U-Shaped POF Sensor for Ethanol/Methanol Determination

Year 2021, Volume: 37 Issue: 1, 149 - 156, 28.04.2021

Timuçin Emre Tabaru , Şekip Esat Hayber

Abstract

In this study, U-shaped fiber optic sensor tips sensitive to refractive index (RI) change were produced, and its performance analyses were carried out. Three sensor tips were used to measure ethanol/methanol-water mixtures in concentrations from 0% to 16.66%. The ethanol sensor tip was able to detect the RI change of 4×10-4 RIU. Its maximum sensitivity is 7.71 mV/RIU, and its linearity is 0.9985. The methanol sensor tip was able to detect the RI change of 1×10-4 RIU. Its maximum sensitivity is 28.49 mV/RIU, and its linearity is 0.9969. Each sensor tips determine the change of 1.41% concentration in the mixtures. Moreover, the results show that it can provide high precision in the measurement of ethanol/methanol-water mixtures and achieve satisfying stability and repeatability.

Keywords

U-Shaped sensor, Refractive index, Plastic optical fiber, Ethanol/Methanol determination

Thanks

The authors would like to thank Erciyes University Clinical Engineering Research and Application Center and FOSENS Electro Optic Technologies for their supports in the research activities among the staff.

U-Shaped Plastic Optic Fiber Sensor for Ethanol/Methanol Determination

Abstract

Bu çalışmada kırılma indisi (RI) değişimine duyarlı U-Şeklindeki fiber optik sensör uçları üretilmiş ve performans analizleri yapılmıştır. %0 ile %16,66 arasındaki konsantrasyonlarda etanol/metanol-su karışımlarını ölçmek için üç sensör ucu kullanılmıştır. Etanol sensör ucu, 4×10-4 RIU’luk kırılma indisindeki değişimi tespit etmiştir. Etanol sensör ucunun maksimum hassasiyeti 7,71 mV/RIU ve doğrusallığı 0,9985’tir. Metanol sensör ucu ise 1×10-4 RIU’luk kırılma indisindeki değişimi tespit etmiştir. Bu ucun maksimum hassasiyeti 28,49 mV/RIU ve doğrusallığı 0,9969’dur. Her bir sensör ucu, karışımlardaki %1,41 konsantrasyondaki değişikliği belirlemiştir. Ayrıca sonuçlar, sensör uçlarının sadece etanol/metanol-su karışımlarının ölçümünde yüksek kesinlik sağlamakla kalmayıp aynı zamanda tatmin edici kararlılık ve tekrarlanabilirlik sağladığını da göstermektedir.

Keywords

U-Şeklinde sensör, Kırılma indisi, Plastik fiber optik, Etanol/Metanol tayini

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