Real-time data logger with integrated SD memory card measures/records up to 4 separate temperature measurements simultaneously as well as temperature differential. Accepts Type K, J, R, S, E, T thermocouples and RTD probes. The R2450SD features Data hold, Max/Min functions, and an easy-to-read backlit LCD display. Using a SD card (max 16GB), a user can manually record up to 99 readings or automatically by selecting a desired sampling rate from 1 to 3600-seconds. Quickly generate an Excel file with raw data, all without the use of software. Optional accessories include a tripod and AC adapter for continuous long-term monitoring on up to 4 separate channels.