Indoor air quality and comfort level

Illuminance (lux) measurements

Illuminance and light distribution have a key influence on factors such as performance and safety in the workplace.

With a lux measuring instrument from Testo, you can ensure optimum lighting conditions indoors.

Lux meters


Indoor air quality and comfort level

Measuring indoor air quality and comfort level in workplaces on a regular basis enables the indoor climate to be adjusted precisely.

Measuring instruments from Testo will help you to ensure a comfortable climate in all rooms.

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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:

PRO measuring programs for increasing the efficiency of your applications

Find out more


Compatible with all Bluetooth-enabled Testo measuring instruments


Direct report dispatch by e-mail


All measurement values at a glance


Intuitive measurement menus


Free download, free use


PRO measuring programs

Our services

Contact us

Do you have any queries, or would you like a personal consultation?
We would be happy to help you.

Customer Service

If you experience any malfunctions, please send in your measuring instrument with a brief description of the fault. Please also give us your telephone number for any inquiries. Normally, you’ll get your measuring instrument back within one week.


Our subsidiary company Testo Industrial Services supports you daily in ensuring quality while always adhering to the relevant norms and guidelines. You get all the services you need from one provider.