Rodríguez Rodríguez, Adolfo JosuéMay Arrioja, Daniel A.Domínguez Cruz, RenéRuiz Zamarreño, CarlosMatías Maestro, IgnacioArregui San Martín, Francisco Javier2024-12-172024-12-172014-12-15Rodriguez Rodriguez, A. J., May-Arrioja, D. A., Dominguez Cruz, R. F., Zamarreno, C. R., Matias Maestro, R. I., Arregui San Martin, F. (2014) Fiber optic ammonia sensor using Bromocresol Green pH indicator. In IEEE Sensors Council (Ed.), IEEE Sensors 2014 Proceedings (pp. 1146-1149). IEEE. https://doi.org/10.1109/ICSENS.2014.6985210978-1-4799-0161-610.1109/ICSENS.2014.6985210https://academica-e.unavarra.es/handle/2454/52763We report a fiber optic sensor for low levels of ammonia gas detection based on the use a Bromocresol Green (BCG) pH indicator attached to the optical fiber employing hydrophobic and gas permeable polyurethane film named Tecoflex® as attraping matrix. Highly reproducible and reversible fiber optical sensors have been achieved employing simple and short fabrication processes. The advantage for employ a BCG pH indicator is to take advantage of the basicity of ammonia exhibiting a wide spectral response (500 nm-750 nm) and shows recovery times of less than 15 s. The Tecoflex® film provides additional advantages to be measured to the sensitive area of the sensor, such as operation even in extremely dry environments, efficient transport and prevent leakage or detachment of the BCG pH indicator. The combination of the BCG pH indicator and Tecoflex® film provides a reliable and robust fiber optic ammonia gas sensor.application/pdfeng© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.Optical fiber sensorAmmonia sensorpH indicatorinfo:eu-repo/semantics/conferenceObject2024-12-17info:eu-repo/semantics/closedAccess