The Hyperion R Portable Blackbody Calibration Source allows for calibration of non-contact infrared thermometers over the temperature range -20°C to 125°C. One application is the calibration of non-contact medical thermometers. With the sudden step increase in the demand to check and calibrate medical thermometers we have supplied many units for both portable and laboratory testing relating to the coronavirus outbreak. It is suitable for use as a primary radiation source for infrared thermometers from sub zero to 125°C. Laboratory performance and low uncertainty calibrations are ensured by the combination by high emissivity and excellent temperature uniformity. The digital temperature controller allows the block temperature to be set to any value from -20°C to 125°C. Traceability of the radiance temperature is established by a separate, built-in temperature indicator and included platinum resistance thermometer. A three point traceable calibration certificate is included. UKAS calibration of the resistance thermometer is available, as is radiometric calibration. Uniformity of the block is ensured by using distributed thermoelectric heat pumps with the benefit of solid state, vibration free cooling. The Hyperion R can be used with the Gallium Fixed Point Cell, Model Number 982-05-01. Melt plateau times of five hours are easily obtainable. The cells are provided with Certificate of Metal Analysis, 6N pure – 99.9999%.