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Proceedings Paper

Integrated optic gaseous NH3 sensor for agricultural applications
Author(s): Nile F. Hartman; James L. Walsh; Daniel P. Campbell; Umesh Akki
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Paper Abstract

An integrated optic sensor for monitoring NH3 volatization as related to agricultural fertilizer applications is described. The sensor is capable of monitoring NH3 levels over a range from less than 100 parts per billion by volume to levels approaching 1000 parts per million by volume. The sensor is based on a planar waveguide operating in an interferometric mode. The device functions by monitoring a refractive index change resulting from a reversible chemical reaction occurring on the waveguide surface.

Paper Details

Date Published: 6 January 1995
PDF: 10 pages
Proc. SPIE 2345, Optics in Agriculture, Forestry, and Biological Processing, (6 January 1995); doi: 10.1117/12.198886
Show Author Affiliations
Nile F. Hartman, Georgia Institute of Technology (United States)
James L. Walsh, Georgia Institute of Technology (United States)
Daniel P. Campbell, Georgia Institute of Technology (United States)
Umesh Akki, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 2345:
Optics in Agriculture, Forestry, and Biological Processing
George E. Meyer; James A. DeShazer, Editor(s)

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