Mass metrology is the science of measuring mass accurately and precisely. It involves the use of standardized weights and balances to ensure that measurements are consistent and reliable. This field is essential for various industries, including pharmaceuticals, manufacturing, and research, where accurate mass measurements are crucial for quality control and compliance with regulations. In mass metrology, the International System of Units (SI) defines the kilogram as the base unit of mass. Advances in technology, such as the development of electronic balances and mass comparators, have improved measurement techniques, allowing for greater accuracy and traceability to national and international standards.