The JIS B7525-1997 standard specifies the design, performance requirements and test methods of Density specific gravity meters. Density specific gravity meters are precision instruments used to determine the Density and specific gravity of substances, and are widely used in Density measurement of liquid, solid and powder materials. The standard covers the structural design, working principle, scope of use and operational requirements of the instrument to ensure that it provides accurate Density measurement results in industrial and laboratory environments. Through this standard, users can ensure that the Density specific gravity meter used meets the international technical requirements, thereby improving the reliability and repeability of measurement results.