Capacitive pressure sensor housing having a ceramic base
First Claim
1. A capacitive pressure sensor capsule comprising:
- a housing having a ceramic cover sealingly attached to a ceramic base to define an interior chamber, said housing further including an inlet port in fluid communication with a source of fluid pressure to be measured and said chamber, and further having a pillar member extending into said chamber;
a glass sensor attached to said pillar member and disposed in said chamber; and
at least one conducting member extending from said sensor and through said pillar member and into said housing.
1 Assignment
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Accused Products
Abstract
A capacitive pressure sensor capsule has a housing with a ceramic cover sealingly attached to a ceramic base that defines an interior chamber. The sensing medium enters the chamber through an inlet port. A glass sensor is attached to an integral pillar that extends from the housing into the chamber. A conducting member extends through the pillar into the housing and carries the signals from the sensor. The combination of the glass sensor and ceramic housing provides high accuracy over a wide range of temperature, because the thermal coefficient of expansion of glass and ceramic are similar. Hermetic sealing of the sensor electrical circuitry ensures long term immunity from the sensed environment.
46 Citations
30 Claims
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1. A capacitive pressure sensor capsule comprising:
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a housing having a ceramic cover sealingly attached to a ceramic base to define an interior chamber, said housing further including an inlet port in fluid communication with a source of fluid pressure to be measured and said chamber, and further having a pillar member extending into said chamber; a glass sensor attached to said pillar member and disposed in said chamber; and at least one conducting member extending from said sensor and through said pillar member and into said housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A capacitive pressure sensor capsule comprising:
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a housing having a metal cover sealingly attached to a ceramic base to define an interior chamber, said housing further including an inlet port in fluid communication with a source of fluid pressure to be measured and said chamber, and further having a pillar member extending into said chamber; a glass sensor attached to said pillar member and disposed in said chamber; and at least one conducting member extending from said sensor and through said pillar member and into said housing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A capacitive pressure sensor capsule comprising:
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a housing having a polymer cover sealingly attached to a ceramic base to define an interior chamber, said housing further including an inlet port in fluid communication with a source of fluid pressure to be measured and said chamber, and further having a pillar member extending into said chamber; a glass sensor attached to said pillar member and disposed in said chamber; and at least one conducting member extending from said sensor and through said pillar member and into said housing. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification