What is the Difference Between Ionization and Photoelectric Smoke Alarms?

There are two main types of smoke alarms – ionization and photoelectric. Learning the difference can help you make the best choice for home or business.
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USI Hardwired Ionization Smoke and Fire Detector with Battery Backup - 5304

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The Best Smoke Detector for Your Home, and the Worst

While all smoke alarms are designed to detect smoke, different sensing technologies react differently to certain types of fires. The Fist Alert SA3210

First Alert Dual Sensor Photoelectric/Ionization Smoke and Fire Alarm with 10-Year Sealed Battery - SA3210 (1039842)

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First Alert Ionization Smoke Sensor with Alarm White 0827B - Best Buy

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First Alert Hard-Wired w/Battery Back-up Ionization/Photoelectric Dual Sensor Smoke Detector - Ace Hardware

Photoelectric vs Ionisation Smoke Alarms - Detector Inspector