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Intuitive climate measurement

The testo 440 combines versatility with maximum ease of use.

Versatility in a compact design

Welcome to a new era: the testo 440 combines a compact hand-held measuring instrument with intuitive measurement menus and a comprehensive selection of air velocity & IAQ probes. Use it to keep all your air conditioning and ventilation measurements in one device.

  • Intuitive measurement menus
    Clearly structured menus for volume flow, K factor, degree of turbulence, heating/cooling output, mold detection and long-term measurement are programmed into the instrument.

  • Wireless convenience
    All the testo 440 probes are also available as wireless Bluetooth versions. This makes for less cable clutter.

  • Clear display
    Measurement configuration and display of values at a glance.

  • Particularly economical
    The testo 440 saves you money:
    the meter does not need to be calibrated, it measures all air velocity & IAQ parameters and the probes can be easily adapted for different measurements.

Multifunction measuring instruments: online product configurator

To the product consultant

The measuring instrument for any air conditioning application:

Flow measurement in ducts and at outlets

  • Intuitive menus – clearly structured for volume flow, K factor, and pitot tube measurements

  • Convenient measurement – extendable probes with Bluetooth

  • With a differential pressure sensor: the testo 440 dP for Pitot tube and filter measurements

Measuring comfort level and indoor air quality

  • Intuitive menus: turbulence measurement in accordance with ISO EN 7730/ASHRAE 55

  • Integrated long-term measurement: monitor specified locations at adjustable measuring intervals

  • A comprehensive selection of probes: turbulence, CO2, temperature, humidity, CO, lux

Measurements in laboratories and cleanrooms

  • Intuitive menus – clearly structured for volume flow measurement

  • Special applications – high-precision probes with an unrivaled level of accuracy

  • Versatility – Bluetooth or cable, the right probes for any measuring location

4 reasons why the testo 440 will make your work even easier

Clearly structured menus, large display

Menus for measuring volume flow, K factor, and degree of turbulence in accordance with EN ISO 7730 / ASHRAE 55, heating/cooling output, mold detection, and long-term measurement are programmed into the instrument, and guarantee reliable measurement results.

Measurements are easily configured via the large display; readings and results are available at a glance.

What do you need to measure?

Comfort level

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In laboratories / clean rooms

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Free downloads to help you measure more effectively:

Measurement menus

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The 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.

Probe comparison

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All probes for the testo 440

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

Laboratories/Cleanrooms

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The comprehensive testo 440 brochure

A wealth of information relating to the testo 440:

  • All probes and accessories

  • Special kits for any application

  • Details on instrument navigation