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Testo 300+ Flue Gas Analyser – Choice of Kit

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Testo-300+
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Testo 300+ Flue Gas Analyser
Testo Organiser 10/24

Testo 300+ Flue Gas Analyser

The Testo 300+ Flue Gas Analyser is a comprehensive combustion analyser capable of measuring all the parameters required for domestic boiler checks and services. It is compatible with Testo’s 510i, 115i, and 915i Smart Probes, enabling additional tests, and wirelessly connects with Testo’s Smart App for documenting data, as well as creating and sending reports on-site. Available with an optional NO sensor, the Testo 300+ is perfect for domestic and commercial gas/HVAC engineers.Testo 300+ Flue Gas Analyser with labels highlighting upgraded sensors; wireless smart probe measurements; improved sensor longevity; second screen function.

Flue Gas Measurements

Fitted with electrochemical sensors, as standard the Testo 300+ can measure:

  • O2
  • CO with H2 compensation
  • COlow with H2 compensation
  • Efficiency
  • Flue gas loss
  • CO2 (calculated from O2)
  • Draught
  • Pressure
  • Temperature

When used with a flue gas probe or CO probe, the 300+ can also determine internal and external ambient CO. Additionally, the Testo 300+ may be fitted with an NO sensor, either at the point of purchase or retrospectively, thereby facilitating NO and NOlow measurement.

All readings are indicated on the flue gas analyser’s large touchscreen display. Every data value is visible without the need for scrolling. Furthermore, the Testop 300+ guides gas engineers through pre-saved menus for the most important tests. This intuitive menu combined with the FGA’s fast-response smart-touch display ensures it is easy to operate and ready to use at the touch of a button.

Testo Smart Probes

Wireless Bluetooth connectivity means the Testo 300+ can be used with Testo Smart Probes to measure up to four additional parameters in parallel with flue gas analysis. Results are automatically indicated on the Testo 300+’s display.

Testo 510i Differential Pressure Meter

Use the Testo 300+ with the 510i Smart Probe to determine differential pressure, gas flow, or static pressure.

Testo 115i Clamp Thermometer

When two Testo 115i Smart Probes are used in conjunction with the Testo 300+ Flue Gas Analyser, gas engineers can measure flow and return temperature.

Testo 915i Thermometer Smart Probe

Gas engineers can conveniently and quickly ascertain combustion air temperature with the Testo 915i Smart Probe and Testo 300+ FGA.

Testo Smart App

In addition to Testo Smart Probes, the 300+ is compatible with the Testo Smart App. Gas Engineers with the Testo Smart App installed on their smartphone or tablet can use their smart device as a second display, allowing them to leave the Testo 300+ in situ while they view data from a convenient distance. Additionally, reports may be created and sent via email using the Testo Smart App.

Robust, Ergonomic Design

The Testo 300+ is TϋV-tested to EN50379, part 1 and 3. It is housed in a robust plastic casing and has a scratch-resistant screen, ensuring it can withstand the vigors of daily use. A magnetic holder enables hands-free operation while efficient probe changes maximise productivity.

Testo 300+ Kits

The Testo 300+ is available individually or as part of four kits. The table below outlines the contents of each option.

Kit Handset Only Standard Advanced  Smart  Ultra-Smart 
Testo 300+ Flue Gas Analyser
USB Bluetooth Adapter
Calibration Protocol
Compact Flue Gas Probe (180mm Ø6mm) -
Soft Case -
2x NTC Clamp Probes - - - -
Pressure connection Kit with 2x Silicone Hoses - - - -
2x Testo 115i Clamp Thermometer  - - -
1x Testo 510i Differential Pressure Meter  - - -
1x Gas Leak Detector - - - -

The Testo 300+ Flue Gas Analyser is an ergonomic, easy-to-use, efficient combustion analyser with an eclectic variety of measurement capabilities.

Key Features

  • A comprehensive combustion analyser suitable for domestic boiler checks and services
  • Can be fitted with an NO sensor for checking commercial boilers
  • O2
  • CO with H2 compensation
  • COlow with H2 compensation
  • Efficiency
  • Flue gas loss
  • CO2 (calculated from O2)
  • Draught
  • Pressure
  • Temperature
  • Internal ambient CO using a flue gas probe
  • External ambient CO using a CO probe
  • NO and NOlow (when fitted with an NO sensor)
  • NO sensor can be fitted retrospectively
  • Large touchscreen display
  • View all readings without scrolling
  • Guides users through pre-saved menus for the most important tests
  • Wireless Bluetooth connectivity
  • Connect to Testo Smart Probes to measure up to four additional parameters in parallel with flue analysis
  • Compatible with the Testo 510i, 115i, and 915i Smart Probes
  • Compatible with the Testo Smart App
  • Use a tablet or smartphone with the Testo Smart App installed as a second display
  • Create and send reports on-site via the Testo Smart App
  • TϋV-tested to EN50379, part 1 and 3
  • Robust plastic casing
  • Scratch-resistant screen
  • Magnetic holder
  • Efficient probe changes
  • An ergonomic, easy-to-use, efficient combustion analyser

What’s Included?

  • Your Choice of Testo 300+ Flue Gas Analyser Kit
Kit Handset Only Standard Advanced  Smart  Ultra-Smart 
Testo 300+ Flue Gas Analyser
USB Bluetooth Adapter
Calibration Protocol
Compact Flue Gas Probe (180mm Ø6mm) -
Soft Case -
2x NTC Clamp Probes - -
Pressure connection Kit with 2x Silicone Hoses - -
2x Testo 115i Clamp Thermometer  - - -
1x Testo 510i Differential Pressure Meter  - - -
1x Gas Leak Detector - - - -
Testo Organiser 10/24

Get a Free Testo Heavy Duty Organiser with your purchase to securely store and organise your tools. This durable organiser keeps everything easily accessible and well-protected.

Free Pipe Cutters & Brushes or Torch Set
  • 15mm + 22mm AutoCut Pipe Cutters & Flue Cleaning Brush Set - FGAPROMO2, typically £31.98
  • Extendable Flash Light & LED Head Torch - FGAPROMO1, typically £35.98

Testo 300+ Flue Gas Analyser Technical Specifications 

Measurement parameter Measuring
range
Accuracy (±1 digit) Solution
O2 measurement 0 to 21 vol.% ±0.2 vol.% 0.1 vol.%
CO measurement
(with H2 compensation)
0 to 8,000 ppm ±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)
1 ppm
CO measurement
(with H2 compensation and
dilution)
0 to 30,000 ppm ±100 ppm or ± 10% of m.v. 1 ppm
COlow measurement
(with H2 compensation)
0 to 500 ppm ±2 ppm (0 to 40 ppm)
±5% of m.v. (remaining measuring range)
0.1 ppm
NO measurement 0 to 3,000 ppm ±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)
1 ppm
NOlow measurement 0 to 300 ppm ±2 ppm (0 to 39.9 ppm)
±5% of m.v. (40 to 300 ppm)
0.1 ppm
Efficiency testing (Eta) 0 to 120% 0.1%
Flue gas loss 0 to 99.9% 0.1%
CO2 determination
(digital calculation from O2)
Display range
0 to CO2 max.
±0.2 vol.% 0.1 vol.%
Draught measurement -9.99 to +40 hPa ±0.005 hPa (0 to 0.1 hPa)
±0.02 hPa (0.1 to +3.00 hPa)
±1.5% of m.v. (+3.01 to +40 hPa)
0.001 hPa (0 to 0.1 hPa)
0.01 hPa (remaining meas.
range)
4 Pa measurement
(for instruments with dilution)
-50 to +50 Pa ±0.3 Pa (< 10 Pa)
±3% of m.v. (remaining measuring range)
0.1 Pa
Pressure measurement -100 to +200 hPa ±0.5 hPa (0 to +50.0 hPa)
±1 % of m.v. (+50.1 to +100.0 hPa)
±1.5% of m.v. (+100.1 to +200 hPa)
0.01 hPa
Temperature (instrument) -40 to +1200 °C ±0.5 °C (0.0 to +100.0 °C)
±0.5% of m.v. (remaining measuring range)
0.1°C (-40 to +999.9°C)
1 °C (remaining measuring
range)
Ambient CO measurement
(internal/flue gas probe)
0 to 2,000 ppm ±10 ppm (0 to 100 ppm)
±10% of m.v. (101 to 2,000 ppm)
1 ppm
Ambient CO measurement
(external with CO probe)
0 to 500 ppm ±3 ppm (0 to 29 ppm)
±10% of m.v. (30 to 500 ppm)
1 ppm
General Technical Data 
Certification The testo 300 is TÜV-tested according to 1st German Federal Immission Control Ordinance (BImSchV) EN 50379, Parts 1-3
Storage temperature -20 to +50 °C
Operating temperature -5 to +45 °C
Charging temperature 0 to +45 °C
Humidity application range 15 to 90 %RH, non-condensing
Power supply Rechargeable battery, USB mains unit
Rechargeable battery life 10 h
Protection class IP 40
System requirements Requires iOS 11.0 or newer, Android 6.0 or newer, mobile device with Bluetooth 4.0
Wireless range Up to 100m with no obstructions
Testo BT Connector Interface for connecting testo Smart Probes to the measuring instrument
Memory 1 million measuring values
Display 5.0" touch display, HD 1280*720 pixels, IPS (160 k)
Weight Approx. 800 g
Dimensions L: 244 mm (including probe connection) H: 59 mm W: 98 mm
testo 300+ warranty Instrument/probe/gas sensors
O2, CO sensor 60 months
Thermocouple and rechargeable battery 12 months

Testo 300+ Flue Gas Analyser - Datasheet Datasheets

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Additional Information
SKU Testo-300+