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Proceedings Paper

Multi-point fiber optic hydrogen sensor system for detection of cryogenic leaks in aerospace applications
Author(s): Edgar A. Mendoza; Lothar U. Kempen; Anil Menon; Eugene Durets; Steve Pflanze; Robert A. Lieberman; Alex A. Kazemi
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Paper Abstract

This paper describes progress in the development of a multi-point fiber optic micro sensor (optrode) based on a hydrogen gas sensitive chemistry immobilized in an optically transparent porous substrate. The hydrogen sensitive chemistry is fully reversible and has demonstrated a response to hydrogen gas in the range of 0% to 10% with a resolution of 0. 1 % and a response time of ?5 seconds measured at a gas flow rate of 1 cc/mm. The optical signature of the optrode in the visible spectrum varies proportionally to the local hydrogen gas concentration. The multi-point hydrogen sensing system uses temperature compensated hydrogen optrodes mounted at the tip of optical fibers. The hydrogen optrodes are distributed at multiple locations along a fiber optic cable-based network. A multi-channel optoelectronic sensor readout unit monitors the hydrogen and temperature response of the individual optrodes in real time and communicates this information via a serial communication port to a remote laptop computer.

Paper Details

Date Published: 1 March 2001
PDF: 12 pages
Proc. SPIE 4204, Fiber Optic Sensor Technology II, (1 March 2001); doi: 10.1117/12.417403
Show Author Affiliations
Edgar A. Mendoza, Intelligent Optical Systems, Inc. (United States)
Lothar U. Kempen, Intelligent Optical Systems, Inc. (United States)
Anil Menon, Intelligent Optical Systems, Inc. (United States)
Eugene Durets, Intelligent Optical Systems, Inc. (United States)
Steve Pflanze, Intelligent Optical Systems, Inc. (United States)
Robert A. Lieberman, Intelligent Optical Systems, Inc. (United States)
Alex A. Kazemi, Boeing Co. (United States)


Published in SPIE Proceedings Vol. 4204:
Fiber Optic Sensor Technology II
Brian Culshaw; James A. Harrington; Michael A. Marcus; Mohammed Saad; Michael A. Marcus; Brian Culshaw, Editor(s)

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