Gaomei Tester (Tianjin) Technology Co., Ltd. is a German company specializing in optical measurement. Its history can be traced back to Paul Gossen Co. K.-G, founded in 1919. In 1932, the company began to explore the field of optical measurement. With the past 90 years of hard work and innovation, the company has enjoyed a high reputation in the fields of illuminance, brightness, spectroradiation illumination measurement, exposure meters, light meter, etc., and has become a close partner of customers and specific OEM solution demanders. Certified lighting laboratories offer a wide range of calibration and measurement services for their own and other manufacturers’ products. The photometric business unit was separated from GossenMetrawatt GmbH on November 1, 1997 and renamed GossenFoto GmbH.

As a company specializing in optical measurement, Gaomei Tester has decades of experience in related fields. Continuous innovation is the answer to the rapidly changing technologies, regulations and markets. The excellent quality and reliability of the company's products are guaranteed by high-quality employees, production in Germany, certified quality management system and approved lighting laboratories.