Patent ID: 6510741
Filing Date: 2003-01-28
Classification: G01L

Abstract:
A manometer for measuring fluid pressure, said manometer including:a first pressure sensor including a first housing, a first fluid chamber, a second fluid chamber, a first pressure sensor chip located in said first housing, said first pressure sensor chip including a first diaphragm having an interior surface in fluid communication with said first fluid chamber and an exterior surface in fluid communication with said second fluid chamber, said first diaphragm being located in a first plane, a first port in fluid communication with said first fluid chamber, a second port in fluid communication with said second fluid chamber, and a plurality of electrical contacts in electrical communication with said first pressure sensor chip, said first pressure sensor adapted to provide a first electrical output signal representing a fluid pressure measured by said first diaphragm; a second pressure sensor including a second housing, a first fluid chamber, a second fluid chamber, a second pressure sensor chip located in said second housing, said second pressure sensor chip including a second diaphragm having an interior surface in fluid communication with said first fluid chamber and an exterior surface in fluid communication with said second fluid chamber of said second pressure sensor, said second diaphragm being located in a second plane, a first port in fluid communication with said first fluid chamber and a second port in fluid communication with said second fluid chamber of said second pressure sensor, and a plurality of electrical contacts in electrical communication with said second pressure sensor chip, said first port of said first pressure sensor and said first port of said second pressure sensor adapted to be placed in fluid communication with a first source of fluid pressure, and said second port of said first pressure sensor and said second port of said second pressure sensor adapted to be placed in fluid communication with a second source of fluid pressure, said second pressure sensor being inverted with respect to said first pressure sensor with said second plane being generally parallel to said first plane, said second pressure sensor adapted to provide a second electrical output signal representing a fluid pressure measured by said second diaphragm; whereby said second electrical output signal is adapted to be combined with said first electrical output signal to correct changes in the first electrical output signal caused by movement of said manometer such that the combined electrical output signal provides an accurate indication of fluid pressure.