Patent ID: 7124638

Claim:
A pressure sensor for detecting an effective pressure, comprising: a first pressure detection means for providing a first pressure measurement signal, which depends on the effective pressure and has a first dependence on an interference; a second pressure detection means for providing a second pressure measurement signal, which depends on the effective pressure and has a second dependence on the interference, which differs from the first dependence; and an evaluation means for determining the effective pressure based on the first and second pressure measurement signals, the first interference dependence and the second interference dependence, wherein the first pressure detection means has a first membrane and the second pressure detection means has a second membrane; wherein the first pressure detection means is formed to provide the first pressure measurement signal based on a deformation of the first membrane, wherein the second pressure detection means is formed to provide the second pressure measurement signal based on a deformation of the second membrane, wherein a first elastic material of a first density is disposed over the first membrane, and wherein a second elastic material of a second density is disposed over the second membrane, wherein the first dependence depends on a thickness of the first elastic material and the first density and wherein the second dependence depends on a thickness of the second elastic material and the second density; and wherein the first density is different from the second density and/or the thickness of the first elastic material is different from the thickness of the second elastic material.