testo 440 CO₂ Kit with Bluetooth

$1,644.50 inc. GST

• Intuitive: Clearly structured measurement menus for long-term measurements and parallel determination of CO2 concentration, humidity, and air temperature in indoor areas

• Precise: absolute pressure compensation, calculation of wet bulb temperature, dew point and absolute humidity 

• Convenient: Wireless probes, internal memory for data storage, and USB port for data export

• Versatile: The testo 440 setup can be expanded with a large selection of digital probe

The testo 440 kit is great for carrying out indoor air quality measurements. The testo 440 air velocity and IAQ measuring instrument and its CO2 probe with humidity/temperature sensor can all be safely stored in the included case.


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Use this practical kit to measure CO2 concentration, humidity and air temperature and to evaluate the indoor air quality in offices, production areas or storage facilities. The multifunction measuring instrument and the CO2 probe feature an intelligent calibration concept, ease of use and maximum convenience for your measuring tasks.

testo 440 CO2 Kit with Bluetooth in detail

testo 440 air velocity and IAQ measuring instrument:

  • No task is too challenging, no application too specialized: the testo 440 combines a compact hand-held measuring instrument with intuitive measurement menus and a wide selection of air velocity and IAQ probes
  • Clearly structured measurement menu for long-term measurement: for long-term monitoring, enter the measurement time and measuring cycle in the measuring instrument and record measurement data trends
  • Easy storage and evaluation of measurement data. Measurement data memory for up to 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on the computer (e.g. with Excel)
  • Practical magnets for easy attachment of the measuring instrument to metal surfaces 
  • Automatic detection of probes, e.g. CO2 probe
  • Large, backlit colour display 


CO2 probe with Bluetooth, including temperature and humidity sensor:


  • Measure CO2 concentration, humidity and air temperature and calculate dew point, wet bulb temperature and absolute humidity
  • Accurate measurement results thanks to air density compensation via the integrated absolute pressure measurement 
  • Measuring range: 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
  • The Bluetooth handle makes it more convenient to carry out your measurements and guarantees less cable clutter in the case
  • Practical button on the handle: to store individual readings
  • Endlessly versatile: a universal handle can be connected to all probe heads – so you can take care of more applications using less equipment, and save space too
  • Intelligent calibration concept: the measuring instrument remains in continuous use, since only the probe head is sent in for calibration

Scope of delivery

  • testo 440 air velocity and IAQ measuring instrument, 3 x AA batteries, USB cable and calibration protocol (0560 4401)
  • CO2 probe* with Bluetooth, including temperature and humidity sensor (consisting of CO2 probe head and Bluetooth handle); 4 x AA batteries, table stand and calibration protocol (0632 1551)
  • Basic case for testo 440 and 1 probe 
  • *Please do not use the probe in condensing atmospheres. For continuous application in high-humidity ranges
    •     > 80% RH at ≤ 30 °C for > 12 h
    •     > 60% RH at > 30 °C for > 12 h


Temperature - NTC

Measuring range -40 to +150 °C
Accuracy ±0.4 °C (-40 to -25.1 °C)
±0.3 °C (-25 to 74.9 °C)
±0.4 °C (75 to 99.9 °C)
±0.5 % of mv (Remaining Range)
Resolution 0.1 °C

Temperature - TC Type K (NiCr-Ni)

Measuring range -200 to +1370 °C
Accuracy ±(0.3 °C + 0.3 °C)
Resolution 0.1 °C

General technical data

Dimensions 154 x 65 x 32 mm
Operating temperature -20 to +50 °C
Connectable probes 1 x digital probe with cable or 1 x Temperature NTC TUC, 1 x digital Bluetooth probe or testo Smart Probe, 1 x Temperature TC Type K
Battery type 3 AA
Battery life 12 h (typically vane measurement)
Data transfer USB interface
Storage temperature -20 to +50 °C
Weight 250 g

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