Tel：+86 10 6461 9552
Fax：+86 10 6461 9553 / 6854 7775
Testo, Inc. is a development, and manufacture of portable test and measurement
instrumentation. Backed by 60 years of measuring engineering experience, our mission is to provide quality,
service, and value in the industry. In addition, Testo is recognized as the manufacturer of portable
combustion efficiency analyzers and air emission analyzers. Testo has become a major supplier of HVAC, critical HVAC,
refrigeration, airflow, and environmental monitoring instruments for markets as diverse as chemical, food service and
production, pharmaceutical and biotechnology, and residential HVAC suppliers.
The company was founded in 1957 in Lenzkirch, in the Black Forest region of Germany.
Testo has been privately owned since its inception. Today, Testo consists of 33 subsidiaries and over 60 agents around the
world. The United States subsidiary wasfounded in 1981.
Testo's first product manufactured was a simple electronic thermometer. Today, the product line has expanded to include a
large variety of temperature measuring instruments, such as data loggers, air velocity meters, humidity and dew point
meters, refrigeration service analyzers, multifunction instruments, stack gas analyzers and air emission monitors, water
analyzers, tachometers, sound, pressure, and light meters, and thermal imagers.
Testo offers NIST calibrations (where applicable) on all instruments, as well as ISO 9001 quality standards, and up to three
year warranties on parts, plus service for the life of the instrument.