Testo is an innovator in advanced measurement technology. The company has a distinguished history of engineering instruments with quality and value. In addition, Testo is recognized as a leader in HVAC, air flow and environmental monitoring devices. The brand serves the chemical, food service, biotechnology, and HVAC industries. Transcat provides a full selection of Testo instruments, including: temperature and humidity data loggers, combustion analyzers, light meters, pressure meters, handheld thermo-hygrometers, infrared thermometers, and other products for portable test and measurement.