The Gemini R is a black body source with which radiation pyrometers, commonly referred to as IR sensors, can be calibrated. With a temperature range of 50°C to 550°C, the temperature of the cavity can be set with 0.1°C resolution.
The temperature of the furnace is set and indicated on a PID controller. An independent indicator is also provided for higher accuracy with a standard probe, which indicates the actual radiance temperature. Temperature variation over a 5-minute period, as viewed on the temperature controller, is ±0.2°C, and a radiation thermometer directed into the cavity detects similar variations.
