Pressure sensor assembly for measuring absolute pressure
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United States of America Patent
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Apr 20, 2010
Grant Date -
Oct 8, 2009
app pub date -
Apr 4, 2008
filing date -
Apr 4, 2008
priority date (Note) -
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Abstract
An absolute pressure transducer for outputting a signal indicative of an absolute pressure of a process to be measured is provided. The pressure transducer consists of a pressure-tight pressure port, which is connectable to the process, a housing accommodating pressure sensors and a common circuit board, a first pressure sensor, which analogically detects a difference between the process pressure and an ambient pressure inside the housing, a second pressure sensor, which detects the ambient pressure inside the housing as an absolute pressure, and the common circuit board, which is connected to both the first pressure sensor and the second pressure sensor and furthermore has a data processing unit. Here, the second pressure sensor is adapted to issue an electronic signal indicative of the ambient pressure. The circuit board converts the analogically detected pressure difference into a digital signal, determines the absolute pressure of the process based on the signals from the first and second pressure sensors and outputs a signal indicative of the absolute pressure of the process.
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