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LED-LED portable oxygen gas sensor

Perez de Vargas-Sansalvador, I.M. and Fay, Cormac and Fernandez-Ramos, M.D. and Diamond, Dermot and Benito-Lopez, Fernando and Capitan-Vallvey , L.F. (2012) LED-LED portable oxygen gas sensor. In: Europtrode 2012, 1-4 Apr 2012, Barcelona.

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Abstract

A portable instrument for oxygen determination, based on the quenching of phosphorescent octaethylporphyrin by gaseous O2, has been developed using the fluorimetric paired emitter–detector diode technique (FPEDD). The instrument configuration used consists of two light emitting diodes (LEDs) facing each other including an interchangeable support containing a phosphorescent membrane in between, in which one of the LEDs is used as the light source (emitter LED) and the other working in reverse bias mode as the light detector. In this report, we study the feasibility of using a LED as a luminescent detector and realising a sensing instrument whose small size possibles to embed it into a portable measurement system. A complete study of instrument was carried out in order to optimise the specifications of the portable instrument such as: range, sensitivity, short term and long term stability, dynamical behaviour, temperature influence, humidity influence and temporal drift. Keywords: Oxygen sensor, Gas sensor, Optical sensor, Paired emitter detector-diode sensor; Portable instrumentation.

Item Type:Conference or Workshop Item (Poster)
Event Type:Conference
Refereed:Yes
Subjects:Physical Sciences > Analytical chemistry
Physical Sciences > Chemical detectors
Physical Sciences > Environmental chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Published in:Europtrode 2012 Conference Abstracts. .
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:16904
Deposited On:23 Apr 2012 15:48 by Dermot Diamond. Last Modified 18 Dec 2012 09:59

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