NDLI: Flight hydrogen sensor for use in the iss oxygen generation assembly

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Flight hydrogen sensor for use in the iss oxygen generation assembly

Content Provider	NASA Technical Reports Server (NTRS)
Author	MSadoques Jr., George Makel, Darby B.
Copyright Year	2005
Description	This paper provides a description of the hydrogen sensor Orbital Replacement Unit (ORU) used on the Oxygen Generation Assembly (OGA), to be operated on the International Space Station (ISS). The hydrogen sensor ORU is being provided by Makel Engineering, Inc. (MEI) to monitor the oxygen outlet for the presence of hydrogen. The hydrogen sensor ORU is a triple redundant design where each sensor converts raw measurements to actual hydrogen partial pressure that is reported to the OGA system controller. The signal outputs are utilized for system shutdown in the event that the hydrogen concentration in the oxygen outlet line exceeds the specified shutdown limit. Improvements have been made to the Micro-Electro-Mechanical Systems (MEMS) based sensing element, screening, and calibration process to meet OGA operating requirements. Two flight hydrogen sensor ORUs have successfully completed the acceptance test phase. This paper also describes the sensor s performance during acceptance testing, additional tests planned to extend the operational performance calibration cycle, and integration with the OGA system.
File Size	14822096
Page Count	9
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20050207487
Archival Resource Key	ark:/13960/t8cg4pf39
Language	English
Publisher Date	2005-01-01
Access Restriction	Open
Subject Keyword	Spacecraft Instrumentation And Astrionics Microelectromechanical Systems Controllers International Space Station Partial Pressure Hydrogen Calibrating Gas Detectors Oxygen Production Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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