PRESSURE TRANSMITTER WITH HYDROGEN GETTER
First Claim
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1. A process variable transmitter for measuring a pressure of a process fluid comprising:
- a sensor module;
at least one pressure inlet formed in the sensor module and coupleable to a process fluid related pressure;
an isolation diaphragm positioned at the at least one pressure inlet;
a pressure sensor spaced apart from the isolation diaphragm;
an isolation tube containing a fill fluid to convey the process fluid related pressure from the isolation diaphragm to the pressure sensor; and
hydrogen getter material positioned in contact with the fill fluid between the isolation diaphragm and the pressure sensor to remove hydrogen from the fill fluid.
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Abstract
A process variable transmitter for measuring a pressure of a process fluid includes a sensor module, a pressure inlet formed in the sensor module, an isolation diaphragm positioned in the pressure inlet, a pressure sensor and an isolation tube containing a fill fluid to convey a process fluid related pressure from the isolation diaphragm to the pressure sensor. A hydrogen getter material is positioned in contact with the fill fluid between the isolation diaphragm and the pressure sensor to remove hydrogen from the fill fluid.
12 Citations
17 Claims
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1. A process variable transmitter for measuring a pressure of a process fluid comprising:
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a sensor module; at least one pressure inlet formed in the sensor module and coupleable to a process fluid related pressure; an isolation diaphragm positioned at the at least one pressure inlet; a pressure sensor spaced apart from the isolation diaphragm; an isolation tube containing a fill fluid to convey the process fluid related pressure from the isolation diaphragm to the pressure sensor; and hydrogen getter material positioned in contact with the fill fluid between the isolation diaphragm and the pressure sensor to remove hydrogen from the fill fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of maintaining a fill fluid in a process variable transmitter having a sensor module, a pressure inlet formed in the sensor module, an isolation diaphragm positioned in the pressure inlet, a pressure sensor and an isolation tube containing a fill fluid to convey a process fluid related pressure from the isolation diaphragm to the pressure sensor, the method comprising:
- placing a hydrogen getter material in contact with the fill fluid between the isolation diaphragm and the pressure sensor to remove hydrogen from the fill fluid.
- View Dependent Claims (13, 14, 15, 16, 17)
Specification