Luminescent fiber optic sensor for the measurement of pH

Charles Milo; Beauford W. Atwater

doi:10.1117/12.143519

30 April 1993 Luminescent fiber optic sensor for the measurement of pH

Charles Milo, Beauford W. Atwater

Proceedings Volume 1796, Chemical, Biochemical, and Environmental Fiber Sensors IV; (1993) https://doi.org/10.1117/12.143519
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

The fiber optic pH sensor described is based on a colorimetric pH indicator and a pH insensitive luminescent compound co-immobilized in a hydrophilic polymer. The absorption spectra of the pH indicator and the luminescent compound overlap. Consequently, the competitive absorption between the pH indicator and the luminescent compound results in modulation of the sensor emission intensity as a function of pH in the measurement media. The feasibility of this pH measurement technique is demonstrated with on-line testing of fiber optic sensors.

Citation Download Citation

Charles Milo and Beauford W. Atwater "Luminescent fiber optic sensor for the measurement of pH", Proc. SPIE 1796, Chemical, Biochemical, and Environmental Fiber Sensors IV, (30 April 1993); https://doi.org/10.1117/12.143519

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