Sensor with fluid isolation barrier
First Claim
Patent Images
1. A sensor capsule, comprising:
- a block that has a sensor mounting hole with a sensor mounting hole length extending from a first outer block surface into a pressure chamber in the block;
the block further having a fluid inlet hole extending from a second outer block surface into the pressure chamber;
the block comprising two half-blocks joined along mating surfaces passing lengthwise through the sensor mounting hole;
a sensor that has a sensor neck passing through and being surrounded by the sensor mounting hole, a fluid sensing surface suspended in the pressure chamber and electrical sensor connections outside the pressure chamber;
the sensor neck being separated from the sensor mounting hole by a gap that extends in a continuous path around the sensor neck; and
a sensor braze joint that fills the gap to join the sensor neck to the sensor mounting hole.
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Accused Products
Abstract
A sensor capsule suitable for use in an industrial process fluid transmitter. The sensor capsule includes a block that has a sensor mounting hole. The block includes two half-blocks joined along mating surfaces passing lengthwise through the sensor mounting hole. A sensor has a sensor neck passing through the sensor mounting hole. The sensor neck is sealed to the sensor mounting hole.
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Citations
20 Claims
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1. A sensor capsule, comprising:
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a block that has a sensor mounting hole with a sensor mounting hole length extending from a first outer block surface into a pressure chamber in the block;
the block further having a fluid inlet hole extending from a second outer block surface into the pressure chamber;
the block comprising two half-blocks joined along mating surfaces passing lengthwise through the sensor mounting hole;
a sensor that has a sensor neck passing through and being surrounded by the sensor mounting hole, a fluid sensing surface suspended in the pressure chamber and electrical sensor connections outside the pressure chamber;
the sensor neck being separated from the sensor mounting hole by a gap that extends in a continuous path around the sensor neck; and
a sensor braze joint that fills the gap to join the sensor neck to the sensor mounting hole. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A sensor capsule, comprising:
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a block that has a sensor mounting hole with a sensor mounting hole length extending from a first outer block surface into a pressure chamber in the block;
the block further having a fluid inlet hole extending from a second outer block surface into the pressure chamber;
the block comprising two half-blocks joined along mating surfaces passing lengthwise through the sensor mounting hole;
a sensor that has a sensor neck passing through and being surrounded by the sensor mounting hole, a fluid sensing surface suspended in the pressure chamber and electrical sensor connections outside the pressure chamber;
the sensor neck being separated from the sensor mounting hole by a gap that extends in a continuous path around the sensor neck; and
a sealing compound that fills the gap to join the sensor neck to the sensor mounting hole. - View Dependent Claims (20)
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Specification