Characterization of a novel dissolved CO2 sensor for utilization in environmental monitoring and aquaculture industry

• Type: Article in International Conference Proceedings Book
• Date: 2013

Authors

Balogh, K (Author) Other; Joao M Jesus (Author) Other; Gouveia, C (Author) Other; Jorge O Domingues (Author) Other; Markovics, A (Author) Other; Baptista, JM (Author) Other; Kovacs, B (Author) Other; Carlos M Pereira (Author) FCUP; Maria Teresa Borges (Author) FCUP; Jorge, PAS (Author) Other

Conference proceedings International

Title: 8TH IBEROAMERICAN OPTICS MEETING AND 11TH LATIN AMERICAN MEETING ON OPTICS, LASERS, AND APPLICATIONS

8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications

Porto, PORTUGAL, JUL 22-26, 2013

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 3 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-006-K3X

DOI: 10.1117/12.2027518

Abstract (EN): A novel optical fiber sensor is presented for measuring dissolved CO2 for water quality monitoring applications, where the optical signal is based either on refractive index changes or on color change. The sensing chemistry is based on the acid-basic equilibrium of 4-nitrophenol, that is converted into the anionic form by addition quaternary ammonium hydroxide. The CO2 sensitive layer was characterized and tested by using simple absorbance/reflectance measurement setups where the sensor was connected to a fiber optic CCD spectrometer. A prototype simulating a real shallow raceway aquaculture system was developed and its hydraulic behavior characterized. A commercially available partial-pressure-NDIR sensor was used as a reference for dissolved CO2 tests with the new optical fiber sensor under development. Preliminary tests allowed verifying the suitability of the new optical sensor for accurately tracking the dissolved carbon dioxide concentration in a suitable operation range. Direct comparison of the new sensor and the reference sensor system allowed to demonstrate the suitability of the new technology but also to identify some fragilities there are presently being addressed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7