Next Article in Journal
Micro Semiconductor CO Sensors Based on Indium-Doped Tin Dioxide Nanocrystalline Powders
Previous Article in Journal
CNT Sensors for Detecting Gases with Low Adsorption Energy by Ionization
Article Menu

Export Article

Open AccessArticle
Sensors 2006, 6(5), 514-525; doi:10.3390/s6050514

Light Dependent Resistance as a Sensor in Spectroscopy Setups Using Pulsed Light and Compared with Electret Microphones

Instituto de Pesquisa e Desenvolvimento (IP&D), Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, CEP 12244-000, São José dos Campos, SP, Brasil
entro Brasileiro de Pesquisas Físicas, R. Dr. Xavier Sigaud 150, CEP 22290-180, Rio de Janeiro, RJ, Brasil
Author to whom correspondence should be addressed.
Received: 1 February 2006 / Revised: 27 April 2006 / Accepted: 9 May 2006 / Published: 9 May 2006
View Full-Text   |   Download PDF [263 KB, uploaded 20 June 2014]   |  


Light-dependent resistances (LDR) are cheap light sensors. A less known lightdetector is the electret microphone, whose electret membrane functions as a perfectabsorber, but only detects pulsed light. The aim of this study was to analyze the use of aLDR and an electret microphone as a light sensor in an optical spectroscopy system usingpulsed light. A photoacoustic spectroscopy setup was used, substituting the photoacousticchamber by the light sensor proposed. The absorption spectra of two different liquids wereanalyzed. The results obtained allow the recommendation of the LDR as the first choice inthe construction of cheap homemade pulsed light spectroscopy systems.
Keywords: LDR; electret microphone; photoacoustic; pulsed light. LDR; electret microphone; photoacoustic; pulsed light.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Da Silva, D.F.; Acosta-Avalos, D. Light Dependent Resistance as a Sensor in Spectroscopy Setups Using Pulsed Light and Compared with Electret Microphones. Sensors 2006, 6, 514-525.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top