Extech EA15-NIST -NIST Calibration Certificate - 7 Thermocouple Datalogging Thermometer Dual Input with PC Interface features: Internal memory stores up to 8800 data sets; Seven Thermocouple type selections: K, J, T, E, R, S, and N; Compact and rugged design features large backlit display; Built-in datalogger to store 8800 measurements; Each record stores Time, T1 and T2; Manual push-button datalogging or automatic with programmable sample rate of 3 to 355 seconds per reading; Transfer recorded data to a PC for analysis via RS-232 interface.