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Novel study of design for miniature correlation spectroscopy handheld gas sensor for methane (CH4) using 2.3 µm wavelength band

Novel study of design for miniature correlation spectroscopy handheld gas sensor for methane (CH4) using 2.3 µm wavelength band
Novel study of design for miniature correlation spectroscopy handheld gas sensor for methane (CH4) using 2.3 µm wavelength band
A highy selective methane gas sensor, using the correlation spectroscopy technique, has been constructed. This sensor is handheld and has a compact folded cell arrangement; it operates with 2.3 µm switched LED sources. The selected methane absorption band at 2.3 µm is relatively strong, even over a short path length (10 cm), yet this wavelength still allows the use of commercial glass lenses and optical windows, a simple 45° silicon wafer slice as a beam splitter and low noise InGaAs detectors. A noise-limited detection sensitivity of 0.21% by volume with a measurement time constant of 0.1 s was achieved.
Ibrahim, Raja Kamarulzaman Raja
83db12ef-f828-4c5c-8990-3299121124c0
Ibrahim, Raja Kamarulzaman Raja
83db12ef-f828-4c5c-8990-3299121124c0
Dakin, John
04891b9b-5fb5-4245-879e-9e7361adf904

Ibrahim, Raja Kamarulzaman Raja (2005) Novel study of design for miniature correlation spectroscopy handheld gas sensor for methane (CH4) using 2.3 µm wavelength band. University of Southampton, Optoelectronics Research Centre, Masters Thesis, 189pp.

Record type: Thesis (Masters)

Abstract

A highy selective methane gas sensor, using the correlation spectroscopy technique, has been constructed. This sensor is handheld and has a compact folded cell arrangement; it operates with 2.3 µm switched LED sources. The selected methane absorption band at 2.3 µm is relatively strong, even over a short path length (10 cm), yet this wavelength still allows the use of commercial glass lenses and optical windows, a simple 45° silicon wafer slice as a beam splitter and low noise InGaAs detectors. A noise-limited detection sensitivity of 0.21% by volume with a measurement time constant of 0.1 s was achieved.

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Published date: August 2005
Organisations: University of Southampton, Optoelectronics Research Centre

Identifiers

Local EPrints ID: 361297
URI: https://eprints.soton.ac.uk/id/eprint/361297
PURE UUID: 3f7de61a-5b16-4441-8cd8-b5bd444304f2

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Date deposited: 24 Jan 2014 16:49
Last modified: 18 Jul 2017 03:04

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Contributors

Author: Raja Kamarulzaman Raja Ibrahim
Thesis advisor: John Dakin

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