E+E Elektronik is an Austrian sensor technology company founded in 1979 and headquartered in Engerwitzdorf, Upper Austria. Since 1994, the company has been a wholly owned subsidiary of DR. JOHANNES HEIDENHAIN GmbH. E+E Elektronik develops and manufactures sensors, transmitters, handheld meters, data loggers, and calibration systems for humidity, temperature, CO₂, air velocity, dew point, moisture in oil, pressure, differential pressure, and flow measurement. Core technology is built on proprietary thin-film sensor fabrication in its own cleanroom, with specialized coatings for high-humidity and chemically aggressive environments. The company operates an ISO/IEC 17025 accredited calibration laboratory at its Austrian headquarters, authorized to maintain national standards for humidity, dew point, air velocity, and CO₂ concentration. E+E Elektronik holds ISO 9001, IATF 16949, and ISO 14001 certifications. With an export share of 96% and over five million sensors installed worldwide, the company serves HVAC, pharmaceutical, cleanroom, automotive, agricultural, meteorological, and industrial process control applications. Global operations include subsidiaries in China, Germany, France, India, Italy, Korea, and the United States, with distribution partners in more than 60 countries.