Test Products International, Inc. (TPI) is a leading manufacturer of handheld test and measurement instruments, headquartered in Beaverton, Oregon, USA. Founded in 1997, the company has grown to serve professionals in HVAC, electrical, industrial maintenance, and utility sectors worldwide. TPI's product portfolio encompasses a broad range of highly reliable and affordable test tools. Key product families include digital multimeters (e.g., the 190 series, the pocket-sized 100 series), AC/DC clamp meters (such as the 255 and 275 series), and specialty instruments like combustion analyzers and refrigerant leak detectors. The company also offers a comprehensive line of temperature measurement devices, including infrared thermometers, thermocouple thermometers, and dataloggers. In the field of pressure and airflow, TPI provides manometers and anemometers for HVAC technicians. TPI is distinguished by its commitment to rugged, easy-to-use designs that deliver accurate readings in demanding field conditions. Its instruments are widely distributed through electrical wholesalers, HVAC distributors, and online channels across North America and Europe. Though not a semiconductor manufacturer, TPI is a prominent niche player in the test and measurement segment of the electronic components industry. The company continuously innovates, integrating advanced sensor technologies and wireless connectivity into its latest products. TPI's customer-centric approach includes extensive support, calibration services, and a strong warranty program.