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Sensors 2018, 18(5), 1435; https://doi.org/10.3390/s18051435

Liquefied Petroleum Gas Monitoring System Based on Polystyrene Coated Long Period Grating

1
Department of Engineering, University of Naples “Parthenope”, 80143 Napoli, Italy
2
Institute for Polymers, Composites and Biomaterials (IPCB)-CNR, 80055 Portici, Italy
3
Optoelectronics group, Department of Engineering, University of Sannio, 82100 Benevento, Italy
4
Centro Regionale Information Communication Technology-CeRICT scrl, 82100 Benevento, Italy
*
Authors to whom correspondence should be addressed.
Received: 11 April 2018 / Revised: 3 May 2018 / Accepted: 3 May 2018 / Published: 5 May 2018
(This article belongs to the Section Physical Sensors)
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Abstract

In this work, we report the in-field demonstration of a liquefied petroleum gas monitoring system based on optical fiber technology. Long-period grating coated with a thin layer of atactic polystyrene (aPS) was employed as a gas sensor, and an array comprising two different fiber Bragg gratings was set for the monitoring of environmental conditions such as temperature and humidity. A custom package was developed for the sensors, ensuring their suitable installation and operation in harsh conditions. The developed system was installed in a real railway location scenario (i.e., a southern Italian operative railway tunnel), and tests were performed to validate the system performances in operational mode. Daytime normal working operations of the railway line and controlled gas expositions, at very low concentrations, were the searched realistic conditions for an out-of-lab validation of the developed system. Encouraging results were obtained with a precise indication of the gas concentration and external conditioning of the sensor. View Full-Text
Keywords: chemical sensors; gas detectors; long period gratings; optical fiber sensors; polymers chemical sensors; gas detectors; long period gratings; optical fiber sensors; polymers
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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 (CC BY 4.0).
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Esposito, F.; Zotti, A.; Palumbo, G.; Zuppolini, S.; Consales, M.; Cutolo, A.; Borriello, A.; Campopiano, S.; Zarrelli, M.; Iadicicco, A. Liquefied Petroleum Gas Monitoring System Based on Polystyrene Coated Long Period Grating. Sensors 2018, 18, 1435.

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