Importance

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Abstract

A pressure sensing device adapted to measure pressure of a fluid includes a body member made of an inert material that does not react chemically with the fluid. A thin wall diaphragm section integral with the body member carries on its exterior surface a sensor that provides a signal proportionate to the pressure of the fluid within body member. The sensor device has an exterior surface with a bridge resistor circuit mounted thereon. The cross-sectional configurations of the sensor device and the thin wall diaphragm section are complimentary so their mating surfaces fit snugly together. A liner member made of an inert material that does not react chemically with the fluid fits within the body member adjacent the first thin wall diaphragm section and includes a second thin wall diaphragm section integral with the liner member. The second thin wall diaphragm section has an exterior surface of a shape that conforms to the interior surface of the first thin wall diaphragm section and abuts and covers substantially the entire interior surface of the first thin wall diaphragm.

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First Claim