Ionization detectors have a small amount of _____ material in the sensing chamber.
Understand the Problem
The question is asking for the type of material that ionization detectors contain in their sensing chamber, and it provides multiple-choice options.
Answer
radioactive material
The final answer is radioactive material.
Answer for screen readers
The final answer is radioactive material.
More Information
Ionization smoke detectors use a small amount of radioactive material, typically americium-241, to detect smoke. The radiation ionizes the air, making it conductive, which helps detect smoke particles.
Tips
Ensure not to confuse the type of material used in ionization detectors with other materials that might sound similar.
Sources
- Ionization vs photoelectric - NFPA - nfpa.org
- Americium in Ionization Smoke Detectors | US EPA - epa.gov
- The Facts About Smoke Detector Radiation from Americium 241 - support.firstalert.com
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