It adopts photoelectric automatic detection, dot matrix graphic LCD display, touch screen buttons and other technologies, with automatic recording of melting curve, automatic display of initial melting and final melting, etc. The temperature control system uses precision platinum resistance as the temperature detection element, and uses digital PID adjustment and PWM temperature control technology to improve the accuracy and reliability of the melting point determination. The instrument has the function of automatically saving working parameters and storing measurement results, and it can also establish communication with a PC through a USB interface or RS232 interface. The instrument uses the capillary specified in the Pharmacopoeia as the sample tube. Melting point measurement range: room temperature～400℃ "Starting temperature" setting time: 50℃～400℃ not more than 5min 400℃～50℃ not more than 7min The minimum value of temperature digital display: 0.1℃ Linear heating rate: 0.1℃/min -20.0℃/min can be continuously selected .Accuracy of determining melting point: 200℃ or below range: ±0.4℃ Range above 200°C: ±0.7°C Repeatability: 0.3°C Standard capillary size: outer diameter Φ1.4mm inner diameter Φ1.0mm Sample filling height: 3mm Communication interface: USB or RS232 serial interface is selected by touch screen buttons Power supply: 220V±22V, 50Hz, 100W Instrument size: 360mm×290mm×170mm Net weight of the instrument: 10kg