Thermocouple Thermometer, RTD, Thermocouple, Number of Channels 4, Includes NIST-Traceable Certificate No, Accuracy +/-0.4 Percent +1.8 Degrees F/1 Degrees C (Types J, K, E, T, Pt100), +/-0.5 Percent +2 Degrees F/1 Degrees C (Types R, S)