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Journal of Sensors
Volume 2012, Article ID 709849, 5 pages
Research Article

Plastic Optical Fiber Sensing of Alcohol Concentration in Liquors

Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan

Received 1 December 2011; Revised 30 January 2012; Accepted 2 February 2012

Academic Editor: Wolfgang Ecke

Copyright © 2012 Masayuki Morisawa and Shinzo Muto. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A simple optical fiber sensing system of alcohol concentration in liquors has been studied. In this sensor head, a mixture polymer of novolac resin and polyvinylidenefluoride (PVDF) with a ratio of 9 : 1 was coated as a sensitive cladding layer on the plastic fiber core made of polystyrene-(PS-)coated polycarbonate (PC). Using this sensor head and a green LED light source, it was confirmed that alcohol concentration in several kinds of liquors from beer to whisky can easily be measured with a fast response time less than 1 minute.