Sensors & Transducers Journal
(ISSN 1726- 5479)
Sensors & Transducers Journal 2006 2000-2002 S&T e-Digest Contents
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Vol. 84, Issue 10, October 2007, pp.1633-1640
A Comparative Study of Fiber Optic Humidity Sensors Based on Chitosan and Agarose
*Jinesh Mathew, K. J. Thomas, V. P. N. Nampoori and P. Radhakrishnan
International School of Photonics,
Cochin University of Science and Technology,
Cochin-22, Kerala, India
Tel.: +91 4842575848, fax: +91 4842576714
*E-mail: jineshtmathew@gmail.com, http://www.photonics.cusat.edu
Received: 18 September 2007 /Accepted: 23 October 2007 /Published: 30 October 2007
Abstract: A comparative study of two biopolymer based fiber optic humidity sensors is presented in this paper. Sensing elements Agarose and Chitosan swells in the presence of water vapour and undergoes changes in refractive index and modulates the intensity of light propagating through a fiber with Agarose or Chitosan as cladding.
Keywords: Fiber optic sensor, Humidity sensor, Swelling polymer, Chitosan, Agarose
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