This microprocessor-based, battery-operated thermometer monitors temperatures of furnaces, reactors, baths, appliances, and heating mantles. It can conveniently be hand-held or placed on a bench. The 4 digit, LCD display is easy to read, even in direct sunlight and has a backlit feature. Five buttons control On/Off, C/F scale, Hold, Min/Max and CAL for single point field calibration. Input is ANSI standard mini-connector, voltage protected. Thermocouples may be interchanged in seconds. Case is ABS/polycarbonate.