Atmo-analyzer
this was one of the many life-support systems found on most starfighters, during the early years of the New Order. The atmo-analyzer regularly monitored the air in the ship's cabin, testing it to make sure it was safe to breathe. These devices were important on small fighters, because they were only able to contain a small volume of air, which had to be constantly scrubbed and recycled in order to be breathable by the pilot. The atmo-analyzer alerted a pilot to potential problems, especially when the main scrubbers failed or leaked harmful chemicals.