Measuring device and method of physical property measuring

A method of physical property measuring comprising:

• providing a draining vessel and recording a vessel information of the draining vessel;
• placing metal to be measured in the draining vessel;
• heating the metal to be measured to melt it into molten metal fluid;
• making the molten metal fluid flow out of the draining vessel and be accumulated in a loader during a time period to obtain a weight of the molten metal fluid;
• providing an assumed physical parameters of the molten metal fluid;
• transforming the weight of the molten metal fluid in the loader into a first length criterion in the draining vessel by a transform unit according to the assumed physical parameters of the molten metal fluid and the vessel information;
• simulating flowing of the molten metal fluid by the assumed physical parameters of the molten metal fluid to have a second length criterion in the draining vessel by a computing unit according to the assumed physical parameters of the molten metal fluid and the vessel information;
• computing a difference function formed by the difference of the first and second length criterions;
• and
• minimizing the difference function by a processor, wherein current physical parameters of the assumed physical parameters of the molten metal fluid are selected as physical properties of the molten metal fluid when the difference function is minimized.