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£979.00 £1,174.80 (Inc. VAT)

Product Description

  • Intuitive measurement menus and fast-response Smart-Touch display
  • Including O2 and CO sensor up to 4,000 ppm
  • In the kit: testo 300 flue gas analyzer, including O2 and CO sensor up to 4,000 ppm, mains unit, basic flue gas probe, 1.5 m hose; including cone for fixing, EasyHeat software, soft-case style instrument bag
  • 3rd sensor slot to allow optional Nitric Oxide (NO) sensor to be fitted to allow device to give calculated NOx measurement (sensor 0393 0151 required)
  • Integrated micro-pressure measurement
  • Documentation on site and reports sent by e-mail

With this kit, you will be equipped for the most important measurements involving heating systems: the EN 50379, Parts 1-3 compliant testo 300 flue gas analyser is supplied with O2 and 4,000ppm CO sensor, basic flue gas probe, soft-case style instrument bag with carrying handle ,2 x pipe clamps for differential temperture, pressure connection set. If required a testo fast bluetooth printer 0554 0621 can be used to give local printout of measured values (printer NOT supplied in this kit)
testo 300 flue gas analyzer with smart-touch operation – Features
Impressive measuring technology and quality
•    Fitted with O2 sensor, and 4,000ppm CO sensor
•    Longer sensor service life thanks to automatic sensor protection
•    TÜV-tested according to EN 50379, Parts 1-3
•    Supplied with compact flue gas probe with latching connector to ensure a reliable and robust connection
•    Optionally available probes and accessories for further measuring tasks, such as gas flow pressure measurement, gas pipe testing, differential temperature measurement and ambient CO measurement.
Smart, intuitive, efficient: easy operation in day-to-day work
•    Smart-touch display for intuitive operation of the flue gas analyser: the display responds without delay – just as easy as on your smartphone
•    Get the measurement result faster: clearly structured measurement menus for all relevant measurements
•    Create documentation (including measuring value, measuring location, customer data) easily on site
•    Save PDF measurement reports directly in the instrument and always have them available
•    Signature function: your customer can sign measurement reports directly on the instrument
•    E-mail measurement reports directly to the office or to customers via WiFi hotspot
•    Large 5-inch HD display – enables you to see all the system’s parameters immediately
•    Ready to use straight away: in standby mode, the testo 300 is ready to measure at the touch of a button. Use it straight away with the next customer – because you no longer need to wait for the end of the zeroing phase
•    Integrated Bluetooth® interface: immediate printout of the measuring values on site with the appropriate printer (optional) or transfer of pdf reports to PC or smartphone.

Flue gas measurement on heating systems

Ideal for measurements involving heating systems:

  • high-quality sensors, smart-touch operation, clearly structured measurement menus, creation of documentation on site, e-mailing of reports, large HD display, robust housing

Further areas of application:

  • gas flow pressure measurement*, gas pipe test*, differential temperature measurement (flow and return temperature on heating systems)*, ambient CO measurement*, flue draught measurement on heating systems*

* Please note: additional probes or accessories are required for these measurements and have to be ordered separately.

Click below to Download Testo 300 Data Sheet

General technical data
Operating humidity 15 to 90 %RH non-condensing
Weight approximately 800 g
Dimensions 244 (including probe connection) x 98 x 59 mm (LxWxH)
Operating temperature -5 to +45 °C
Protection class IP40
Product colour black/orange
Display type 5.0″ touch display, HD 1280*720 pixels, IPS (160 k)
Power supply Rechargeable battery, USB mains unit
Authorizations TÜV-tested according to 1st German Federal Immission Control Ordinance (BImSchV) EN 50379, Parts 1-3
Guarantee Gas sensors (O₂, CO) 24 months; rechargeable battery: 12 months; Thermocouple 12 months
Memory 1,000,000 measuring values
Storage battery type Lithium ion battery
Battery life 10 h
Storage temperature -20 to +50 °C
Charging temperature 0 to +45 °C

Compact basic flue gas probe, 180 mm, Ø 6 mm, Tmax 500 °C

Diameter probe shaft 6 mm
Cable length 1.5 m
Length probe shaft 180 mm
Product colour Black
Temperature maximum 500 °C
Diameter 6 mm
Weight 346 g
Clamp probe with NTC temperature sensor – for measurements on pipes (Ø 6-35 mm)
Measuring range -40 to +125 °C
Accuracy ±1 °C (-20 to +85 °C)
Reaction time t₉₉: 60 s
Weight 76 g
Cable length 1.5 m
Product colour Black
Temperature – TC Type K (NiCr-Ni)
Measuring range -40 to +1200 °C
Accuracy ±0.5 °C (0.0 to +100.0 °C)

±0.5 % of mv (Remaining Range)

Resolution 0.1 °C (-40 to +999.9 °C)

1 °C (Remaining Range)

Differential Pressure – Piezoresistive
Measuring range -100 to +200 hPa
Accuracy ±0.5 hPa (0 to +50.0 hPa)

±1 % of mv (+50.1 to +100.0 hPa)

±1.5 % of mv (+100.1 to +200 hPa)

Resolution 0.01 hPa
Flue gas O₂
Measuring range 0 to 21 Vol.%
Accuracy ±0.2 Vol.%
Resolution 0.1 Vol.%
Differential Pressure flue gas Draught – Piezoresistive
Measuring range -9.99 to +40 hPa
Accuracy ±0.005 hPa (+0 to +0.1 hPa)

±0.02 hPa (+0.1 to +3.00 hPa)

±1.5 % of mv (3.01 to +40 hPa)

Resolution 0.001 hPa (0 to 0.1 hPa)

0.01 hPa (Remaining Range)

Flue gas degree of effectivity, Eta (calculated)
Measuring range 0 to 120 %
Resolution 0.1 %
Flue gas loss (calculated)
Measuring range 0 to 99.9 %
Resolution 0.1 %
Flue gas CO₂ calculation (calculated from O₂)
Measuring range Display range 0 to CO₂ max
Accuracy ±0.2 Vol.%
Resolution 0.1 Vol.%
Flue gas CO (without H₂-compensation)
Measuring range 0 to 4000 ppm
Accuracy ±20 ppm (0 to 400 ppm)

±5 % of mv (401 to 2000 ppm)

±10 % of mv (2001 to 4000 ppm)

Resolution 1 ppm
Measuring range 0 to 2000 ppm
Accuracy ±10 ppm (0 to 100 ppm)

±10 % of mv (101 to 2000 ppm)

Resolution 1 ppm
Differential Pressure 4 Pa measurement – Piezoresistive
Measuring Range -50 to +50 Pa
Accuracy ±0.3 Pa (< 10 Pa)

±3 % of mv (Remaining Range)

Resolution 0.1 Pa
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