Construction and evaluation of a disposable pH sensor based on a large core plastic optical fiber

Rovati, Luigi; Fabbri, Paola; Ferrari, Luca; Pilati, Francesco
February 2011
Review of Scientific Instruments;Feb2011, Vol. 82 Issue 2, p023106
Academic Journal
The fabrication and characterization of a disposable optical fiber sensor for the detection of pH in the range 5-8 are described. The sensing element is a drop of sol-gel hybrid material containing phenol red and deposited onto the tip of a large core plastic optical fiber. This fiber is also exploited for the optical interrogation. This probe can be used as a disposable part of a measuring system. The dynamic range and temporal response of the sensor are here investigated.


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