The Fluke Calibration 562620P High-Temperature PRT Probe with Carrying Case and INFO-CON for 1523/1524, 20 in. 100 Ohm is nominally 100 Ω; it has a temperature range of -200 °C to 661 °C. This probe makes great working or check standards for calibration work up to the aluminum point. If you are using block calibrators, furnaces, or temperature points above normal PRT (platinum resistance thermometer) temperatures (420 °C), then the 5626-20-P is for you.

Using a regular PRT at temperatures above 500 °C exposes the platinum to contamination. If the PRT is used as a reference or calibration standard, contamination is a major problem. SPRTs (standard platinum resistance thermometers), which are more expensive and delicate, can handle the higher temperatures, but with greater risk to the instrument due to shock, contamination, or mishandling. The 5626-20-P is designed to reduce the contamination risk through the use of internal protection, without impairing performance.

The Fluke Calibration 5626-20-P comes with an accredited calibration. The calibration comes complete with ITS-90 constants and a resistance-versus-temperature table.