Based on the definition of physical chemistry, a melting point of a matter refers to the temperature  at which the matter changes from solid state to liquid state. In the field of organic chemistry,  melting point determination is an essential means to identify the nature of the matter, in addition to  an important method for purity determination. Thereby the melting point apparatus plays a  significant role in the chemical industry and pharmaceutical research, and is also a necessary  instrument for production of medicine, perfume, dye and other organic crystals.  The WRS-1C melting point apparatus adopts the technologies such as automatic photoelectric  detection, graphic lattice LCD, touch screen keys and so on, and has the functions like automatic  recording of the melting curve, automatic display of incipient melting and final melting and so on.  The accuracy platinum resistor is used as the temperature measuring element in the temperature  control system. The digital PID and PWM technologies are used to improve the accuracy and  reliability of melting pint measuring. Furthermore, the instrument also has functions of automatic  saving of operating parameters and measured results. Communication with the PC can be  performed through the USB port or the RS232 port. Moreover, the instrument adopts the capillary  specified by the pharmacopeia as a sample tube.

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