KnowraSmoke detectorLinked fromLinked fromThe 7 pages that link to Smoke detector, each with the reason it gives.All 7Broader topic 2Related 4Narrower topic 1Alpha decayRelated: Many such detectors use alpha-emitting americium-241 to ionize air.Alpha particleRelated: Some ionization smoke detectors use an alpha-emitting americium source.Fire alarm systemRelated: Smoke detectors provide a common first signal to the system’s control equipment.PhototubeRelated: Some early photoelectric smoke detectors used a light source and phototube to sense scattered light.