Testo

Testo

Testo is a German manufacturer of portable and stationary measurement instruments for temperature, humidity, pressure, airflow, and thermal imaging. Founded in 1957 and headquartered in Lenzkirch, Germany, Testo serves professionals in HVAC engineering, refrigeration, building diagnostics, food safety management, and industrial process measurement. Their instruments combine high measurement accuracy with field ruggedness, and many models feature Bluetooth connectivity with the Testo Smart App for mobile data logging and reporting.

Testo's broad product portfolio includes handheld probes, data loggers, fixed transmitters, and thermal imaging cameras. The company has a strong presence in both the trades — serving HVAC and refrigeration technicians — and in regulated industries where measurement data must be documented and traceable, such as pharmaceutical cold chain and food processing environments.

Key Product Lines

• Thermal Imaging Cameras: Compact and high-resolution infrared cameras for building envelope inspection, electrical panel surveys, and predictive maintenance of mechanical and electrical systems
• Pressure and Differential Pressure Instruments: Manometers, differential pressure probes, and transmitters for HVAC duct pressure, filter condition monitoring, and process measurement
• Airflow Meters and Flow Hoods: Instruments and capture hoods for measuring air velocity, volume flow, and balancing HVAC ventilation and air distribution systems
• Transmitters and Data Loggers: Fixed transmitters and wireless loggers for continuous monitoring of CO2, humidity, temperature, and dewpoint in controlled environments

Industries Served

Testo instruments are widely used in HVAC system commissioning and servicing, building energy audits and thermography inspections, refrigeration and cold chain management, food processing and catering safety, cleanroom and controlled environment monitoring, and industrial process control. Their instruments are accepted in quality-critical and regulated environments worldwide.