National Physical Laboratory

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Guides
NPL guides aim to improve measurement understanding and technical abilities across the UK and the rest of the world.

Latest guides

 

GPG 149: Care and Use of Gauge Blocks front cover Care and Use of Gauge Blocks

Written for those new to using gauge blocks, or for more experienced users who would like to refresh their knowledge, this guide outlines some of the best practices for handling, inspecting, cleaning and storing gauge blocks. Readers will also learn how to determine which gauge blocks to use, how to wring them and some basics of gauge block calibration.

GPG 141: The Use of Focused Ion Beam Microscopy for 3D Material Characterisation front cover The Use of Focused Ion Beam Microscopy for 3D Material Characterisation

This guide to using dual-beam microscopes for materials characterisation has two main objectives: to provide a description of the principles behind electron-solid and ion-solid interactions, including guidelines on how to achieve optimal imaging conditions; and to provide procedures for the set-up of 3D data acquisition and image reconstruction.

GPG 138: Strategic Planning for Coordinate Metrology front cover Strategic Planning for Coordinate Metrology

Designed for those who require to strategically plan for coordinate metrology, this Good Practice Guide provides an introduction to coordinate metrology. The guide was written in collaboration with the Coordinate Metrology Society and was distributed at the 32nd Coordinate Metrology Society Conference in Nashville, Tennessee, in July 2016.

GPG 140: Guide to Weighing in Vacuum front cover Guide to Weighing in Vacuum

An expert-level guide describing the establishment of weighing-in-vacuum facilities and methodologies to achieve traceability from the realisation of the kilogram in vacuum, to weights stored and used in air.

GPG 139: Guide to the Storage of Primary Mass Standards front cover Guide to the Storage of Primary Mass Standards

An expert-level guide for measurement experts presenting information that will assist with the maintenance of the SI unit of mass at National Measurement institutes.

GPG 125 Introduction to Temperature Measurement

This guide is an updated version of a previous Good Practice Guide. It is aimed at beginners with some scientific knowledge, explains the fundamental concepts underpinning temperature measurement and gives practical advice on the techniques available.

Featured

A beginner's guide to Measurement in Electronic and Electrical Engineering Beginner's Guide to Measurement in Electronic and Electrical Engineering

NPL and the Institution of Engineering and Technology have jointly produced a beginner's guide to measurement for electronic and electrical engineering students.

GPG 133: Good Practice Guide for Underwater Noise Measurement Good Practice Guide for Underwater Noise Measurement

A guide designed for those making in-situ measurements of underwater sound, such as oil and gas companies, and developers of marine renewable energy.

A beginner's guide to humidity measurement Beginner's Guide to Measurement in Mechanical Engineering

NPL and the Institution of Mechanical Engineers have jointly produced a guide to measurement aimed at mechanical engineering students.

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Beginner's guides

The following guides to measurement and uncertainty provide introductions to basic measurement concepts to get yourself started in the world of measurement.

Beginner's guide to uncertainty in measurement

Beginner's guide to measurement

Beginner's guide to measurement in electronic and electrical engineering

Beginner's guide to measurement in mechanical engineering

Introduction to Temperature Measurement

Explore the wonderful world of measurement with NPL e-Learning

Collaborative guides

NPL collaborates with other organisations to produce a range of guides.

Guide to the Measurement of Humidity

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