The two types of smoke detectors most commonly encountered in the United States are ionization detectors and photoelectric detectors. Ionization-type smoke detectors contain a very tiny amount of radioactive material. Photoelectric-type smoke detectors do not contain any radioactive material. Combination smoke detectors, which contain both ionization and photoelectric smoke sensors, also contain a very tiny amount of radioactive material.
Depending on where you live and what type of fire or smoke detector you need to dispose of, there may be regulations that apply to the disposal of scrap detectors.
Download the guidance below to learn how to tell if your fire/smoke detectors contain radioactive material and how to safely store and/or dispose of them.
Last Reviewed: July 10, 2012
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Fire/Smoke Detector Disposal