Isolator system for a pressure transmitter
First Claim
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1. An isolator system for a pressure transmitter, the system comprising:
- a port internal to the transmitter;
a sensor tube connected to the port to fluidly connect a passageway through a transmitter body to a pressure sensor, the sensor tube including a first end disposed in the port, the first end having a first cross-sectional area, said first cross-sectional area being perpendicular to a longitudinal axis of the sensor tube; and
a fill tube internal to the transmitter, the fill tube connected to the port to fluidly connect to the passageway, the fill tube including a second end disposed in the port, the second end having a second cross-sectional area, said second cross-sectional area being perpendicular to a longitudinal axis of the fill tube, that is less than the first cross-sectional area of the sensor tube, wherein the first cross-sectional area is between 60% and 90% of a sum of the first cross-sectional area and the second cross-sectional area.
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Abstract
An isolator system for a pressure transmitter includes a port internal to the transmitter, a sensor tube, and a fill tube. The sensor tube is connected to the port to fluidly connect a passageway through a transmitter body to a pressure sensor. The sensor tube includes a first end disposed in the port. The first end has a first cross-sectional area. The fill tube is internal to the transmitter and connected to the port to fluidly connect to the passageway. The fill tube includes a second end disposed in the port. The second end of the fill tube has a second cross-sectional area that is less than the first cross-sectional area of the sensor tube.
9 Citations
18 Claims
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1. An isolator system for a pressure transmitter, the system comprising:
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a port internal to the transmitter; a sensor tube connected to the port to fluidly connect a passageway through a transmitter body to a pressure sensor, the sensor tube including a first end disposed in the port, the first end having a first cross-sectional area, said first cross-sectional area being perpendicular to a longitudinal axis of the sensor tube; and a fill tube internal to the transmitter, the fill tube connected to the port to fluidly connect to the passageway, the fill tube including a second end disposed in the port, the second end having a second cross-sectional area, said second cross-sectional area being perpendicular to a longitudinal axis of the fill tube, that is less than the first cross-sectional area of the sensor tube, wherein the first cross-sectional area is between 60% and 90% of a sum of the first cross-sectional area and the second cross-sectional area. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pressure transmitter comprising:
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a transmitter body including an isolator rim around a concavity that is fluidly connected to a port internal to the transmitter by way of a passageway through the transmitter body; an isolator diaphragm including a diaphragm rim sealed to the isolator rim; a pressure sensor fluidly connected to the passageway by a sensor tube, the sensor tube including a first end disposed in the port; a fill tube internal to the transmitter, the fill tube fluidly connected to the passageway and adapted to seal isolator liquid within the transmitter, the fill tube including a second end disposed in the port; isolator liquid within the sensor tube, the fill tube, the passageway, and the concavity between the isolator diaphragm and the transmitter body; wherein the first end of the sensor tube has a first cross-sectional area, said first cross-sectional area being perpendicular to a longitudinal axis of the sensor tube, the second end of the fill tube has a second cross-sectional area, said second cross-sectional area being perpendicular to a longitudinal axis of the fill tube, and the first cross-sectional area is greater than the second cross-sectional area, and wherein the first cross-sectional area is between 60% and 90% of a sum of the first cross-sectional area and the second cross-sectional area. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An isolator system for a pressure transmitter, the system comprising:
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an isolator rim around a concavity in a transmitter body, the concavity fluidly connected to a port internal to the transmitter through a passageway through the transmitter body; an isolator diaphragm including a diaphragm rim sealed to the isolator rim; a sensor tube fluidly connecting the passageway to a pressure sensor; a fill tube internal to the transmitter, the fill tube fluidly connected to the passageway; and isolator liquid filling the sensor tube, the fill tube, the passageway, and the concavity between the isolator diaphragm and the transmitter body;
the fill tube adapted to seal the isolator liquid within the transmitter;wherein the sensor tube includes a first end disposed in the port, the fill tube includes a second end disposed in the port, the first end of the sensor tube has a first cross-sectional area, said first cross-sectional area being perpendicular to the longitudinal axis of a sensor tube, the second end of the fill tube has a second cross-sectional area, said second cross-sectional area being perpendicular to a longitudinal axis of the fill tube, and the first cross-sectional area is greater than the second cross-sectional area, and wherein the first cross-sectional area is between 60% and 90% of a sum of the first cross-sectional area and the second cross-sectional area. - View Dependent Claims (16, 17, 18)
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Specification