ZERA

Founded in 1920 in Königswinter, Germany, ZERA GmbH is one of the world's leading providers of precision measurement and testing technology for the electrical power industry. With more than a century of experience, ZERA has built a global reputation for innovation, accuracy, reliability, and German engineering excellence.

Originally established as a meter calibration service provider, ZERA has evolved into a highly specialized manufacturer of test equipment for electricity meters, current transformers (CTs), voltage transformers (VTs), and metrological laboratories. Throughout its history, the company has continuously driven technological advancement in testing and calibration systems, introducing groundbreaking innovations such as early electromechanical error indicators, electronic reference standards, digital comparators, and primary standard systems for national metrology institutes. Today, ZERA's solutions achieve the highest internationally recognized accuracy classes and are trusted by utilities, calibration laboratories, national standards institutes, and equipment manufacturers worldwide.

ZERA remains committed to uncompromising precision, superior quality, absolute reliability, and close customer partnership. With decades of industry expertise, the company develops innovative, customer-oriented solutions that integrate seamlessly into existing testing and calibration processes. Its commitment to “Made & Managed in Germany” extends beyond manufacturing to include technical consulting, engineering support, and after-sales service.

Since 2001, ZERA has operated as an employee-managed company, preserving its independence while fostering a culture of long-term commitment, innovation, and continuous improvement. All research, development, manufacturing, and quality management activities are carried out at its headquarters in Germany.

Today, ZERA exports more than 80% of its products to customers in over 70 countries. Supported by a worldwide network of representatives and sales engineers, the company provides reliable local support while maintaining the highest standards of German quality and precision.

Combining over 100 years of heritage with a relentless focus on innovation, ZERA continues to set benchmarks in electrical measurement, calibration, and testing technology worldwide.