Founded in 1957, Testo, Inc. is a world leader in the design, development and manufacture of portable test and measurement instrumentation. The company is a manufacturer and marketer primarily of Portable Combustion Efficiency and Air Emission Analyzers for residential, commercial and industrial boiler/burner tuning & EPA emission measuring/reporting. Backed by 50 years of measuring engineering experience our mission is to provide the best quality, service and value in the industry.

Over the years, Testo’s product line has expanded to include a large variety of temperature measuring instruments, plus, dataloggers, air velocity meters, humidity and dew point meters, refrigeration service analyzers, multi-function instruments, stack gas analyzers and air emission monitors, water analyzers, tachometers, as well as sound, pressure and light meters. Testo offers NIST calibrations on all their instruments as well as ISO 9001 quality standards, up to three year warranties on parts, plus service for the life of the instrument.