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    Climate measurement improved to the maximum.

    testo 400 in laboratories and cleanrooms.

    We recommend: testo 400 universal air velocity & IAQ measuring instrument

    For high-precision measurements of all climate-related parameters in cleanrooms and laboratories

    • Intuitive measurement menus: Clearly structured measurement menus are stored in the measuring device and guide you safely and efficiently through the respective application.

    • Convenient measurement: Do you measure in environments where Bluetooth is not possible? No problem: simply insert the probe head from the Bluetooth handle onto the cable handle and you’re done.

    • High-precision probes: Fume cupboard probes for laboratories/cleanrooms; 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.

    Precise measurement technology for laboratories and cleanrooms

    High degree of precision is required

    The specially developed, high-precision probes support you in these applications, among others:

    • Highly accurate and position-independent differential pressure measurement (only with testo 400)

    • Reliable measurement of laminar flows

      Accurately recording even the smallest differences in 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 %

    High degree of precision is required

    The specially developed, high-precision probes support you in these applications, among others:

    • Highly accurate and position-independent differential pressure measurement (only with testo 400)

    • 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 %

    High degree of precision is required

    The specially developed, high-precision probes support you in these applications, among others:

    • Highly accurate and position-independent differential pressure measurement (only with testo 400)

    • Reliable measurement of laminar flows

      Accurately recording even the smallest differences in flow

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

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

    High degree of precision is required

    The specially developed, high-precision probes support you in these applications, among others:

    • Highly accurate and position-independent differential pressure measurement (only with testo 400)

    • Reliable measurement of laminar flows

      Accurately recording even the smallest differences in 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 %

    Probes for measurements in clean rooms and laboratories

    • Digital Pt100 temperature probes

    • Digital probes for humidity and temperature

    • Digital probes for flow measurements

    Brochure

    Measurement technology for cleanrooms

    Measure precisely. Qualify safely.
    Precision measurement technology and services for cleanrooms. From Testo.

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    Configurator

    Product consultant

    Customised multifunction

    • Put your own combination together:

    • Measuring instrument, probes and accessories

    • tailored to your application

    Multifunctional measuring instrument testo 440

    More details

    The alternative: testo 440 compact

    • Clear display

    • Easy button operation

    • Measurement data storage in the instrument

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    Air velocity & IAQ measuring instruments

    Product comparison

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    Tips

    Climate measurements in cleanrooms

    Valuable information on measuring air temperature, relative humidity and differential pressure as well as on flow testing in cleanrooms

    • The most important standards

    • Useful tips on measurements

    • Measuring device requirements

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    Measurements in cleanrooms

    Important standards for the test methods

    Selected measurements for the qualification of cleanrooms

    What should be considered when selecting the measuring device?

    Everything else you need to know about the testo 400 and other measuring instruments for laboratories and cleanrooms

    testo 400 brochure

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    Overview of the measurement menus

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    Measuring devices for the cleanroom

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    Measuring instruments for laboratories

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    testo Smart App

    One App for all applications

    The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems.

    Newly added:

    PRO measuring programs for increasing the efficiency of your applications

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    Multifunctional

    Compatible with all Bluetooth-enabled Testo measuring instruments

    Efficient

    Direct report dispatch by e-mail

    Fast

    All measurement values at a glance

    Easy

    Intuitive measurement menus

    Smart

    Free download, free use

    NEW

    PRO measuring programs