Measuring Comfort Level and Indoor Air Quality

Measuring the air quality and comfort level of indoor spaces makes it possible to maintain the optimal year-round environment for all of a building's occupants. These versatile testo 440 kits measure all the relevant parameters – CO2 concentration in the air, degree of turbulence, temperature, humidity, and illuminance.

  • Intuitive measurement menus
    The testo 440 comes programmed with clearly structured menus for degree of turbulence and long-term measurement (with freely selectable measuring intervals).
  • Wireless convenience
    All of the testo 440's probes are also available as wireless Bluetooth versions.
    This makes for less cable clutter in your instrument's case.
  • Comprehensive selection of probes
    For air velocity, CO2, CO, degree of turbulence, humidity and temperature, and lux. 
  • Low maintenance instrument
    Only the individual probe heads need to be calibrated. You can use the measuring instrument and handle with a variety of interchangeable probes.

The measuring instrument for all comfort level parameters

Because good ideas in a workplace only flourish when the environment is right – use the testo 440 to measure indoor conditions, and create the best possible feel-good climate:

  • Guarantee a cosier ambience
  • Improve indoor air quality
  • Monitor humidity reliably
  • Control lighting more effectively

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Kits for IAQ and comfort level measurement:

testo 440 Indoor Comfort ComboKit with Bluetooth

testo 440 Indoor Comfort ComboKit with Bluetooth
View Kit
  • testo 440 air velocity & IAQ measuring instrument
  • Turbulence probe (wired)
  • CO2 probe with Bluetooth, including temperature and humidity sensor
  • Combi-case for testo 440 and probes

testo 440 CO2 Kit
with Bluetooth

testo 440 CO2 Kit with Bluetooth
View Kit
  • testo 440 air velocity & IAQ measuring instrument
  • CO2 probe with Bluetooth, including temperature and humidity sensor
  • Basic case for testo 440 and probe

testo 440 Humidity Kit
with Bluetooth

testo 440 Humidity Kit with Bluetooth
View Kit
  • testo 440 air velocity & IAQ measuring instrument
  • Humidity and temperature probe with Bluetooth
  • Basic case for testo 440 and probe

testo 440 Lux Kit

testo 440 Lux Kit
View Kit
  • testo 440 air velocity & IAQ measuring instrument
  • Lux probe (wired)
  • Basic case for testo 440 and probe

Intuitive Measurement Menus

The menus programmed in the instrument efficiently guide you through volume flow measurements in ducts and at outlets, and with K factor and pitot tube measurements.

testo 440 Probes

Which probe for which application? Download this probe comparison and learn all about the testo 440 portfolio of probes.