General Tools DT4208SD Data Logging Digital Thermometer with Excel Format SD Card, 12 Channel Measures 12 channels of temperature; combining thermocouple types extends overall measurement range to -148 to 3092 degrees F (-100 to 1700 degrees C) Measurement range with included K type thermocouples is -50 to 500 degrees F (-45 to 260 degrees C) Displays up to eight channels at a time and one push of a button switches to channels 9 through 12 Automatically logs measurements at sampling time settable from 1 second to 1 hr.; supports manual data logging and changing of SD card storage location Big (2.5 inch diagonal) front-panel green backlit LCD is easy to read; displays maximum and minimum readings and holds any reading