This thermometer is built around a high-speed 16-bit embedded microprocessor. It incorporates an automatic calibration circuit and utilizes precision temperature sensors to measure the cold end temperature, with software calibration capabilities. Data acquisition is facilitated by a high-precision AD conversion chip, with a sampling period of 20ms, providing robust resistance to electromagnetic interference in the spatial domain. This thermometer is suitable for measuring solution temperatures in industries such as steelmaking, copper smelting, and cast iron production, as well as furnace slag temperatures.