Amprobe TMD-55 Digital Thermometer Portable, dual-input thermometer for reading temperatures from two sources simultaneously, and is used in quality control and HVAC, electrical, industrial, and automotive maintenance Accepts K-, J-, T-, E-, R-, S-, and N-type thermocouples Dual-scale temperature readings range from -328 to 2,498 degrees F (-200 to 1,370 degrees C) Dual-input thermocouples for superheat and subcool applications, and cut-out and cut-in temperature measurements, and offset mode compensates for thermocouple error Built-in memory saves up to 16 sets of data with 1,024 data points, and datalogging saves up to 128 samples with real-time data