In science and engineering, a dimensional gauge or simply gauge is a device used to make measurements or to display certain dimensional information. A wide variety of tools exist which serve such functions, ranging from simple pieces of material against which sizes can be measured to complex pieces of machinery. Gauges are used to measure different types of objects having various sizes, shapes, and thicknesses, the gap in space, diameter of materials, or pressure of the flow. Specific types of gauges are used to measure each parameter.
