Patent ID: 7980137
Filing Date: 2011-07-19
Classification: G01F,G01L

Abstract:
1. A dual pressure sensor comprising: an airtight container having two through holes and having a pressure reference chamber formed on the inside thereof; and two pressure sensor units, disposed within the pressure reference chamber, for detecting two pressures to be measured; wherein: the two pressure sensor units each comprise: at least one substrate and at least one pressure-sensitive diaphragm chip for detecting respective pressures to be measured by converting into electrical signals displacements of diaphragms of the respective pressure-sensitive diagram chips due to the respective application of the pressures to be measured; and the at least one substrate of each individual pressure sensor unit comprises: a substrate main unit that has a small hole and has a connecting duct formed therein, and wherein the pressure-sensitive diaphragm chip is secured so as to block the small hole; and a pressure connecting portion, formed integrally with the substrate main unit and protruding therefrom, having a pressure connecting hole for connecting to the connecting duct, wherein one end extends to the outside of the airtight container from the two through holes, to connect the individual pressure to be measured through the connecting duct to the diaphragm of the pressure-sensitive diaphragm chip; wherein the opposing side faces of each of the substrate main units are in contact with each other.