Multispecies Single Light-Emitting Diode Mid-Infrared Gas Sensor for Space Habitats and Vehicles

To further extended deep space exploration missions, both through commercial space endeavors and through government-funded opportunities, the hazard of toxic gas accumulation onboard space vehicles must be quickly resolved to ensure mission success. Such events can occur due to fire events or fuel/oxidizer leaks. Several hazardous gases that are present in a space environment have absorption features in the mid-infrared range and thus can be detected and quantified via absorption spectroscopy. This work presents a benchtop sensor that utilizes a 4.2 mu m light-emitting diode and a rotating diffraction grating to detect both carbon dioxide and nitrous oxide. Subsequent works will focus on adding further species of interest and post benchtop testing.