Measuring and testing – Fluid pressure gauge – Mounting and connection
Patent
1996-01-16
1997-04-29
Chilcot, Richard
Measuring and testing
Fluid pressure gauge
Mounting and connection
73724, G01L 700, G01L 912
Patent
active
056251521
ABSTRACT:
The disclosed heated pressure transducer includes an external enclosure, a first thermal shell housed within the external enclosure, and a sensor housed within the first thermal shell. The transducer further includes a heater for heating the first thermal shell and a control unit for controlling the heater. A tube couples the sensor to a source of heated, pressurized gas and the transducer may further include a tube-heater that is controlled by the control unit for applying heat to the tube. The transducer may also include a second thermal shell housed within the external enclosure with at least a portion of the control unit being housed within the second thermal shell. A heater that is controlled by the control unit may be disposed proximal to the second thermal shell for heating that shell. An auxiliary heater disposed within the first thermal shell for heating the sensor may also be included. Two thermistors may also be included for measuring the temperature of the sensor and the first thermal shell.
REFERENCES:
patent: 4084439 (1978-04-01), Teter et al.
patent: 4176557 (1979-12-01), Johnston
patent: 4738276 (1988-04-01), Adams
patent: 5271277 (1993-12-01), Pandorf
Blankenship Steven D.
DeMone Archibald J.
Pandorf Robert C.
Thomas Frank W.
Chilcot Richard
Felber Joseph L.
MKS Instruments Inc.
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