The team of Makel Engineering, Inc. Fifth Gait Technologies, TruWeather Solutions proposes to develop a novel, high sensitivity, fast response, solid state, electrochemical carbon monoxide sensor for use in small UAVs which is capable of PPB level atmospheric measurements. The sensor is based on a thick film multi-element potentiometric micro sensor approach which has been developed by MEI. Using the same sensor design approach MEI has recently developed a highly sensitive and selective CO sensor capable of low PPB measurements for use in early fire detection and exhaust emissions. Using this novel, miniaturized sensor developed by MEI, our team proposes to develop a rugged, low cost, compact, flight capable CO sensor system payload for small UAVs which will include flight packaging, air sampling system, and control electronics.