Continued Development of Compact Multi-gas Monitor for Life Support Systems Control in Space



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46th International Conference on Environmental Systems


Miniature optical gas sensors based on luminescent materials have shown great potential as alternatives to NIR-based gas sensor systems for the Portable Life Support System (PLSS). The unique capability of luminescent sensors for carbon dioxide and oxygen monitoring under wet conditions has been reported, as has the fast recovery of humidity sensors after long periods of being wet. Lower volume and power requirements are also potential advantages over both traditional and advanced non-dispersive infrared (NDIR) gas sensors, which have so far shown longer life than luminescent sensors. In this paper we present the most recent results in the development and analytical validation of a compact multi-gas sensor unit based on luminescent sensors for the PLSS. Results of extensive testing are presented, including studies conducted in Intelligent Optical Systems laboratories, and a United Technologies Corporation Aerospace Systems (UTC) laboratory. The potential of this sensor technology for gas monitoring in PLSSs and other life support systems, and the advantages and limitations found through detailed sensor validation are discussed.


United States
Intelligent Optical Systems
United Technologies Aerospace Systems
ICES402: Extravehicular Activity: PLSS Systems
Vienna, Austria
Jesús Delgado-Alonso, Intelligent Optical Systems, Inc., USA
Straun Phillips, Intelligent Optical Systems, Inc., USA
David Berry, Intelligent Optical Systems, Inc., USA
Paul DiCarmine, Intelligent Optical Systems, Inc., USA
Cinda Chullen, NASA Lyndon B. Johnson Space Center, USA
The 46th International Conference on Environmental Systems was held in Vienna, Austria, USA on 10 July 2016 through 14 July 2016.


Miniature optic gas sensors (MOGS), luminescent, Near-Infrared-based gas sensor systems, portable life support system (PLSS), Non-Dispersive Infrared (NDIR), gas sensors, multi-gas sensor, Intelligent Optical Systems, United Technology Corporation Aerospace Systems, Johnson Space Center, gas monitoring