Part No. 0633 3004.73
The Testo 300 flue gas analyzer is ideal for the most important measurements involving heating systems. 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.
Delivery Scope
Truly smart flue gas measurement on heating systems with the Testo 300 flue gas analyzer. High-quality sensors, intuitive operation with smart-touch technology and smart features, such as efficient documentation and e-mailing of reports, will make your day-to-day work easier.
Testo 300 flue gas analyzer with smart-touch operation
Impressive measuring technology and quality
Smart, intuitive, efficient: easy operation in day-to-day work
*Note: the manufacturer has to integrate an interface into the industry software to use the function
Other advantages
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
Ambient CO
Measuring range 0 to 2000 ppm
Accuracy
±10 ppm (0 to 100 ppm)
±10 % of mv (101 to 2000 ppm)
Resolution 1 ppm
General technical data
Operating humidity 15 to 90 %RH non-condensing
Dimensions 244 (including probe connection) x 98 x 59 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
Guarantee Gas sensors (O₂, CO) 24 months; rechargeable battery: 12 months; Thermocouple 12 months
Authorizations TÜV-tested according to 1st German Federal Immission Control Ordinance (BImSchV) EN 50379, Parts 1-3
Warranty conditions https://www.testo.com/guarantee
Memory 1,000,000 measuring values
Storage battery type Lithium ion battery
Battery life 10h
Storage temperature -20 to +50°C
Weight approximately 800 g
Charging temperature 0 to +45°C
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
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.
Product Brochures
Manuals