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    Intuitive climate measurement

    testo 400 in laboratories and cleanrooms.

    Measurements in laboratories and cleanrooms

    Suitable testo 440 probes are also available for critical process control measurements, for which maximum precision and resilient equipment are essential. Ideal for industrial environments where temperatures are high, as well as for 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: simply switch the probe head over from Bluetooth to the cable handle and you’re ready to go.

    • High-precision probes
      Fume cupboard 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 carry on working with the measuring instrument, handle and another probe.

    Multifunction measuring instruments: 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 air velocity & IAQ measuring instrument can assist you with these applications, for example:

    • Reliable measurement of laminar flows (laminar flow)

    • Accurate recording of 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 air velocity & IAQ measuring instrument can assist you with these applications, for example:

      • 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 air velocity & IAQ measuring instrument can assist you with these applications, for example:

    • Reliable measurement of laminar flow

    • Accurate recording of 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 to measure with precision

    Air velocity and IAQ measuring instrument including differential pressure sensor

    testo 440 dP with differential pressure sensor

    For Pitot tube measurements or checking filters on air conditioning systems, we recommend the testo 440 dP including differential pressure sensor.

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    Use these tips to measure more effectively

    Probe comparison

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    All probes for the testo 440

    Which probe for which application? Download probe comparison now and find out all about the testo 440 portfolio of probes.

    Laboratories / Cleanrooms

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    The comprehensive testo 440 brochure

    A wealth of product knowledge relating to the testo 440:

    • All probes and accessories

    • Special kits for any application

    • Details on the intuitive measurement menus

    Measurement menus

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    The intuitive measurement menus

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

    What else do you want to measure?

    Comfort level

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    Overview page testo 440

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