Pressure sensor having a sensor body arrangement including membrane and circuit arrangements

A pressure sensor for detecting the pressure of a fluid in a nominal working range, the pressure sensor having a sensor body that comprises at least one first body part and one second body part each having a first face and a second face opposite to one another,

• wherein the first body part and the second body part are joined together in such a way that the first face of the first body part faces the first face of the second body part, at a distance therefrom;
• wherein at least one of the first body part and the second body part includes a membrane portion, subject to elastic flexure or deformation towards the other one of the first body part and the second body part as a result of pressure of the fluid, the membrane portion defining at least part of the first face of the first body part or of the second body part;
• wherein the pressure sensor has a circuit arrangement supported by the sensor body, which comprises at least one first electrical circuit that extends at least in part at the membrane portion and is configured at least for detecting one said elastic flexure or deformation through at least one respective detection component in order to provide first information representative of a measurement of a pressure comprised in said nominal working range;
• wherein the first electrical circuit is associated to the first face of one of the first body part and the second body part, and the first face of the other one of the first body part and the second body part forms or has associated thereto at least one circuit element, prearranged for interacting with the first electrical circuit when one said elastic flexure or deformation of the membrane portion is of a degree at least equal to a substantially predetermined safety limit, to generate thereby second information or signaling representative of a pressure of the fluid which exceeds said nominal working range;
• wherein the at least one circuit element comprises an element made of electrically conductive material, such as a resistive material or a metal material or a material with high electrical conductivity, with which at least one part of the first electrical circuit comes into contact following upon one said elastic flexure or deformation of the membrane portion of a degree at least equal to said substantially predetermined limit.

A pressure sensor for detecting the pressure of a fluid in a nominal working range, the pressure sensor having a sensor body that comprises at least one first body part and one second body part each having a first face and a second face opposite to one another,

• wherein the first body part and the second body part are joined together in such a way that the first face of the first body part faces the first face of the second body part, at a distance therefrom;
• wherein at least one of the first body part and the second body part includes a membrane portion, subject to elastic flexure or deformation towards the other one of the first body part and the second body part as a result of pressure of the fluid, the membrane portion defining at least part of the first face of the first body part or of the second body part;
• wherein the pressure sensor has a circuit arrangement supported by the sensor body, which comprises at least one first electrical circuit that extends at least in part at the membrane portion and is configured at least for detecting one said elastic flexure or deformation through at least one respective detection component in order to provide first information representative of a measurement of a pressure comprised in said nominal working range;
• wherein the first electrical circuit is associated to the first face of one of the first body part and the second body part, and the first face of the other one of the first body part and the second body part forms or has associated thereto at least one circuit element, prearranged for interacting with the first electrical circuit when one said elastic flexure or deformation of the membrane portion is of a degree at least equal to a substantially predetermined safety limit, to generate thereby second information or signaling representative of a pressure of the fluid which exceeds said nominal working range;
• wherein the at least one circuit element comprises a first electrically conductive element that provides, together with at least one second electrically conductive element associated to the first face to which also the first electrical circuit is associated, a proximity or position detector, the proximity or position detector being configured for generating said second information or signaling even in absence of contact between the first electrically conductive element and the second electrically conductive element when one said elastic flexure or deformation of the membrane portion is of a degree at least equal to said substantially predetermined limit.