Fluke 5628 Secondary Standard PRTs, 25 OHM, 2ND LEVEL, 15IN

(item no. 1654558, 1654573, 1654618, 1654634, 1654652, 1654676, 1654708, 1654724, 3055555, 3377165) PRODUCT OVERVIEW High-temperature secondary standards Range to 661°C Meets all ITS-90 requirements for resistance ratios Rtp drift < 20 mK after 500 hours at 661°C Calibrated accuracy of ± 0.006 °C at 0 °C Fluke Calibration's high-temp secondary standards fill the gap between affordable, but temperature-limited secondary PRTs (platinum resistance thermometers) and more expensive, highly accurate SPRTs (standard platinum resistance thermometers). If you’re using block calibrators, furnaces, or temperature points above normal PRT (platinum resistance thermometer) temperatures (420 °C), then these two PRTs are for you. The Fluke 5626 is nominally 100 Ω and the 5628 (formerly Hart Scientific) is nominally 25.5 Ω. 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 aluminium point. Using a regular PRT