Table of Contents
Introduction
The physical quantity
Working principle
Pressure sensors types
Sensor characteristics
Applications
References
The physical quantity
Static pressure is the ratio of the perpendicular element of force to the element of surface it is exerted on.
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p = nkBT/V , where n, T and V are respectfully the number of molecules, the temperature and the volume of the gas, and kB is the Boltzmann constant
Working principle
The majority of pressure sensors do not measure the pressure directly. Being a composite sensor, it consists of a sensing element that takes a primary reading (most commonly deformation followed by displacement, force or strain) and translates it to another non-electric physical quantity. Another sensor then translates this into an electrical signal that represents the output of the pressure sensor.
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