Pressure sensors, also known as pressure transducers are devices equipped with a pressure-sensitive element which measure the pressure of a liquid or gas against a diaphragm-like structure made out of steel, silicon, etc., and alters the measured value into an analog electrical signal as a result.The term pressure is used to show the amount of force that is needed to stop a fluid from expanding, and it termed in terms of force per unit area. The transition of pressure into electrical signal is accomplished by a physical distortion of strain gages which are adhered into the diaphragm of the pressure sensor and wired into a wheatstone bridge configuration. When the pressure is applied to the pressure sensor, a refraction of diaphragm acquaints strain to the gages. The strain will generate an electrical resistance alter proportional to the pressure. Research on pressure sensors market states that these sensors are used in many systems to determine other factors such as gas/fluid flow, speed, water level, and altitude. These sensors have some significant application in various industries, for example, automotive, healthcare and electronics.

Pressure sensors are segmented in terms of their pressure ranges with which they are measured; temperature ranges of function, and the type of pressure they measure. They are diversely named depending upon their purpose; however, the same technology might not be used under different names.

Gauge pressure sensor – this sensor measures the pressure proportional to atmospheric pressure. A tire pressure gauge is an example of gauge pressure measurement. When the sensor hits zero, the pressure it measures is te same as the ambient pressure.

Absolute pressure sensor –this pressure sensors help is measuring the pressure relative to perfect vacuum.

Sealed pressure sensor –very similar to gauge pressure sensor, expect this sensor measures pressure relative to fixed pressure as compared to ambient atmospheric pressure.

Vacuum pressure sensor – this variant is mostly used to describe a sensor which measures low pressure relative to perfect vacuum, which is absolute pressure.

Differential pressure sensor – this pressure sensor measures the difference between two pressures, one linked to each side of the sensor.  This sensor is used to measure several properties, such as pressure drops across oil filters and/or air filters, fluid levels and flow rates.

The sensors generally play a transducer and given out electrical signals, and with improved technologies in several industries, the functionalities and applications of pressure sensors are continuously and progressively evolving. Presently, pressure sensors are making use of digital technology for providing enhanced sensory performance and efficacy.