Non-dispersive infra-red (NDIR) measurement of carbon dioxide at 4.2μm in a compact and optically efficient sensor

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dc.contributor.author Hodgkinson, Jane -
dc.contributor.author Smith, R. -
dc.contributor.author Ho, Wah On -
dc.contributor.author Saffell, John R. -
dc.contributor.author Tatam, Ralph P. -
dc.date.accessioned 2014-01-24T05:01:52Z
dc.date.available 2014-01-24T05:01:52Z
dc.date.issued 2013-09-30T00:00:00Z -
dc.identifier.citation Jane Hodgkinson, Richard Smith, Wah On Ho, John R. Saffell, Ralph P. Tatam, Non-dispersive infra-red (NDIR) measurement of carbon dioxide at 4.2μm in a compact and optically efficient sensor, Sensors and Actuators B: Chemical, Volume 186, September 2013, Pages 580–588.
dc.identifier.issn 0925-4005 -
dc.identifier.uri http://dx.doi.org/10.1016/j.snb.2013.06.006 -
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/8119
dc.description.abstract Non-dispersive infra-red (NDIR) gas detection has enjoyed widespread uptake as a result of development of devices in the standard miniature format for gas sensors, consisting of a cylinder with external dimensions of 20mm diameter x 16.5mm height. We present a new design for such a sensor, making use of low-cost injection moulding technology. The design pays particular attention to the problem of maintaining a high optical throughput while providing an acceptable optical pathlength for gas detection. A detailed analysis of the design is presented, with the results of optical raytracing, showing a raytrace estimate for 4% of the total emitted radiation reaching each of two separated detector elements and a pathlength of 32mm. Finally, we show experimental results obtained with as-manufactured devices, with a short-term limit of detection for carbon dioxide (CO2) estimated at 1ppm or a noise equivalent absorption (NEA) of 3x10-5AU. en_UK
dc.language.iso en_UK -
dc.publisher Elsevier Science B.V., Amsterdam. en_UK
dc.rights NOTICE: this is the author’s version of a work that was accepted for publication in Sensors and Actuators B: Chemical. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Sensors and Actuators B: Chemical, VOL 186, (2013) DOI: 10.1016/j.snb.2013.06.006
dc.title Non-dispersive infra-red (NDIR) measurement of carbon dioxide at 4.2μm in a compact and optically efficient sensor en_UK
dc.type Article -


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