Produced by Beckman Instruments Advanced Technology Operations (ATO) in 1971 for NASA's Skylab Program, this system measured carbon dioxide partial pressure, dew point, and ambient gas temperature. Its battery contained enough energy to take two, five-minute readings every day of Skylab's 28-day mission. This system did fly on the Skylab spacecraft mission. Note that the photograph was originally labeled "Apollo CO2/Dew Point Monitor" although other information in the collection indicates this was manufactured for Skylab.
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