loading spinner
Testo 300 Standard Kit
  • Testo 300 Standard Kit
  • Testo 300 Standard Kit
  • Testo 300 Standard Kit
  • Testo 300 Standard Kit

Testo 300 Standard Kit

Testo Approved distributor and service company.

Includes: testo 300 flue gas analyzer, including O2 and CO sensor up to 4,000 ppm, mains unit, basic flue gas probe, spare dirt filters, EasyHeat software, instrument case.

  HTTPS Secure

Our pages are encrypted and protected from cyber-attack.


Payment Card Industry Data Security Standard (PCI DSS) Compliant.


TLS (SSL) - all data/information is secure from interception.

The testo 300 compact flue gas analyser is fully operated via the large touch display. You can see all the measuring values straight away without scrolling. The particularly scratch resistant screen in embedded in a robust plastic housing which remains reliable even in tough day-to-day working conditions.

Menus for the most important measurements are already stored in the testo 300 and reliably guide you through the relevant application. The testo 300 flue gas analyser isn’t hampered with slow waiting times or start-up phases, it is immediately ready to go at the touch of a button in standby mode. Documentation is dealt with just as quickly – reports can be created and sent directly on site.

Fitted with the ‘longlife’ cells, the testo 300 offers a 4 year warranty. There is also an optional NOx sensor available. The O2 sensor, fitted in all Longlife models, is extremely durable and an optional automatic dilution up to a maximum of 30,000 ppm CO protects the CO sensor.


Large scratch-resistant 5" HD display with smart-touch operation and replaceable protective film.
Stored, intuitive menus for all relevant measurements.
Optional: extremely durable O2 sensor and automatic dilution up to 30,000 ppm CO.
Ready to measure at the touch of a button in standby mode.
4 strong magnets with rubber coating for material friendly mounting.
E-mailing of reports directly on site, with integrated customer address book.

Professional Documentation

Create measurement protocols with all the information about readings, customers and heating systems directly on site, add comments to them, have the protocols confirmed by the customer’s signature and send the protocols. You can also store your company logo. All PDF reports with all the important information are also saved in the instrument, so that they are always to hand.

Testo 300 Product Video

Testo 300 kits - for domestic boiler servicing and commissioning
testo 300 Standard Kit testo 300 Standard + Printer testo 300 Advanced Kit
Order Number 0564 3002 70 0564 3002 71 0564 3002 81
testo 300, including mains unit O₂, CO 4,000 ppm. O₂, CO 4,000 ppm. O₂, CO 4,000 ppm.
Probe, including 10 spare filters Compact flue gas probe
(180 mm, Ø 6 mm).
Compact flue gas probe
(180 mm, Ø 6 mm).
Compact flue gas probe
(180 mm, Ø 6 mm).
Printer, including spare paper
testo EasyHeat PC software
Instrument bag
Pipe clamp probes for differential temperature
Pressure hose connection set
Warranty 2 years. 2 years. 2 years.

Testo 300 Specifications
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 L x W x H.
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.
Authorisations TÜV-tested according to 1st German Federal Immission Control Ordinance (BImSchV) EN 50379, Parts 1-3.
Memory 1,000,000 measuring values.
Storage battery type Lithium ion battery.
Battery life 10 h.
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.
0564 3002 70


Testo 300 Datasheet

PDF Specifications of the Testo 300 Flue gas Analyser.

Download (2.62M)

16 other products in the same category: