Fiber optic combustion pressure sensor with improved long-term r

Measuring and testing – Fluid pressure gauge – Diaphragm

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G01L 708

Patent

active

056000707

ABSTRACT:
A cup shaped diaphragm having varying thicknesses reduces stress on the diaphragm and increases reliability of a fiber optic diaphragm sensor. The hermetic seal between the optical fiber and the ferrule body is removed from proximity of the diaphragm and is located near the opposite end of the ferrule. The effects on the ferrule of overpressure on the diaphragm are controlled by angling a portion of the ferrule tip adjacent the diaphragm. A method of sealing and locating the optical fiber to the ferrule of the sensor is described.

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