dc.contributor.author |
Wilson, A.C. |
en |
dc.contributor.author |
Barnes, T.H. |
en |
dc.contributor.author |
Seakins, P.J. |
en |
dc.contributor.author |
Rolfe, T.G. |
en |
dc.contributor.author |
Meyer, E.J. |
en |
dc.date.accessioned |
2009-09-03T04:39:34Z |
en |
dc.date.available |
2009-09-03T04:39:34Z |
en |
dc.date.issued |
1995 |
en |
dc.identifier.citation |
Review of Scientific Instruments 66 (12), 5618-5624. 1995 |
en |
dc.identifier.issn |
0034-6748 |
en |
dc.identifier.other |
eid=2-s2.0-0029136126 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/5182 |
en |
dc.description |
An open access copy of this article is available and complies with the copyright holder/publisher conditions. |
en |
dc.description.abstract |
We describe a simple near-infrared hygrometer based on a broadband light-emitting diode (LED) centered at 1320 nm. Light from the LED is collimated and passes through a rotating optical-filter assembly and a sample cell. The water vapor concentration is measured using a synchronous detection scheme. This compact and robust instrument has a response time of 0.15 s and can reliably detect short-term absolute humidity changes as small as 0.6 mg/L (which equate to 0.02% absorption); the long-term stability of the absolute humidity measurement over a period of 4 days is approximately 1 mg/L. These performance characteristics are particularly well suited to measurements associated with human respiration, and we present results in this humidity regime. |
en |
dc.publisher |
American Institute of Physics (AIP) |
en |
dc.relation.ispartofseries |
Review of Scientific Instruments |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0034-6748/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.source.uri |
http://dx.doi.org/10.1063/1.1146028 |
en |
dc.title |
A low-cost, high-speed, near-infrared hygrometer |
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dc.type |
Journal Article |
en |
dc.subject.marsden |
Fields of Research::240000 Physical Sciences |
en |
dc.identifier.doi |
10.1063/1.1146028 |
en |
pubs.issue |
12 |
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pubs.begin-page |
5618 |
en |
pubs.volume |
66 |
en |
dc.description.version |
VoR - Version of Record |
en |
dc.rights.holder |
Copyright: 1995 American Institute of Physics. |
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pubs.end-page |
5624 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
en |