The Amprobe TM45A is a portable, 3-1/2 digit, compact-sized digital thermometer designed for use with an external K-type thermocouple as temperature sensor. Temperature indication follows Reference emperature/Voltage tables N.I.S.T. Monograph 175 Revised to ITS-90 for K-type thermocouples. One K-type thermocouple is supplied with the thermometer.