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Distributed sensor for water and pH measurements using fiber optics and swellable polymeric systems

W. C. Michie, B. Culshaw, I. McKenzie, M. Konstantakis, N. B. Graham, C. Moran, F. Santos, E. Bergqvist, and B. Carlstrom

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Abstract

We report on the design, construction and test of a generic form of sensor for making distributed measurements of a range of chemical parameters. The technique combines optical time-domain reflectometry with chemically sensitive water-swellable polymers (hydrogels). Initial experiments have concentrated on demonstrating a distributed water detector; however, gels have been developed that enable this sensor to be readily adapted to distributed pH measurements.

© 1995 Optical Society of America

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