Pressure sensor is a sensor used to measure pressure by converting it into an electrical signal. Its working principle is mainly based on the pressure deformation of the internal structure of the sensor, which causes changes in the internal circuit. The working principle of the pressure sensor is described in detail below.

      The basic structure of the pressure sensor includes an induction element, a signal processing circuit and a housing. The sensor is the core component of the pressure sensor, which is usually made of elastic materials, such as silicon, quartz, steel, etc. When external pressure is applied, the induction element will be deformed, and the degree of deformation is proportional to the size of the pressure.

      The deformation of induction element will cause the change of electrical parameters such as resistance, capacitance and inductance. Changes in these parameters can be measured and converted by signal processing circuits, resulting in an electrical signal that is proportional to the size of the pressure. The signal processing circuit usually consists of amplifiers, filters, analog-to-digital converters, etc. Their main role is to amplify, filter and digitize the weak signal output by the induction element, so as to facilitate subsequent data processing and analysis.

      The shell of the pressure sensor is usually made of stainless steel, aluminum alloy and other materials, and its main role is to protect the induction components and signal processing circuits from interference and damage from the external environment. The shell usually has waterproof, dustproof, corrosion resistance and other characteristics to adapt to a variety of different working environments.

     In short, the working principle of the pressure sensor is based on the deformation of the induction element to the pressure, which causes a change in the internal circuit, and the final output of the electrical signal is proportional to the size of the pressure. Pressure sensor is widely used in industrial automation, automotive industry, medical equipment and other fields, is an indispensable instrument in modern industrial production.