For more than 40 years, Thermo Gauge Instruments has built precision blackbody calibration systems, including rapid-response graphite tube furnaces designed to approximate Max Planck’s ideal for thermal-radiation measurement. Its in-house machine shop supports custom builds and long-term service, with every blackbody system backed by original or upgraded replacement parts; many units remain in use today. Thermo Gauge’s systems are used by standards and calibration laboratories worldwide.