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    Climate measurement improved to the maximum.

    testo 400 in laboratories and cleanrooms.

    We recommend: Universal air velocity & IAQ (Indoor Air Quality) measuring instrument testo 400

    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

      Accurate recording of even the smallest differences in 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 %

    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)

    • 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 %

    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

      Accurate recording of 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

    Servicing heat pumps

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

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    Product configurator

    Product consultant

    Customised multifunction instrument

    • Put your own combination together:

    • Measuring instrument, probes and accessories

    • tailored to your application

    Multifunction 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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    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.

    Now new:

    Professional 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

    Clever

    Free download, free use

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    Professional measuring programs