Testo 300LL Long Life flue gas analyser with smart-touch operation
The Testo 300 flue gas analyser with Long life 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. This kit includes a factory fitted NO sensor for NOx measurement.
Impressive measuring technology and quality
- O2 sensor and H2-compensated CO sensor up to 30,000 ppm thanks to integrated fresh air dilution
- NO sensor - 0 - 3,000ppm
- Longer sensor service life thanks to automatic sensor protection
- Integrated draught and gas zeroing without removing the probe – the flue gas probe can remain in the flue during zeroing
- For intensive daily use: high-quality Longlife sensors for O2 and CO with a service life of up to 6 years. That means at least one sensor replacement is saved in the course of a normal working life
- Compliance with EN 50379, Parts 1-3
- Integrated fine pressure and 4 Pa measurement for legally prescribed measurements
- Manufacturer's warranty of up to 5 years on O2 and CO sensor with product registration – without a maintenance contract
- 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 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 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 analyser is capable of being used for one week
- Integrated, extra-strong magnets for easy fixing during the measuring process
Testo 300LL Long Life Printer Kit + NOx
Order-Nr. 0564 3004 84

What comes with the Testo 300LL Lonf Life Print Kit + NOx
Testo 300 Long life flue gas analyser with O2 and CO H2-compensated sensor up to 30,000ppm, NO Sensor up to 3,000ppm
- USB mains unit, including cable (0554 1106)
- Modular flue gas probe 180 mm, Ø 8 mm, Tmax. 500°C; TÜV tested and certified; 2.2 m hose (0600 9760)
- Spare dirt filters for modular flue gas probe; 10 off (0554 3385)
- Free download EasyHeat PC software (0554 3332)
- Instrument case (height: 130 mm) for instrument, probes and accessories (0516 3300)
- BLUETOOTH®/IRDA printer, including 1 roll of thermal paper and rechargeable battery (0554 0621)
- Spare thermal paper for printer, indelible ink (0554 0568)
RRP £1,990.00 ex VAT
£2,338.00 incl. VAT