Pressure
Pressure measurement is the analysis of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area. Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure and display pressure in an integral unit are called pressure meters or pressure gauges or vacuum gauges. A manometer is a good example, as it uses the surface area and weight of a column of liquid to both measure and indicate pressure. Likewise the widely used Bourdon gauge is a mechanical device, which both measures and indicates and is probably the best known type of gauge. Pressure measurement and control is the most used process variable in the process control industry many segments. In addition, through the pressure it is possible infer a series of other process variables, like level, volume, flow and density. This will cover the main technologies of the most important technologies used in pressure sensors, as well as some details concerning pressure transmitter installations, market and trends.
