Measurement of CO2 using refractometric fiber optic sensors

• Type: Article in International Conference Proceedings Book
• Date: 2010

Authors

Gouveia, C (Author) Other; Markovics, A (Author) Other; Baptista, JM (Author) Other; Kovacs, B (Author) Other; Jorge, PAS (Author) FCUP

Conference proceedings International

Title: Advances in Sensors, Signals and Materials - 3rd WSEAS International Conference on Sensors and Signals, SENSIG'10, 3rd WSEAS International Conference on Materials Science, MATERIALS'10

Pages: 169-173

3rd WSEAS International Conference on Sensors and Signals, SENSIG'10, 3rd WSEAS International Conference on Materials Science, MATERIALS'10

Faro, 3 November 2010 through 5 November 2010

Indexing

Scopus - 7 Citations

Other information

Authenticus ID: P-007-Z24

Abstract (EN): An indicator free optical fiber sensor for determination of carbon dioxide is presented. The sensing layer is based on the acid-basic equilibrium of phenol and of its derivative p-nitro-phenol that, in the presence of CO2, are prone to protonation introducing refractive index changes. The new sensitive layer is characterized and tested in different refractometric fiber optic sensor configurations. Using a fiber based interferometric setup, a CO 2 dependent refractive index change of ~0.05 RIU is observed, in the 10%-90% CO2 concentration range, demonstrating the membrane viability. Preliminary results are presented for an all-fiber LPG-based carbon dioxide sensor.

Language: English

Type (Professor's evaluation): Scientific