the use of advanced technology of electromagnetic sensor, so as to ensure that the machine test data accuracy, repeatability is good. 2, the machine is a multi-purpose machine that can test the specific gravity of solid, liquid value, and meet as 1/10000 electronic balance use. 3. The large sink, plastic sink and glass are adopted to effectively reduce the error of lifting bar caused by rising liquid. The specific gravity of solid block, particle and film can be tested quickly and accurately. The machine design is simple and practical, accurate data, specific gravity/density direct reading, only one or two steps to read the data directly, without special training can be skilled in operation.