Jump to content


To ensure that you can trust the quality of our services at all times, we answer all questions about our quality standards here.

How do you ensure that your employees are qualified for the respective service?

The qualifications of our employees are stored in our training system. Our employees are highly qualified engineers and technicians who receive continuous internal training and are trained for our services. The team leaders assign their employees according to their qualifications for the respective service. For example, they know the individual speciality of the GxP services staff and thus find the right team for an instruction at your site.

Is it possible to visit your calibration laboratories (customer audit)?

Our calibration laboratories can be visited and we also carry out customer audits for you. To arrange an appointment, please contact the contact person responsible for you. 

Are there any references for your services in the areas of calibration, qualification and validation?

We have realised many successful projects with a wide variety of focal points for our customers. You can find a selection of our references here:


When is a calibration record audit-proof?

A calibration record is usually a kind of "reduced" calibration certificate that does not contain all the information that a detailed calibration certificate would contain and therefore cannot be described as audit-proof. However, the calibration records from Testo Industrial Services are created according to standard specifications and are therefore audit-proof. 

Is Testo Industrial Services GmbH certified according to ISO 9001?

Testo Industrial Services Quality management system is certified according to ISO 9001. In addition, we have an environmental and energy management system certified according to ISO 14001 and ISO 50001. Our laboratories are accredited according to the DIN EN ISO 17025:2018 standard. An overview of all our certifications & accreditations can be found here:

Accreditation & certification