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Climate measurement improved to the maximum.

Comfort level measurement with the testo 400.

Measuring indoor air quality and comfort level

The testo 400 allows you adjust the indoor climate to comply with standards, thus minimising the risk of staff absences due to illness. With the testo 400 and its extensive probe portfolio, you can determine all relevant parameters quickly, reliably, and intuitively.

  • Intuitive measurement menus
    The testo 400 actively supports you in standard-compliant measurements. It guides you step by step through the comfort level measurement and assists you in evaluating the measurement results.

  • Wireless comfort
    Numerous probes for comfort and indoor air quality are also available in the wireless Bluetooth version. This means less stress for you and more space in the measuring case.

  • IAQ long-term measurement
    The IAQ data logger can be used independently for long-term measurement with up to six different probes after it has been programmed using testo 400.

  • Practical accessories
    With the measuring stand for comfort measurements, you always position the suitable measuring device and the probes in conformity with the standards.

Standard-compliant comfort level measurement

The testo 400 allows you to check all parameters for indoor air quality and comfort levels in compliance with the latest regulations and standards:

  • Objective statement on thermal comfort thanks to PMV/PPD measurement

  • Standard-compliant determination of turbulence, draughts, and indoor air quality

  • Determination of comfort levels at hot work stations with the WBGT measurement

Would you like a consultation?

In the online configurator, you can find out quickly and easily which combination of measuring instrument, probe and accessories best suits your requirements.

Standard-compliant comfort level measurement

The testo 400 allows you to check all parameters for indoor air quality and comfort levels in compliance with the latest regulations and standards:

  • Objective statement on thermal comfort thanks to PMV/PPD measurement

  • Standard-compliant determination of turbulence level, draught and indoor air quality

  • Determination of comfort levels at hot work stations with the WBGT measurement

Would you like a consultation?

In the online configurator, you can find out quickly and easily which combination of measuring instrument, probe and accessories best suits your requirements.

Standard-compliant comfort level measurement

The testo 400 allows you to check all parameters for indoor air quality and comfort levels in compliance with the latest regulations and standards:

  • Objective statement on thermal comfort thanks to PMV/PPD measurement

  • Standard-compliant determination of turbulence, draughts, and indoor air quality

  • Determining comfort at hot workplaces with WBGT measurement

Would you like a consultation?

In the online configurator, you can find out quickly and easily which combination of measuring instrument, probe and accessories best suits your requirements.

Sets and probes for comfort level measurement

Application videos

Comfort measurement (PMV/PPD) with the testo 400

More probes and accessories

Fully exploit the potential of the testo 400.

Practical guide

Comfort level measurement at the workplace

This is how you ensure a pleasant and comfortable ambient climate at workplaces with measurement technology from Testo.

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What is thermal comfort?

Reasons for the use of measurement technology

Measurement of room air temperature and humidity

PMV/PPD measurement

Indoor air quality assessment

And much more ...

Valuable measuring facts about testo 400

Measurement menus

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Measurement menus testo 400

With these pre-installed measurement menus, the testo 400 can assist you in carrying out measurements highly efficiently, without measurement errors, and in compliance with standards.

testo 400 brochure

Everything you need to know about the testo 400 universal IAQ instrument in one concise brochure

Application example

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Application example WBGT-kit

Easy and reliable evaluation of heat-affected workplaces with the help of the WBGT kit from Testo.

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