Founded in 1971, „Ingenieur-Union“ (i.e. “a group of engineers”) and under the management of Wolfgang Karl, INGUN has grown to be an international specialist for Testing Equipment. The break-through was achieved in 1974 with the first European Test Probe.

Today, INGUN is represented in over 30 countries and on all five continents. Furthermore, INGUN has subsidiaries in Switzerland, Benelux, England and Mexico .

INGUN has had its headquarters at Constance at the Lake of Constance for over 30 years and presently employs approx. 135 people.