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Sensors 2008, 8(4), 2453-2479; doi:10.3390/s8042453

Absorbance Based Light Emitting Diode Optical Sensors and Sensing Devices

Adaptive Sensors Group, National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
Author to whom correspondence should be addressed.
Received: 11 October 2007 / Accepted: 31 March 2008 / Published: 7 April 2008
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The ever increasing demand for in situ monitoring of health, environment and security has created a need for reliable, miniaturised sensing devices. To achieve this, appropriate analytical devices are required that possess operating characteristics of reliability, low power consumption, low cost, autonomous operation capability and compatibility with wireless communications systems. The use of light emitting diodes (LEDs) as light sources is one strategy, which has been successfully applied in chemical sensing. This paper summarises the development and advancement of LED based chemical sensors and sensing devices in terms of their configuration and application, with the focus on transmittance and reflectance absorptiometric measurements.
Keywords: Light emitting diodes; chemical sensors; microfluidics; optical detectors Light emitting diodes; chemical sensors; microfluidics; optical detectors
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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O’Toole, M.; Diamond, D. Absorbance Based Light Emitting Diode Optical Sensors and Sensing Devices. Sensors 2008, 8, 2453-2479.

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