LPG based fiber optic sensor for carbon dioxide

C. Gouveia; K. Balogh; J. M. Baptista; B. Kovacs; P. A. S. Jorge

doi:10.1117/12.975279

7 November 2012 LPG based fiber optic sensor for carbon dioxide

C. Gouveia, K. Balogh, J. M. Baptista, B. Kovacs, P. A. S. Jorge

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84216L (2012) https://doi.org/10.1117/12.975279
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

In this work a novel optical-fiber sensor for carbon dioxide measurement is presented. A polymeric sensitive layer based on the acid-base equilibrium of phenol and of its derivative 4-nitro-phenol is used for carbon dioxide determination. The sensitive material presents changes in color and in its refractive index. Colorimetric and refractometric measurements were performed. The results show the sensor is more sensitive for lower concentrations and a saturation effect occurs for higher levels. For the colorimetric response, a resolution of ±0.15% was estimated and a response time of 30s was measured. For the refractometric measurements, a resolution of ±0.50% could be estimated and a response time of 12s was measured. Reversibility and reproducibility were also demonstrated.

Citation Download Citation

C. Gouveia, K. Balogh, J. M. Baptista, B. Kovacs, and P. A. S. Jorge "LPG based fiber optic sensor for carbon dioxide", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216L (7 November 2012); https://doi.org/10.1117/12.975279

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