The UC series heating circulator can achieve rapid temperature rise and fall from 50 to 300 °C. Equipped with a heating and cooling integrated container, the heat exchange area is large, the heating and cooling rates are fast, and the demand for heat transfer oil is relatively small, saving energy. The whole system is fully enclosed, no oil mist volatilizes at high temperature, and the heat transfer oil will not be oxidized. The device has the function of correcting the internal circulation temperature probe PT100. The system has an expansion vessel, which is adiabatic from the liquid circulation and does not participate in the liquid circulation.