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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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Air velocity & IAQ (Indoor Air Quality) measuring instruments

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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 gas concentrations

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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

NEW

Professional measuring programs