
Precision begins with us.
ZERA develops, manufactures, and distributes devices and systems for the generation, measurement, testing, and calibration of electrical quantities. Our focus is on meter and instrument transformer testing technology, as well as precision laboratory technology.
Our customers include energy suppliers, testing laboratories, and meter and instrument transformer manufacturers all over the world.

Independent and customer-focused
ZERA is an employee-managed company headquartered in Königswinter am Rhein. Currently, over 100 employees are committed to precision and the highest quality. Our sales partners in over 70 countries guarantee the best local advice.
Als 1920 Zvoter-Eme-and-Rrepair-AFounded in 1996, ZERA has developed from a meter calibration service provider into a highly specialized manufacturer of testing technology. We are a member of the FNN expert team and maintain regular contact with metrology institutes around the world.
ZERA Code of Ethics
As a company with a history of more than 100 years, we are committed to our business partners, all those involved in economic life and, in particular, to our employees.
We – ZERA GmbH and its employees – therefore assume a special level of responsibility.

ZERA Philosophy
Quality from tradition
ZERA is a company with a long tradition. We are experts in the manufacture and development of innovative measurement technology. Since our founding, our thinking and actions have been focused on developing the latest technologies and the highest quality.
Fair and binding
For us, fair, long-term, and cooperative relationships with each other, as well as with our customers and representatives, are crucial. ZERA has been an employee-managed company since 2001.
At our Königswinter location, we manufacture high-quality, reliable products "made and managed in Germany." From here, we export worldwide. We are supported by our own representatives in over 70 countries and our sales engineers: This means we're always close to our customers.


