Fundamentals of Metrology

Metrology [from Ancient Greek metron (measure) and logos (study of)] is the science of measurement. Metrology includes all theoretical and practical aspects of measurement. Metrology is concerned with the establishment reproduction conservation and transfer of units of measurement & their standards.For engineering purposes metrology is restricted to measurements of length and angle & quantities which are expressed in linear or angular terms. Measurement is a process of comparing quantitatively an unknown magnitude with a predefined standard