Metrology is the science dedicated to the accurate measurement and determination of physical quantities and their corresponding units. It encompasses the theoretical principles and practical methods required to establish standards and ensure the traceability and reliability of measurements across diverse industrial, scientific, and commercial applications. This discipline develops the primary standards for various physical parameters, including dimensions, time intervals, temperature gradients, and electrical potential. Modern metrological practice relies on maintaining international consistency through complex calibration procedures and the careful application of fundamental physical constants. The advancement of metrology is critical for technological progress, enabling precise engineering, materials science research, and sophisticated diagnostic technologies.