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Testo 300 LL Long-life Flue Gas Analyser - Standard Kit

Testo
SKU: TESTO300LL
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Key Features
  • Touchscreen-operated flue gas analyser with intuitive menus and instant reporting
  • Measures key variables including temperature, pressure, O2, and CO
  • Customisable display with real time graphics and readings
  • Learn about Testo cost of ownership & calibration

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Flue Gas Analysers & Kits Testo Promotions
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PROMO PRICE + FREE 1st YEAR RE-CALIBRATION + FREE GIFT with any Testo 300 & 327-1 Flue Gas Analyser
HEATING SEASON JUST GOT BETTER | Offer ends 31st December 2026
>> View the full promotion here <<

Testo 300 LL Longlife Flue Gas Analyser - Commercial Application Model

The Testo 300 LL Flue Gas Analyser is a highly sophisticated piece of kit designed for testing and commissioning commercial boilers and other combustion systems. It boasts a huge range of different measurement and calculation functions which makes it suitable for a wide array of applications.

The Testo 300 LL can measure O2 (0 to 21%), CO (0 to 4000ppm), NO (optional, can be retrofitted; 0 to 3000ppm), draught (-9.99mbar to 40mbar), pressure (-100mbar to 200mbar), and temperature (-40˚C to 1200˚C). The CO measurement function is particularly advanced as it has an H2-compensated sensor which, with dilution, gives a measurement range of 0 to 30,000ppm. Additionally, the analyser can measure ambient carbon monoxide with an internal sensor (0 to 2000ppm) or external probe (0 to 500ppm). In terms of value calculation, the analyser offers figures for CO2 (0 to CO2 max.), efficiency (Eta; 0 to 120%), flue gas loss (0 to 99.9%) and combustion ratio.

The advanced interface of the Testo 300 LL makes it extremely easy to use before, during, and after inspections. Live readings are shown in list form on the analyser’s 5” colour touchscreen or in graphical format over time with the settings fully customisable for the user. Operation is conducted via intuitive menus that allow fast, efficient testing. It is also possible to save up to one million results to the internal memory alongside a full address book with details of the combustion systems at the client’s premises.

The user can produce instant analysis and reports from the Testo 300 LL and then send those via e-mail using the wireless WLAN connection. PDFs can even be stored in the memory as a backup and Testo interface technology allows the analyser to work with a wide range of different software packages.

Despite its highly advanced technology, the Testo 300 LL has retained the rugged construction of other Testo flue gas analysers. The scratch-resistant touchscreen is set back in the body and covered by a protective film whilst the bolted body is highly resistant to impacts. Strong magnets on the rear of the analyser mean it can be securely placed on a metal surface during work.

The Testo flexible probe matrix means that the Testo 300 LL can be used for a very diverse range of applications. The probes from previous models such as the Testo 320 and 330 can be used with the analyser and the supplied modular flue probe handle is compatible with a wide range of different flue probes. The instrument and sensors are covered by a four-year warranty.

Testo Smart App Compatible

One app for all Bluetooth®-enabled Testo measuring instruments.

✅ Effortlessly Configure Testo Instruments
✅ Real-Time Data Display
✅ Access Data Anywhere & Anytime
✅ Customer & Site Project Management
✅ Professional Test Results Documentation
✅ Instant Report Sharing

Download today and make every measurement count (available on Android & iOS).

The app is FREE to download and includes lifetime extensions and updates.

Testo 300LL Comparison table

  Testo 300LL Testo 300LLNO Testo 300LL Printerkit
Testo 300 Testo 300LL Flue Gas Analyser Testo 300LL NOx Flue Gas Analyser Testo 300LL Flue Gas Analyser
Modular Flue Gas Probe (180mm x ø8mm) ✔ ✔ ✔
NOx Sensor fitted   ✔  
10 x spare flue probe filters ✔ ✔ ✔
Testo wireless printer   ✔ ✔
6 x printer rolls   ✔ ✔
Testo EasyHeat PC software ✔ ✔ ✔
AC Charger Unit   ✔ ✔
Carry Case ✔ ✔ ✔

Key Features

  • O2 measurement: 0 to 21%
  • CO measurement: 0 to 30,000ppm (with H2 compensation and dilution)
  • Draught measurement: -9.99mbar to 40mbar
  • Pressure measurement: -100mbar to 200mbar
  • Ambient CO measurement: 0 to 2000ppm
  • Temperature measurement: -40˚C to 1200˚C
  • NO measurement (optional): 0 to 3000ppm
  • Calculation: CO2, efficiency, combustion ration & flue loss
  • Sophisticated touchscreen interface
  • Intuitive menus and results display
  • Instantly produce reports and analysis
  • Wireless distribution over a WLAN connection
  • Sturdy construction

Testo part number: 0564 3004 82

All you need to know about servicing and calibration for this analyser

At Test Meter, we understand that choosing a new Flue Gas Analyser is not only about the cost of the analyser, but also about the cost and practicality for annual calibration and service. We've put together a useful guide that highlights all you need to know about calibration of this analyser with cost of ownership, locations of service centres in the UK and much more.

Click here to read about servicing and calibration for Testo analysers.

Testo 300 LL Smart Flue Gas Analyser - Commercial Application Model

The Testo 300 LL Smart Flue Gas Analyser is a highly sophisticated piece of kit designed for testing and commissioning commercial boilers and other combustion systems. It boasts a huge range of different measurement and calculation functions which makes it suitable for a wide array of applications.

The Testo 300 LL can measure O2 (0 to 21%), CO (0 to 4000ppm), NO (optional, can be retrofitted; 0 to 3000ppm), draught (-9.99mbar to 40mbar), pressure (-100mbar to 200mbar), and temperature (-40˚C to 1200˚C). The CO measurement function is particularly advanced as it has an H2-compensated sensor which, with dilution, gives a measurement range of 0 to 30,000ppm. Additionally, the analyser can measure ambient carbon monoxide with an internal sensor (0 to 2000ppm) or external probe (0 to 500ppm). In terms of value calculation, the analyser offers figures for CO2 (0 to CO2 max.), efficiency (Eta; 0 to 120%), flue gas loss (0 to 99.9%) and combustion ratio.

The advanced interface of the Testo 300 LL makes it extremely easy to use before, during, and after inspections. Live readings are shown in list form on the analyser’s 5” colour touchscreen or in graphical format over time with the settings fully customisable for the user. Operation is conducted via intuitive menus that allow fast, efficient testing. It is also possible to save up to one million results to the internal memory alongside a full address book with details of the combustion systems at the clients’ premises.

The user can produce instant analysis and reports from the Testo 300 LL and then send those on via e-mail using the wireless WLAN connection. PDFs can even be stored to the memory as a back up and Testo interface technology allows the analyser to work with a wide range of different software packages.

Despite its highly advanced technology, the Testo 300 LL has retained the rugged construction of other Testo flue gas analysers. The scratch-resistant touchscreen is set back in the body and covered by a protective film whilst the bolted body is highly resistant to impacts. Strong magnets on the rear of the analyser mean it can be securely placed on a metal surface during work.

The Testo flexible probe matrix means that the Testo 300 LL can be used for a very diverse range of applications. The probes from previous models such as the Testo 320 and 330 can be used with the analyser and the supplied modular flue probe handle is compatible with a wide range of different flue probes. The instrument and sensors are covered by a four-year warranty.

Testo part number: 0564 3004 82 / 0564 3004 83

 

 

Key Features

  • O2 measurement: 0 to 21%
  • CO measurement: 0 to 30,000ppm (with H2 compensation and dilution)
  • Draught measurement: -9.99mbar to 40mbar
  • Pressure measurement: -100mbar to 200mbar
  • Ambient CO measurement: 0 to 2000ppm
  • Temperature measurement: -40˚C to 1200˚C
  • NO measurement (optional): 0 to 3000ppm
  • Calculation: CO2, efficiency, combustion ration & flue loss
  • Sophisticated touchscreen interface
  • Intuitive menus and results display
  • Instantly produce reports and analysis
  • Wireless distribution over WLAN connection
  • Sturdy construction
  • Four-year warranty

Videos

  Standard Kit Printer Kit
Testo 300 LL Flue Gas Analyser ✔ ✔
Modular flue gas probe (180mm x ø8mm) ✔ ✔
10 x spare fure probe filters ✔ ✔
Testo wireless printer   ✔
6 x printer rolls   ✔
Testo EasyHeat PC software ✔ ✔
Instrument case ✔ ✔

 

Testo 300 LL Standard Kit (0564 3004 82)

  • Testo 300 LL Flue Gas Analyser
  • Modular flue gas probe (180mm x ø8mm)
  • 10 x spare flue probe filters
  • Testo EasyHeat PC software
  • Carry case

What's In The Box?

The Testo 300 LL Standard Kit includes:

  • Testo 300 LL Flue Gas Analyser
  • Modular flue gas probe (180mm x ø8mm)
  • 10 x spare flue probe filters
  • Testo EasyHeat PC software
  • Carry case
Specification
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Specification
Yes

O2 measurement

  • Range: 0 to 21%
  • Accuracy: ±0.2% vol
  • Resolution: 0.1% vol

CO measurement (without H2 compensation)

  • Range: 0 to 4000ppm
  • Accuracy: ±20 ppm (0 to 400 ppm); ±5% of m.v. (401 to 2,000 ppm); ±10% of m.v. (2001 to 4,000 ppm)
  • Resolution: 1ppm

CO measurement (with H2 compensation)

  • Range: 0 to 8000ppm
  • 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 8,000 ppm) 
  • Resolution: 1ppm

CO measurement (with H2 compensation and dilution)

  • Range: 0 to 30,000ppm
  • Accuracy: ±100ppm or ±10% of m.v.
  • Resolution: 1ppm

Combustion ratio (calculated)

  • Resolution: 0.0001

NO measurement (optional upgrade)

  • Range: 0 to 3200ppm
  • Accuracy: ±5 ppm (0 to 100 ppm); ±5% of m.v. (101 to 2,000 ppm); ±10% of m.v. (2,001 to 3,000 ppm) 
  • Resolution: 1ppm

Efficiency testing

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

Flue gas loss

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

CO2 determination

  • Range: 0 to CO2 max.
  • Accuracy: ±0.2% vol
  • Resolution: 0.1% vol

Draught measurement

  • Range: -9.99 to +40mbar
  • Accuracy: ±0.005 mbar (0 to 0.1 mbar); ±0.02 mbar (0.1 to +3.00 mbar); ±1.5% of m.v. (+3.01 to +40 mbar)
  • Resolution: 0.001mbar (0 to 0.1mbar); 0.01mbar (rest of range)

Pressure measurement

  • Range: -100mbar to +200mbar
  • Accuracy: ±0.5 mbar (0 to +50.0 mbar); ±1% of m.v. (+50.1 to +100.0 mbar); ±1.5% of m.v. (+100.1 to +200 mbar)
  • Resolution: 0.01mbar

Temperature

  • Range: -40˚C to 1200˚C
  • Accuracy: ±0.5°C (0.0 to +100.0°C); ±0.5% of m.v. (remaining meas. range)
  • Resolution: 0.1°C (-40 to +999.9°C); 1°C (remaining meas. range)

Ambient CO measurement (internal/flue gas probe)

  • Range: 0 to 2000ppm
  • Accuracy: ±10 ppm (0 to 100 ppm); ±10% of m.v. (101 to 2,000 ppm)
  • Resolution: 1ppm

Ambient CO measurement (external CO probe)

  • Range: 0 to 500ppm
  • Accuracy: ±3 ppm (0 to 29 ppm); ±10% of m.v. (30 to 500 ppm)
  • Resolution: 1ppm
  • Certification: The testo 300 is TÜV-tested according to 1st German Federal Immission Control Ordinance (BImSchV) EN 50379, Parts 1-3 
  • Storage temperature: -20˚C to 50˚C
  • Operating temperature: -5˚C to 45˚C
  • Charging temperature: 0 to 45˚C
  • Humidity application range: 15% to 90% RH
  • Power supply: Rechargeable battery, USB mains unit
  • Rechargeable battery life: 10 hours
  • Protection class: IP40
  • Memory: 1 million measurement values
  • Display: 5” touch display HD 1280 x 720 pixels, IPS (160k)
  • Weight: Approx. 800g
  • Dimensions: 244mm x 59mm x 98mm
  • Warranty: Four years
Reviews
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Kit Options

Testo 300 LL Long-life NOx Flue Gas Analyser - Printer Kit
Kit Option
£1,747.24 (ex VAT)
£2,096.69 (inc VAT)
In Stock - Available Next Day

Kit

1 x Testo 300 LL Long-life Flue Gas Analyser - Standard Kit

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Testo 300 LL Long-life Flue Gas Analyser - Printer Kit
Kit Option
£1,488.84 (ex VAT)
£1,786.61 (inc VAT)
In Stock - Available Next Day

Kit

1 x Testo 300 LL Long-life Flue Gas Analyser - Standard Kit

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£1,595.09 (Inc. VAT) £1,329.24 (Ex. VAT)