HYDRAZINE, A VOLATILE AND FLAMMABLE COLORLESS LIQUID, IS CLASSIFIED AS A CARCINOGEN BY THE US ENVIRONMENTAL PROTECTION AGENCY. IT CAN CAUSE CHROMOSOME ABERRATIONS NEGATIVELY AFFECTING THE LUNGS, LIVER, SPLEEN, THYROID GLAND, AND CENTRAL NERVOUS SYSTEM. NASA S EXISTING HYDRAZINE MEASUREMENT TECHNOLOGY IS SENSITIVE, SELECTIVE AND RELIABLE, BUT IT TAKES 15 MINUTES TO COLLECT AND ANALYZE A SAMPLE. FOR FUTURE MISSIONS BEYOND LOW EARTH ORBIT, NASA WILL NEED A MEASUREMENT SYSTEM THAT RESPONDS WITHIN 30 SECONDS WITHOUT ANY PERFORMANCE LIMITATIONS SUCH AS LACK OF SPECIFICITY AND MAINTENANCE CHALLENGES. TO FULFILL NASA NEEDS, INNOSENSE LLC (ISL) WILL CONTINUE DEVELOPING A SPACE-WORTHY MICRO-ELECTROANALYTICAL SENSOR FOR RAPID MONITORING OF HYDRAZINE (MICRO-ZIN ) IN THE PRESENCE OF AMMONIA IN SPACECRAFT CABIN ATMOSPHERE (SCA) FOR LONG-TERM PERFORMANCE WITHOUT MAINTENANCE. IN PHASE I, ISL DEVELOPED A COMPACT MICRO-ZIN WORKING MODEL AND DEMONSTRATED ITS PERFORMANCE DETECTING HYDRAZINE WITH HIGH SENSITIVITY AND SELECTIVITY OVER AMMONIA, FAST RESPONSE TIME (T90>30 SECONDS), REVERSIBILITY, CYCLABILITY AND REPRODUCIBILITY UNDER NASA-REQUIRED SCA CONDITIONS, MEETING OR EXCEEDING PERFORMANCE TARGETS. IN PHASE II, ISL WILL FOCUS ON OPTIMIZATION AND SCALE-UP OF MICRO-ZIN FOLLOWING FINE-TUNING OF PERFORMANCE AND ANALYZING LIFE EXPECTANCY BY RIGOROUS TESTING. COMPLEX MODELING, PACKAGE DESIGN, AND CONSTRUCTION OF A MICRO-ZIN PROTOTYPE FOR SCA-LEVEL TESTING ARE ALSO PLANNED. AT THE END OF PHASE II, A COMPACT, BATTERY-OPERATED, HANDHELD MICRO-ZIN PROTOTYPE WILL BE DELIVERED TO NASA FOR FURTHER EVALUATION.