Potential NASA Commercial Applications: UAVs will see an expanded role in support NASA science missions. Recent applications for the UAV based chemical sensing currently include the study of volcanoes to validate atmospheric models and to gain new insight into mechanisms. Near term application of the technology would be to assist NASA's work studying volcanic activity such as tracking volcano emissions. The lightweight, low cost, flight capable chemical detection instrument also has application to a wide range of non UAV related NASA applications including (1) propellant leak detection propulsion systems and ground test facilities, (2) environmental monitoring in spacecraft and aircraft, (3) portable or remotely deployed early fire detection. The addition of sensors for CO, NOx and ozone would make the system suitable for monitoring aircraft onboard oxygen generation systems (OBOGS). An aircraft's OBOGS supplies proper oxygen partial pressure to the pilot and crew by conditioning and concentrating oxygen from engine bleed air. In addition to concentrating the oxygen levels, this system effectively filters out contaminants from typical bleed air supply. Problems arise when bleed air composition is substantially out of spec with elevated levels of contaminants, such as due to exhaust ingestion or oil leaks. While there are safeguards in place to ensure proper flow and pressure of the breathing supply, there are currently no warning signs or measurements indicating the concentration of toxic contaminants.