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    Intuitive climate measurement

    testo 400 in laboratories and clean rooms.

    Measurements in Laboratories and Cleanrooms

    Suitable testo 440 probes are also available for critical process control measurements, for which maximum precision, and resiliency are essential. Ideal for industrial environments where temperatures are high, as well as laboratories, where it is essential to record even the smallest values with a high degree of accuracy.

    • Intuitive measurement menus
      Clearly structured measurement menus are programmed into the measuring instrument and lead to accurate results.

    • Convenient measurement
      Do you carry out measurements in environments where Bluetooth is not possible?
      No problem: switch the probe head from Bluetooth to the wired handle and you’re ready to go.

    • High-precision probes
      Fume hood probes for laboratories/clean rooms; vane probes for laminar flow measurement;
      Humidity probes with an accuracy of

    • Intelligent calibration concept
      Only the probe heads need to be calibrated. You can continue working with your meter, handles and other probes.

    Multifunction IAQ Meters: online product configurator

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    When a high degree of precision is required

    The specially designed, high-precision probes for the testo 440 Multifunction IAQ Meter can assist you with these applications, for example:

    • Reliable measurement of laminar flows (laminar flow)

    • Accurately recording even the smallest differences in air velocity, from 0.02 m/s

    • Measuring humidity in critical processes with an accuracy of 1 %

    When a high degree of precision is required

    • The specially designed, high-precision probes for the testo 440 Multifunction IAQ Meter can assist you with the following applications:

      • Reliable measurement of laminar flow

      • Precisely detect the smallest flow differences from 0.02 m/s

      • Measuring humidity in critical processes with an accuracy of 1 %

    When a high degree of precision is required

    The specially designed, high-precision probes for the testo 440 Multifunction IAQ Meter can assist you with the following applications:

    • Reliable measurement of laminar flow

    • Accurately recording even the smallest differences in air velocity, from 0.02 m/s

    • Measure humidity in critical processes with an accuracy of 1 %

    Use these probes with the testo 440 to measure with precision:

    Air velocity and IAQ meter including differential pressure sensor

    testo 440 dP with differential pressure sensor

    For pitot tube measurements and checking filters on air conditioning systems, we recommend the testo 440 dP, which includes a differential pressure sensor.

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    Use this information to measure more effectively:

    Probe comparison

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    All probes for the testo 440

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

    Laboratories / Clean rooms

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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

    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.

    What else do you want to measure?

    Comfort level

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    Overview: testo 440

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