An Introduction to Metrology

Metrology is the art of precision measurement – more specifically the scientific study of measurement, including both theoretical and practical aspects. Agreed units and standards within the world of metrology is extremely important as this shows us whether the results given have the correctness and accuracy that is required.

There are many things that can affect your measurements, and these can be shown using an uncertainty of measurement. The National Physical Laboratory states that “Measurement uncertainties can come from the measuring instrument, from the item being measured, from the environment, from the operator, and from other sources”. This can include factors such as temperature, the equipment used becoming dated or the part being measured being distorted during transportation etc.

Mastering the art of precision measurement is a science. Metrology is particularly important in industries that involve manufacturing to very tight tolerances in order for manufactured parts to fit together correctly. An example of this is in aeroplane engines – each individual component of the engine has to fit together in such a way that it makes the process somewhat seamless, with bolt holes falling in line with other components at exactly the right place so that the final product doesn’t fail when tested in a high pressure environment.

To conclude, metrology is mostly interested in:

1, Establishing the units of measurements
2, Reproducing the units to ensure reliability
3, Developing methods of measurement to make the process more accurate
4, Analysing the accuracy of methods of measurement and establishing uncertainty of measurement
5, Researching into the causes of measuring errors, and eliminating them to the best ability


Eley Metrology are a UKAS Accredited Laboratory that adheres to the standards set by the relevant governing bodies. Eley provide measurement solutions no matter how small the requirement and can build entirely custom machines to suit any work space or size necessary, all without the need for error-mapping due to manufacturing excellence. Get in touch today on 01332 367475 to discuss any requirements you may have.