Patent ID: 7694572

Claim:
Pressure-measuring device, with a pressure-measuring cell ( 1 ′) which has a first coefficient of thermal expansion (α 1 ), a second housing ( 2 ) which surrounds the pressure-measuring cell ( 1 ′) in circumferential fashion and which has a second coefficient of thermal expansion (α 2 ) which is greater than that the first coefficient of thermal expansion (α 1 ), and an O-ring ( 5 ) which is positioned between the pressure-measuring cell ( 1 ′) and the second housing ( 2 ), wherein a third housing ( 3 ) is provided which surrounds both the pressure-measuring cell ( 1 ′) and the second housing ( 2 ) circumferentially and which has a third coefficient of thermal expansion (α 3 ) smaller than or equal to the first coefficient of thermal expansion (α 1 ).