NTRS - NASA Technical Reports Server

Back to Results
Solid State oxygen Sensor DevelopmentTo anticipate future long-duration mission needs for life support sensors, we explored the feasibility of using thin-film metal-oxide semiconductors. The objective of this task was to develop gas sensors for life support applications which would be suitable for long-duration missions. Metal oxides, such as ZnO, SnO2, and TiO2 have been shown to react with oxygen molecules. Oxygen lowers the metal oxide's electrical resistance. Critical to the performance is the application of the oxide in a thin film on an inert substrate: the thinner the film, the more readily the oxygen penetration and hence the more rapid and sensitive the sensor. Metal oxides are not limited to oxygen detection, rather, oxides offer detection and quantification applications to the complete range of gases of interest, not only for life support systems, but for propellants as well.
Document ID
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Cheung, Jeffery T.
(Rockwell International Corp. Houston, TX United States)
Johnson, Scott R.
(Rockwell International Corp. Houston, TX United States)
Date Acquired
August 17, 2013
Publication Date
May 1, 1994
Publication Information
Publication: Dual-Use Space Technology Transfer Conference and Exhibition
Volume: 1
Subject Category
Man/System Technology And Life Support
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available