Underwater depth and temperature sensing based on fiber optic technology for marine and fresh water applications

Dinesh Babu Duraibabu, Gabriel Leen, Daniel Toal, Thomas Newe, Elfed Lewis, Gerard Dooly

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

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.

Original languageEnglish
Article number1228
JournalSensors
Volume17
Issue number6
DOIs
Publication statusPublished - Jun 2017
Externally publishedYes

Keywords

  • Fabry-perot
  • Fibre bragg gratings
  • Ocean sensing
  • Optical fibre sensors
  • Pressure sensor
  • ROV
  • Sub-sea temperature and pressure
  • Temperature sensor

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