Next Article in Journal
Adaptive Control of a Vibratory Angle Measuring Gyroscope
Previous Article in Journal
A High-Sensitivity Hydraulic Load Cell for Small Kitchen Appliances
Article Menu

Export Article

Open AccessArticle
Sensors 2010, 10(9), 8466-8477; doi:10.3390/s100908466

Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy

1
Clausthal University of Technology, Institute for Energy Research and Physical Technology, Energy-Campus, Am Stollen 19, 38640 Goslar, Germany
2
Fraunhofer Heinrich Hertz Institute, Energy-Campus, Am Stollen 19, 38640 Goslar, Germany
*
Author to whom correspondence should be addressed.
Received: 10 August 2010 / Revised: 30 August 2010 / Accepted: 8 September 2010 / Published: 9 September 2010
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [474 KB, uploaded 21 June 2014]   |  

Abstract

Molecular oxygen is detected at low concentrations using photoacoustic spectroscopy despite its unfavorable photoacoustic properties. The system consists of a seed laser diode, a tapered amplifier and a quartz tuning fork based spectrophone, thus employing quartz enhanced photoacoustic spectroscopy (QEPAS). With this system a detection limit of 13 ppm is reached with a compact and long term stable setup. Further improvement of the detection limit is possible by adding suitable gases to the sample gas that promote the radiationless de-excitation of the oxygen molecules. View Full-Text
Keywords: Gas sensing; photoacoustic spectroscopy; QEPAS; oxygen sensing Gas sensing; photoacoustic spectroscopy; QEPAS; oxygen sensing
Figures

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

Pohlkötter, A.; Köhring, M.; Willer, U.; Schade, W. Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy. Sensors 2010, 10, 8466-8477.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

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