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Sensors 2017, 17(6), 1228; doi:10.3390/s17061228

Underwater Depth and Temperature Sensing Based on Fiber Optic Technology for Marine and Fresh Water Applications

1
Optical Fibre Sensors Research Centre (OFSRC), University of Limerick, Limerick V94 T9PX, Ireland
2
Mobile and Marine Robotics Research Centre (MMRRC); University of Limeirck, Limerick V94 T9PX, Ireland
*
Authors to whom correspondence should be addressed.
Academic Editors: Wei Song, Antonio Liotta and Ge Chen
Received: 13 April 2017 / Revised: 24 May 2017 / Accepted: 24 May 2017 / Published: 27 May 2017
(This article belongs to the Special Issue Marine Sensing)
View Full-Text   |   Download PDF [31763 KB, uploaded 27 May 2017]   |  

Abstract

Oceanic conditions play an important role in determining the effects of climate change and these effects can be monitored through the changes in the physical properties of sea water. In fact, Oceanographers use various probes for measuring the properties within the water column. CTDs (Conductivity, Temperature and Depth) provide profiles of physical and chemical parameters of the water column. A CTD device consists of Conductivity (C), Temperature (T) and Depth (D) probes to monitor the water column changes with respect to relative depth. An optical fibre-based point sensor used as a combined pressure (depth) and temperature sensor and the sensor system are described. Measurements accruing from underwater trials of a miniature sensor for pressure (depth) and temperature in the ocean and in fresh water are reported. The sensor exhibits excellent stability and its performance is shown to be comparable with the Sea-Bird Scientific commercial sensor: SBE9Plus. View Full-Text
Keywords: temperature sensor; pressure sensor; optical fibre sensors; fibre bragg gratings; fabry-perot; ROV; ocean sensing; sub-sea temperature and pressure temperature sensor; pressure sensor; optical fibre sensors; fibre bragg gratings; fabry-perot; ROV; ocean sensing; sub-sea temperature and pressure
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Duraibabu, D.B.; Leen, G.; Toal, D.; Newe, T.; Lewis, E.; Dooly, G. Underwater Depth and Temperature Sensing Based on Fiber Optic Technology for Marine and Fresh Water Applications. Sensors 2017, 17, 1228.

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