneously on the smartphone.

O2 supply air measurement

In balanced flue systems, you can use the testo 330i flue gas analyzer to check whether there is a leak in the flue gas system. Measure the O2 content of the combustion air in the dual wall clearance to ensure that no flue gas is getting into the combustion air supply, thus preventing damage due to condensate or impairment of the combustion process.

Product Brochures



  • Update-Kit / Bootloader  (V1.22, EXE, 381 KB) Download this file if you are using Microsoft Windows 8 or 10.  Firmware cannot be installed if this Update Kit file is not activated.
    This applies to Testo models 320, 330, 330i, 350)  See Installation Instructions PDF prior to installation.