The Extech TM500-NIST is a 12-Channel Datalogging Thermometer, featuring 6 Thermocouple Types (J, K, E, T, R, S). It displays CH1 to CH8 or CH9 to CH12 on screen, and data can be recorded from all 12 channels simultaneously onto an SD card in Excel format for further analysis. It includes NIST Certification.