Real time data logger with integrated SD memory card measures/records air velocity, air temperature and contact temperature with an integrated Type J/Type K thermocouple input. The R4500SD measures air velocity, air temperature and has a built-in contact thermometer. Featuring automatic temperature compensation, 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.