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Compact Chemical Monitor for Silver Ions in Spacecraft Water Systems, Phase I

Metadata Updated: November 12, 2020

NASA has identified silver ions as the best candidate biocide for use in the potable water system on next-generation spacecraft. Though significant work has been conducted to develop systems for controlled release silver ions in the water systems, there is no sensor for continuous in-line monitoring of the concentration of silver in the water used by the crew, nor a reliable device to analyze silver in space. Intelligent Optical Systems plans to develop a luminescent indicator-based optical sensor probe to monitor silver concentration directly in spacecraft water systems in real time. The proposed sensor will be based on a technology recently demonstrated by IOS for monitoring wastewater in space systems, in which a specific indicator dye is copolymerized with a stable polymer matrix, resulting in highly sensitive and stable sensor elements. The capability of indicator-doped polymer matrixes to detect silver in the ISS has been demonstrated by NASA and its partners, but further development is required to achieve in-line stand-alone monitoring. Our monitor will incorporate robust sensor elements, interrogated via a compact, low-power optoelectronic unit. The proposed sensor elements will be remotely connected to the electronic circuitry by an electromagnetic interference (EMI)-proof optical fiber cable, allowing flexibility in placing the sensor system, where space is highly valuable. In Phase I we will develop novel sensor elements for silver, and will demonstrate sensitivity, measurements range, and stability. In Phase II, in collaboration with UTC, we will produce prototypes for integration into the ISS Potable Water Systems, and conduct extensive testing under simulated environmental conditions, culminating in delivery to NASA of a monitoring system, bringing the monitor to TRL 7.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_93415
Data First Published 2017-12-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
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Harvest Object Id 6327fe2d-e9ed-44df-8577-493cd68e15b4
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash e2cdffbc7a1cff3c7260d7800d2d0d7a715f1983
Source Schema Version 1.1

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