Stock Code
0633 3002 70

TESTO Flue gas analyzer (O2, CO up to 4,000 ppm) | TESTO 300
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.

Your advantages
- Intuitive measurement menus and the fast-response Smart-Touch display ensure easy operation – as on your smartphone
- Including O2 and CO sensor up to 4,000 ppm
- Large 5-inch HD display – see all the system's measuring values at a glance
- Creation of documentation directly on site and e-mailing of reports
TESTO Flue gas analyzer (O2, CO up to 4,000 ppm) | TESTO 300 Description
Delivery Scope
TESTO Flue gas analyzer (O2, CO up to 4,000 ppm) | TESTO 300 Technical Data
Flue gas CO (without H₂-compensation)
General technical data
Ambient CO
Differential Pressure 4 Pa measurement - Piezoresistive
TESTO Flue gas analyzer (O2, CO up to 4,000 ppm) | TESTO 300 Images



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 – Features
Impressive measuring technology and quality
- O2 sensor and CO sensor up to 4,000 ppm
- Longer sensor service life thanks to automatic sensor protection
- TÜV-tested according to first German Federal Immission Control Ordinance (BImSchV) and EN 50379, Parts 1-3
- Integrated fine pressure
- Versatile probes and fast probe changes: take advantage of quick-change probes and the multi-functional handle for attaching a variety of probe shafts (each available to order separately). You can for instance -use longer probe shafts for flue gas pipes with larger diameters or flexible probes for difficult-to-access measuring points
- 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 analyzer: 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 WLAN (hotspot)
- Large 5-inch HD display – enables you to see all the system's parameters immediately
- Testo interface function for direct data transfer of measuring values to industry/customer-specific software*
- 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
*Note: the manufacturer has to integrate an interface into the industry software to use the function
Other advantages
- 10-hour rechargeable battery life: an average measurement period of 2 hours means the flue gas analyzer is capable of being used for one week
- Integrated, extra-strong magnets for easy fixing during the measuring process
Delivery Scope
testo 300 flue gas analyzer with O2 and CO sensor up to 4,000 ppm, USB mains unit, testo Bluetooth Connector
TESTO Flue gas analyzer (O2, CO up to 4,000 ppm) | TESTO 300 Technical Data
Temperature - TC Type K (NiCr-Ni)
Measuring range |
-40 to +1200 °C
|
---|---|
Accuracy |
±0.5 % of mv (Remaining Range)
±0.5 °C (0.0 to +100.0 °C)
|
Resolution |
1 °C (Remaining Range)
0.1 °C (-40 to +999.9 °C)
|
Differential Pressure - Piezoresistive
Measuring range |
-100 to +200 hPa
|
---|---|
Accuracy |
±1 % of mv (+50.1 to +100.0 hPa)
±0.5 hPa (0 to +50.0 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 |
±0.02 hPa (+0.1 to +3.00 hPa)
±1.5 % of mv (3.01 to +40 hPa)
±0.005 hPa (+0 to +0.1 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 |
±5 % of mv (401 to 2000 ppm)
±10 % of mv (2001 to 4000 ppm)
±20 ppm (0 to 400 ppm)
|
Resolution |
1 ppm
|
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
|
Warranty conditions | |
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
|
Ambient CO
Measuring range |
0 to 2000 ppm
|
---|---|
Accuracy |
±10 % of mv (101 to 2000 ppm)
±10 ppm (0 to 100 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
|
TESTO Flue gas analyzer (O2, CO up to 4,000 ppm) | TESTO 300 Images


