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.
Measuring Comfort Level and Indoor Air Quality
- 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 H4>

- 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
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- 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 H4>

- testo 440 air velocity & IAQ measuring instrument
- Humidity and temperature probe with Bluetooth
- Basic case for testo 440 and probe
testo 440 Lux Kit
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- testo 440 air velocity & IAQ measuring instrument
- Lux probe (wired)
- Basic case for testo 440 and probe
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 H4>
Which probe for which application? Download this probe comparison and learn all about the testo 440 portfolio of probes.