The 5624 delivers precision PRT accuracy at thermocouple temperatures. With a temperature range of 0°C to 1000°C the 5624 is ideal for use as a reference thermometer in high temperature furnaces. The thermometer delivers accuracy of 55 mK for its full range and long term drift of 10 mK at 0°C. This PRT has short-term stability of 5 mK and an immersion requirement of less than 153 mm at 700°C. Assembled in an alumina sheath that is 508 mm long and 6.35 mm in diameter.