MAKEL ENGINEERING, INC. (MEI) PROPOSES TO DEVELOP HIGH TEMPERATURE, SOLID STATE SENSORS TO MONITOR CARBON DIOXIDE (CO2) AND NITROGEN (N2) IN THE VENUS ATMOSPHERE. A HARSH ENVIRONMENT CHEMICAL SENSOR ARRAY SUITABLE FOR MEASURING KEY TRACE SPECIES IN THE VENUS ATMOSPHERE HAS BEEN DEVELOPED BY MEI UNDER A RECENT SBIR PROGRAM. CURRENTLY THERE ARE NO DEMONSTRATED CHEMICAL MICROSENSORS SUITABLE TO MEASURE THE TWO MOST ABUNDANT SPECIES (CO2 ~ 97% AND N2~ 3%) IN THE VENUS ATMOSPHERE AT HIGH PRESSURE AND HIGH TEMPERATURE CONDITIONS (CO2 AND N2 EXIST AS SUPERCRITICAL FLUIDS NEAR VENUS SURFACE). THE PROPOSED AMPEROMETRIC AND POTENTIOMETRIC SENSORS ARE COMPATIBLE WITH SILICON CARBIDE (SIC) ELECTRONICS UNDER DEVELOPMENT FOR VENUS CHEMICAL SENSING INSTRUMENTS, COMPLEMENTING RECENT AND ONGOING EFFORTS TO SUPPORT VENUS ATMOSPHERIC ANALYSIS. FUTURE MISSIONS WHICH MAY DESCENT THROUGH THE ATMOSPHERE AND OPERATE ON THE SURFACE OF VENUS MEASURING THE COMPOSITION OF THE ATMOSPHERE WOULD BENEFIT FROM THIS NEW CAPABILITY TO ACCURATELY MEASURE SMALL VARIATIONS OF N2 AND CO2 CONCENTRATION.

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