Fluke Calibration 5626-15-A

High-temp PRT, 100Ω, 381 mm (15 in) Secondary Standard PRT Temperature Sensors Range to 660°C Meets all ITS-90 reMeets all ITS-90 requirements for resistance ratios Rtp drift &lt, 20mK after 500 hours at 660°C Strain-free sensor design by Harts SPRT engineers If youre using block calibrators, furnaces, or temperature points above normal PRT temperatures (420 °C), then these two PRTs are for you The 5626 is nominally 100Ω and the 5628 is nominally 25.5Ω Both instruments have a temperature range of -200 °C to 661 °C They make great working or check standards for calibration work up to the aluminum point 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, 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 and 5628 are designed to reduce the contamination risk through the use of internal protection while not impairing performance