A pressure sensor is a device or instrument which is able to measure the pressure in gases or liquids. A pressure sensor consists of a pressure-sensitive element which can determine the pressure being applied and components to convert the information into an output signal. A pressure sensor works by converting pressure into an analogue electrical signal. The demand for pressure measuring instruments increased during the steam age.
There are seven main types of pressure sensors: Aneroid barometer pressure sensors, manometer pressure sensors, bourdon tube pressure sensors, vacuum (Pirani) pressure sensors, sealed pressure sensors, piezoelectric pressure sensors, and strain gauge pressure sensors. Pressure sensors are increasingly used in applications such as bottle and equipment leak detection, Variable Air Volume (VAV) systems, air blades, compressed air pressure monitoring, industrial flow monitoring, filter pressure monitoring, duct airflow, gas detection, pneumatic controls, mine safety instrumentation, .
Pressure sensors are used for many automotive, medical, industrial, consumer and building devices, which depend on accurate and stable pressure measurements in order to operate reliably. The typical pressure sensor has three functional blocks. Figure 9. The basic pressure sensing element can be configured as a C-shaped Bourdon tube (A); a helical Bourdon tube (B); flat diaphragm (C); a convoluted diaphragm (D); a capsule (E); or a set of bellows (F).
