Fluke Calibration 1524-P1-156 Calibration Reference Thermometer with 5627A PRT, NIST Traceable Calibration, 2 Channel, 115V Measure RTDs, PRTs, thermistors and thermocouples High accuracy: PRTs up to  0.011 C and thermocouples: up to  0.24 Two channels with datalogging of up to 15,000 time- and date-stamped measurements Graphical temperature trend feature Info-Con connectors store probe parameters