Ammonia detection in water with balloon-like plastic optical fiber sensor

Nurfatihah Che Abd Rashid, Nurfatihah Che Abd Rashid and Noran Azizan Cholan, Noran Azizan Cholan and Kim Gaik Tay, Kim Gaik Tay and Azra Munirah Mat Daud, Azra Munirah Mat Daud and Nurul Atika Nabila Jaharudin, Nurul Atika Nabila Jaharudin and Nazrah Ilyana Sulaiman, Nazrah Ilyana Sulaiman and Nor Hafizah Ngajikin, Nor Hafizah Ngajikin (2023) Ammonia detection in water with balloon-like plastic optical fiber sensor. Engineering Research Express, 5. pp. 1-10.

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Abstract

This work presents the demonstration of a plastic optical fiber(POF)-based ammonia sensor. The sensor head is formed by bending an unclad fiber optic sensor into a balloon-like structure. The bending radius of the balloon-like bent fiber optic sensor is varied from 1.0 to 2.5 cm. The performance of each sensor is tested using ammonia solution with concentration ranging from 0 to 15 mg l−1 . Results show that the optimized performances of the proposed sensor occur when the bending radius is fixed at 1.5 cm. At this bending radius, the sensor illustrates the sensitivity of − 0.0024 (mg/l) −1with linearity of 0.97 and resolution of − 4.17 mg l−1 . For comparison, the bent sensor is compared to the straight sensor and performances of the former is found to be more superior. In addition, the balloon-like bent sensor is further tested with real water samples. The sensor sensitivity is found to be − 0.0022 (mg/l) −1with linearity of 0.95 and resolution of − 4.54 mg l−1 . The result shows that the sensor has comparable performance in the ammonia detection for both pure ammonia and real water samples. In essence, this balloon-like bent sensor functions without additional coating on the sensor head, making it favorable in terms of the simplicity of the design.

Item Type:	Article
Uncontrolled Keywords:	ammonia detection, balloon-like structure, macro-bending, optical sensor
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Electrical and Electronic Engineering > Department of Electrical Engineering
Depositing User:	Mr. Mohamad Zulkhibri Rahmad
Date Deposited:	03 Jan 2024 01:36
Last Modified:	03 Jan 2024 01:36
URI:	http://eprints.uthm.edu.my/id/eprint/10550

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