The TM500 is a 12 channel data logger thermometer. This data logger thermometer supports 6 thermocouple types (J, K, E, T, R, S). It displays CH1 to CH8 or CH9 to CH12 on the screen, data can be recorded from all 12 channels simultaneously to an SD card in Excel format for further analysis. The unit comes complete with 8 AA batteries, 12 general purpose Type K bead wire temperature probes, SD card and a durable carrying case.