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Proceedings Paper

Compact low-power gas detector for chemical alarms
Author(s): Douglas R. Adkins; Patrick R. Lewis
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Paper Abstract

Through an internally funded research program, Defiant Technologies has developed a compact chemical detector that can be tailored for a range of target analytes. The system uses a preconcentrator (PC) to collect and screen samples from the air, and a surface acoustic wave (SAW) microbalance to detect analytes when they are released from the PC. This PC-SAW system serves as a trigger for a secondary analysis channel that uses a micro-gas chromatographic (micro-GC) column to perform a more detailed analysis of the air. This combined approach provides high-confidence results while conserving power and minimizing response time. By properly selecting coatings on the PC, micro-GC and SAW, the unit can be designed for optimum performance in detecting specific target gases while ignoring interferents. This paper presents test results from our research and discusses some of the applications for this type of system.

Paper Details

Date Published: 8 May 2009
PDF: 10 pages
Proc. SPIE 7304, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing X, 73040S (8 May 2009); doi: 10.1117/12.820294
Show Author Affiliations
Douglas R. Adkins, Defiant Technologies, Inc. (United States)
Patrick R. Lewis, Defiant Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 7304:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing X
Augustus W. Fountain; Patrick J. Gardner, Editor(s)

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