ESI Prüftechnik GmbH was founded in Wendlingen in 1988. It is the result of the merger of the engineering offices of Klaus Eisenhut and Thomas Stegmaier and is still an owner-managed company that is constantly evolving.

In the early years, the product range included the development and manufacture of electronic components for the measurement technology of hardness testers.

This developed into an expanded product portfolio in the areas of design, installation, commissioning and maintenance of customer-specific measuring and testing machines.

Another great step is the expansion of calibration activities and accreditation for the on-site calibration of hardness and spring testing machines by the DKD in 2004. This area has been continuously expanded since then and was completed in 2013 with the production of the first-class test standards (hardness reference blocks) required for hardness testing – an absolute milestone.

The move to the new company building in 2015 opens up further development opportunities for the company, as there is now sufficient space available for all areas.

In 2018, Thomas Stegmaier takes over the company as sole owner.

We know our products in detail and, thanks to the many years of cooperation with our suppliers and partners, we can deliver optimum solutions that benefit you as a customer.