Wc. Michie et al., DISTRIBUTED SENSOR FOR WATER AND PH MEASUREMENTS USING FIBER OPTICS AND SWELLABLE POLYMERIC SYSTEMS, Optics letters, 20(1), 1995, pp. 103-105
We report on the design, construction and test of a generic form of se
nsor for making distributed measurements of a range of chemical parame
ters. The technique combines optical time-domain reflectometry with ch
emically sensitive water-swellable polymers (hydrogels). Initial exper
iments have concentrated on demonstrating a distributed water detector
; however, gels have been developed that enable this sensor to be read
ily adapted to distributed pH measurements.