21 - Summary of other measurements

Abstract

This chapter discusses about dimension measurement that includes the measurement of the length, width, and height of components, and also the depth of holes and slots. Rules and tapes are the simplest way of measuring larger dimensions. Callipers are generally used in situations where measurement of dimensions using a rule or tape is not accurate enough. Micrometers provide a means of measuring dimensions to high accuracy. The height of objects and the depth of holes, slots etc. are measured by the height gauge and depth gauge, respectively. Measurement of angles is one of the less common measurement requirements that instrumentation technologists are likely to meet. The only dimensional parameter not so far discussed where a measurement requirement sometimes exists is the flatness of the surface of a component. Volume measurement is required in its own fight, as well as being required as a necessary component in some techniques for the measurement and calibration of other quantities such as volume flow rate and viscosity. Viscosity measurement is important in many process industries. There are many industrial requirements for the measurement of the moisture content, which can be required in solids, liquids, or gases. Noise can arise from many sources in industrial and non-industrial environments. pH is a parameter that quantifies the level of acidity or akalinity in a chemical solution. Gas sensing and analysis is required in many applications. The primary role of gas sensing is in hazard monitoring to predict the onset of conditions where flammable gases are reaching dangerous concentrations.