Accession Number : ADD017346

Title :   Optical Fiber Pressure Sensor for Liquid Level Monitoring.

Descriptive Note : Patent, Filed 22 Feb 94, patented 6 Dec 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Cuomo, Frank W

Report Date : 06 Dec 1994

Pagination or Media Count : 7

Abstract : An apparatus for continuously monitoring changes in a liquid level in accordance with a differential pressure is provided. A sensor body immersed in the liquid supports two thin-filmed metallic diaphragms that are independently axially responsive to pressure of the liquid. Each diaphragm has a different modulus of elasticity Two fiber optic pressure sensors are mounted within an air space encased by the sensor body in combination with the two diaphragms. Each of the two fiber optic pressure sensors detects the axial response of one of the two diaphragms. The displacement difference between the two diaphragms is an indication of differential pressure related to the liquid level. (AN)

Descriptors :   *FIBER OPTICS, *PRESSURE GAGES, *PATENTS, PRESSURE GRADIENTS, MONITORING, PRESSURE TRANSDUCERS, DISPLACEMENT, THIN FILMS, PASSIVE SYSTEMS, AIR SPACE, STATIC PRESSURE, LIQUID LEVEL GAGES

Subject Categories : Fiber Optics and Integrated Optics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE