Performance of a 3D printed photoacoustic sensor for gas detection in mid-infrared

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

4 Citations (Scopus)

Abstract

This paper describes the performance of two miniaturized stereolithographic 3D-printed photo-acoustic gas sensors designed for the mid-IR. The first sensor uses a commercial electret microphone, and the second contains a MEMS microphone. A resonant photo-acoustic cell design is used for both sensors, employing the first longitudinal resonance to amplify the signal. The sensor design performance is investigated using Finite Element Modelling software - COMSOL multiphysics before fabrication to optimise dimensions for maximum signal. A comparison is then given of the sensors performance with the two different microphone types, using an 8.65 μm continuous wave Quantum Cascade Laser and methane, giving a limit of detection of 90 ppm for an integration time of 266 seconds for the electret microphone and 182 ppm for an integration time of 261 seconds for the MEMS microphone.
Original languageEnglish
Title of host publicationIEEE SENSORS 2017 Conference Proceedings
Place of PublicationPiscataway, N.J.
PublisherIEEE
Pages1482-1484
Number of pages3
Edition2017
ISBN (Electronic)9781538640562
ISBN (Print)9781538640562
Publication statusPublished - 3 Oct 2017
EventIEEE SENSORS 2017 - Scottish Exhibition and Conference Centre, Glasgow, United Kingdom
Duration: 29 Oct 20171 Nov 2017
http://www.ieee-sensors2017.org

Conference

ConferenceIEEE SENSORS 2017
Country/TerritoryUnited Kingdom
CityGlasgow
Period29/10/171/11/17
Internet address

Keywords

  • miniaturized
  • 3D-printed
  • photoacoustic trace gas sensor
  • photoacoustic
  • quantum cascade laser
  • mid-infrared spectroscopy

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