The melting point of the crystalline material is measured to determine its purity. Mainly used for the determination of the melting point of crystalline organic compounds such as drugs, dyes, perfumes, etc. Adopt photoelectric automatic detection, dot-matrix image liquid crystal display and other technologies, and digital keyboard input. It can hold three samples at the same time, and has the functions of automatic display of initial melting and final melting, automatic recording of melting curve, and automatic calculation of the average value of melting point. The temperature system uses a platinum resistance with high linearity as the detection element, and uses PID adjustment technology to improve the accuracy and reliability of the melting point. The instrument establishes communication with the PC through USB or RS232, prints or saves the curve, and the instrument uses the capillary specified in the Pharmacopoeia as Sample tube. Melting point measurement range: room temperature -300℃ "Initial temperature" setting time: 50℃ -300℃ ≤6min 300℃ -50℃ ≤7min The minimum value of temperature digital display: 0.1℃ Linear heating rate: 0.2℃/min, 0.5℃/min, 1℃/min, 1.5℃/min, 2℃/min, 3℃/min, 4℃/min, 5℃/min eight levels Linear heating rate error: not more than 10% of the nominal value Indication error: ≤200 ℃: ±0.4 ℃ ＞200℃: ±0.7 ℃ Repeatability of indication: when the heating rate is 1.0℃/min, 0.3 ℃ Standard capillary size: outer diameter Φ1.4mm inner diameter Φ1.0mm length 80mm Sample filling height: ≥3mm Communication interface: USB or RS232 is selected by the button Power supply: AC220V±22V, 100W, 50Hz Instrument size: 365mm x 290mm x 176mm Net weight of the instrument: 10kg