Easy probe shaft change via quick-change click system

Reliable Dirt Protection -&nbsp;Effectively shields your probe from contamination caused by dirt and dust particles.

Battery cover used for the testo 510 Pressure Gauge

The clear cap allows you to see if condensation is building up inside the probe

Suitable for a wide range of Testo flue gas probes

Usable on wide range of Testo flue gas probes

Can be used in conjunction with hoses (0554 1203) and all Testo Flue Gas Analysers that have a bayonet socket.

With this kit, you will be equipped for the most important measurements involving domestic heating systems: the testo 300 flue gas analyzer is supplied with O2 and CO sensor up to 4,000 ppm, basic flue gas probe, pressure test accesory kit, 2 x pipe temperature clamp probes,testo Bluetooth&reg; Connector, instrument carry case, AC USB power supply.

With this kit, you will be equipped for the most important measurements involving domestic heating systems: the testo 300 flue gas analyzer is supplied with O2 and CO sensor up to 4,000 ppm, basic flue gas probe, testo Bluetooth&reg; Connector, 1x testo 510i bluetooth differential manometer, 2 x testo 115i bluetooth pipe clamp thermometer, instrument carry case, AC USB power supply.

With this kit, you will be equipped for the most important measurements involving domestic heating systems: the testo 300 flue gas analyzer is supplied with O2 and CO sensor up to 4,000 ppm, basic flue gas probe, testo Bluetooth&reg; Connector, 1x testo 510i bluetooth differential manometer, 2 x testo 115i bluetooth pipe clamp thermometer, 1 x testo gas leak detector, instrument carry case, AC USB power supply.

The testo 300 FGA 'Smart' upgrade set allows connectivity to the testo Smart probe range. You can perform up to four additional wireless measurements in parallel to your exhaust gas measurement . Using the testo bluetooth adaptor supplied in the set, switch on the individual Smart Probes and they will automatically connect to your flue gas analyzer. All parallel measurements are also automatically displayed on your testo 300 and can be started and stopped simultaneously. Via the connection to the Smart App, the measurement, documentation and data transfer of all parallel measurements is carried out in a fast and professional manner.

The testo 300+ Flue Gas Analyser Heat Pump Kit is a professional measurement package for engineers working across boiler and heat pump heating systems. It supports combustion testing alongside wider heating diagnostics, making it suitable for modern mixed-technology installations. It is ideal for boiler servicing and combustion checks, heat pump-related service workflows, commissioning, diagnostics and efficiency reporting.

The testo 300+ Flue Gas Analyser Advanced Kit is a professional combustion analysis package for engineers who need accurate boiler testing, diagnostics and emissions measurement. It supports efficient on-site workflows with dependable flue gas readings and practical accessories for more demanding service tasks. It is suited to advanced boiler servicing, commissioning, emissions checks, combustion performance diagnostics and CO safety testing.

The testo 300+ Flue Gas Analyser Smart Kit is a connected professional combustion testing package for modern heating engineers. It combines accurate flue gas measurement with smart digital workflows to simplify boiler servicing, diagnostics and reporting. It is ideal for boiler servicing and commissioning, digital reporting, combustion efficiency checks, CO safety testing and emissions documentation.

The testo 300+ Flue Gas Analyser Ultra Smart Kit is a premium connected combustion testing package for engineers who need advanced diagnostics and efficient digital reporting. It supports accurate flue gas analysis, streamlined workflows and reliable documentation for demanding heating applications. It is suited to advanced boiler servicing, emissions and compliance checks, smart diagnostics, CO safety testing and digital reporting.

The testo 300 flue gas analyzer with Longlife sensors is ideal for heating engineers who carry out installation and maintenance work on heating systems several times a day. It combines decades of experience in measuring technology with contemporary smart-touch operation, robust construction and e-mailing of reports. The testo 300 enables easy measurement of flue gas, draught, pressure, ambient CO and differential temperature – you can also retrofit an NO sensor.

The testo 300LL Longlife Standard Kit is a professional flue gas analyser package with long-life O₂ and CO H₂-compensated sensors up to 30,000 ppm, with NO measurement available as a retrofit option. It provides reliable combustion data for engineers carrying out demanding heating service work. It is ideal for boiler servicing and commissioning, combustion efficiency checks, CO safety testing and emissions reporting.

The testo 300LL Longlife Flue Gas Analyser with Printer is a durable professional combustion analyser with long-life O₂ and CO H₂-compensated sensors up to 30,000 ppm, with NO measurement available as a retrofit option. It supports accurate testing and instant printed documentation on site. It is ideal for boiler servicing and commissioning, high-range CO safety checks, emissions testing and printed service reporting.

The testo 300LL Longlife Flue Gas Analyser with NO Sensor is a durable professional combustion analyser with long-life O₂, CO H₂-compensated up to 30,000 ppm, and integrated NO measurement for advanced emissions testing. It is built for demanding boiler diagnostics and long-term field use. It is suited to boiler servicing and commissioning, CO and NO emissions checks, combustion efficiency testing and compliance reporting.

The ideal equipment for heating engineers: with this testo 320 flue gas analysis set, you can carry out your measuring tasks on heating systems quickly and efficiently. Use the flue gas analyser to measure flue gas, draught, pressure and differential temperature. Can also measure ambient CO and detect gas leaks with an optional additional probe.

The T&Uuml;V-tested modular flue gas probe with 300 mm long probe shaft features a quick-change click system on the handle, which enables easy replacement of the probe shaft. The thermocouple NiCr-Ni, which is integrated in the probe shaft, enables temperature measurement up to 500 &deg;C. Flue gas path and temperature channel can be conveniently connected to the measuring instrument via a practical bayonet lock. In addition, a dirt filter protects the instrument and its sensors from contamination.

T&Uuml;V-tested modular flue gas probe with 300 mm long probe shaft including dirt filter and thermocouple. The quick-change click system enables quick, flexible replacement of the probe shaft.

General technical data	Diameter probe shaft 8 mm
	Cable length 2.2 m
	Length probe shaft 300 mm
	Product colour Black
	Diameter 6 mm
	Temperature maximum 500 °C
	Weight 552 g

Modular flue gas probe - 300 mm, Ø 8 mm, Tmax 500 °C, TÜV-tested

Modular flue gas probe - 300 mm, Ø 8 mm, Tmax 500 °C, TÜV-tested

General technical data

General technical data

Accessories