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Edible oils adulteration analysis by fiber optic multimode displacement sensor



  1. Centre for Telecommunication Research & Innovation (CeTRI), Fakulti Kejuruteraan Elektronik dan Kejuruteraan Komputer (FKEKK), Universiti Teknikal Malaysia Melaka (UTeM), Hang Tuah Jaya, 76100, Duria
  2. Dept. of Electronic Engineering Faculty of Electrical & Electronic Engineering (FKEE) Universiti Tun Hussein Onn Malaysia (UTHM) Batu Pahat, Johor, Malaysia


A fiber optic sensor has been developed to detect the adulteration in edible oil, particularly coconut oil. In this paper, the sensing mechanism uses MMF-MMF based on displacement sensors by employing the lateral offset method. The distance offset set were 4.42 μm, 7.49 μm, and 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 respectively. The sensitivity of each sensor was determined by referring to the highest offset distance of each fiber. Upon completion, the highest sensitivity was observed for 7.83 µm lateral offset distance which is 0.406 dBm/mol for palm oil detection and 0.437 dBm/mol for paraffin oil detection. The experimental results proved that the larger the offset distance, the higher the sensitivity of the fiber sensor.


Fiber sensor, Lateral, Edible oil, MMF.


HAZURA HAROON, SITI NORAMINAH NORDIN, THANIGAI ANBALAGAN, MAISARA OTHMAN, Edible oils adulteration analysis by fiber optic multimode displacement sensor, Optoelectronics and Advanced Materials - Rapid Communications, 16, 1-2, January-February 2022, pp.36-40 (2022).

Submitted at: July 27, 2021

Accepted at: Feb. 10, 2022