Science relies on the ability of scientists to make precise measurements, but just as one can use a calculator without a thorough understanding of how mathematics work, scientists are not generally tasked with having a thorough understanding of the underpinning principles of the instruments they use. The equipment a scientist uses requires precise voltages to work, for example, but the user need not understand electrical theory to use it as intended. Metrology is the branch of science which seeks to understand these concepts and correctly apply them to various tasks; the people who work in the discipline are called metrologists.
The metrologist may be thought of as a scientist of measure, for their major job duties revolve around maximizing the precision and proper calibration of tools used to make or govern measurement. Metrologists, in general, deal with the understanding of physical qualities and how to properly quantify them. Since there are countless types of things to measure, metrologists may apply their efforts in a multitude of ways in tasks involving electronics, meteorology, biology, and physical sciences. In addition to developing the methods and tools of proper measurement, metrologists may also direct or supervise engineering teams to ensure that the products make the measurements as they are supposed to. Metrologists in this capacity may travel if they have many teams to supervise, but many metrologists spend most of their time in a laboratory setting.
There are courses available in metrology, both inside and outside of traditional education, although exploration into other areas of the physical sciences is strongly encouraged for prospective metrologists who wish to specialize. A bachelor's degree in a relevant scientific discipline is a minimum requirement for most employers, and there are certification programs available that may be beneficial.
Develop, perform, evaluate and interpret analytic methods and tests.
Select and order components, parts and tools.
Own quality investigation and calibration documentation.
Review and maintain equipment, preventing work stoppages.
Service and calibrate equipment, verify results and troubleshoot problems.