The REED SD-947 is a 4-channel thermocouple thermometer with data logging, supporting Type K, J, R, S, E, and T thermocouples plus 2-channel RTD probes. It logs readings directly to an SD card (up to 16GB) at user-selectable intervals from 1 to 3600 seconds, exporting data as Excel-compatible files without additional software. The unit features a backlit quad display capable of showing up to four temperatures simultaneously along with temperature differential, plus max/min tracking.