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Sensors 2014, 14(9), 17817-17828; doi:10.3390/s140917817

Gasohol Quality Control for Real Time Applications by Means of a Multimode Interference Fiber Sensor

1
Fiber and Integrated Optics Laboratory, Electronics Engineering Department, UAM Reynosa Rodhe, Universidad Autónoma de Tamaulipas, Carr. Reynosa-San Fernando S/N, Reynosa, Tamaulipas 88779, Mexico
2
Departamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Edif. Los Tejos, Campus Arrosadia, Pamplona 31006, Spain
*
Author to whom correspondence should be addressed.
Received: 21 July 2014 / Revised: 4 September 2014 / Accepted: 9 September 2014 / Published: 25 September 2014
(This article belongs to the Section Physical Sensors)
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Abstract

In this work we demonstrate efficient quality control of a variety of gasoline and ethanol (gasohol) blends using a multimode interference (MMI) fiber sensor. The operational principle relies on the fact that the addition of ethanol to the gasohol blend reduces the refractive index (RI) of the gasoline. Since MMI sensors are capable of detecting small RI changes, the ethanol content of the gasohol blend is easily determined by tracking the MMI peak wavelength response. Gasohol blends with ethanol contents ranging from 0% to 50% has been clearly identified using this device, which provides a linear response with a maximum sensitivity of 0.270 nm/% EtOH. The sensor can also distinguish when water incorporated in the blend has exceeded the maximum volume tolerated by the gasohol blend, which is responsible for phase separation of the ethanol and gasoline and could cause serious engine failures. Since the MMI sensor is straightforward to fabricate and does not require any special coating it is a cost effective solution for real time and in-situ monitoring of the quality of gasohol blends. View Full-Text
Keywords: optical fiber sensor; multimode interference; MMI; gasohol; gasoline; ethanol optical fiber sensor; multimode interference; MMI; gasohol; gasoline; ethanol
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Rodríguez, A.J.R.; Baldovino-Pantaleón, O.; Cruz, R.F.D.; Zamarreño, C.R.; Matías, I.R.; May-Arrioja, D.A. Gasohol Quality Control for Real Time Applications by Means of a Multimode Interference Fiber Sensor. Sensors 2014, 14, 17817-17828.

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