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Proceedings Paper

Hydrazine/nitrogen dioxide fiber optic sensor
Author(s): Alfred A. Andrawis; Josephine Santiago; Rebecca C. Young; J. Clayton Baum
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Paper Abstract

This paper outlines the development of a dual hydrazine/nitrogen dioxide (HZ/NO2) prototype fiber optic sensor utilizing an acid-base indicator that undergoes color changes depending on which gas is present. Bromothymol blue bromocresol green mixture (1/1) in hydrogel (1/1), produces a blue-green indicator for HZ and/or NO2. The sensor was tested several times over a period of eight weeks and the response was cconsistent and proved the feasibility of dual HZ/NO2 leak detection. Prototype sensor construction, the hardware, and the software of the electronic interrogator circuitry are briefly explained. The paper presents a summary of sensor response when exposed to 52 ppm and 18 ppm hydrazine and 400 ppm and 200 ppm nitrogen dioxide.

Paper Details

Date Published: 9 June 2004
PDF: 4 pages
Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); doi: 10.1117/12.566612
Show Author Affiliations
Alfred A. Andrawis, South Dakota State Univ. (United States)
Josephine Santiago, South Dakota State Univ. (United States)
Rebecca C. Young, NASA Kennedy Space Ctr. (United States)
J. Clayton Baum, Florida Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5502:
Second European Workshop on Optical Fibre Sensors

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