Examination of adulteration of edible oils by using fiber optic displacement sensor

Nordin, Siti Noraminah (2021) Examination of adulteration of edible oils by using fiber optic displacement sensor. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A fiber optic sensor has been developed to detect the adulteration of edible oil. In this project, the sensing mechanism uses SMF-SMF and MMF-MMF based on displacement sensors by using lateral offset method. The distance offset for SMF-SMF is 6.47 μm,11.57 μm, and 14.64 μm, while for MMF-MMF is 4.42 μm,7.49 μm,7.83 μm. The refractive index for pure coconut oil, paraffin oil, and palm oil are found to be 1.4481,1.4585, and 1.4634. The sensitivity of each sensor determined by referring to the highest offset distance of each fiber. For SMF-SMF, the highest offset distance is14.64 μm and the sensitivity have been tested in two mixed solutions which is coconut oil with palm oil with sensitivity -0.286dBm/mol and for solution coconut oil with paraffin oil with sensitivity -0.045 dBm/mol. For MMF-MMF, the highest offset distance is at 7.83 μm highest and the sensitivity have been tested in two mix solution which is coconut oil with palm oil with sensitivity -0.406 dBm/mol and for solution coconut oil with paraffin oil with sensitivity -0.437 dBm/mol. It is proven that the larger the offset distance, the higher the sensitivity of the fiber sensor.

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