Continuous-type long-ranged molten metal level measuring device and thermal system using multi-point temperature sensor

A molten metal level measuring device in a continuous molten metal level measuring device using temperature compensation, the molten metal level measuring device comprising:

• a cylindrical bobbin;
• a liquid level measuring part helically wound around an outer surface of the bobbin;
• a circular inner cylinder in which the bobbin and the liquid level measuring part are located and which seals the bobbin and the liquid level measuring part from the outside and has the same axial direction as the bobbin;
• a cylindrical protective tube in which the inner cylinder is located, and which has the same axial direction as the bobbin and has one open end;
• a plurality of thermocouples disposed extending in the axial direction in the space formed by the outer side of the inner cylinder and the inner side of the protective tube;
• and
• a control unit which controls the liquid level measuring part to measure a liquid level of the molten metal and outputs a corrected value of the liquid level measured from the liquid level measuring part on the basis of temperatures respectively measured by the plurality of thermocouples.