Static pressure tube apparatus, method, and system

Details Static pressure tube apparatus, method, and system Static pressure tube apparatus, method, and system

2006-05-26

2008-08-05

Thompson, Jewel V (Department: 2855)

Measuring and testing

Volume or rate of flow

Using differential pressure

Reexamination Certificate

active

07406879

ABSTRACT:
An apparatus, system, and method for measuring static pressure in a warm gas flow while minimizing particulate deposit formation includes a housing containing the flow of gas, a pressure sensor, and a heated pressure sampling tube attached to the sensor, with the tube sampling the gas flow. The heated sampling tube reduces the temperature gradient between the gas and the tube, reducing thermophoretic forces that contribute to deposit formation. The sampling tube extends through the housing into the gas flow in one embodiment, enabling the gas to heat the tube and locating the open end of the tube in a higher-flow area of the gas, further reducing deposit formation.

REFERENCES:
patent: 3553403 (1971-01-01), Porwancher
patent: 4196849 (1980-04-01), Dehart et al.
patent: 4592239 (1986-06-01), Cutler
patent: 4744670 (1988-05-01), Janssen
patent: 6435166 (2002-08-01), Sato et al.

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