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Smoke Alarms - Photoelectric Smoke Alarms and Ionization Smoke Alarms

Smoke detectors have two commonly recognized smoke detection technologies; these are "photoelectric smoke detection" and "ionization smoke detection". Photoelectric smoke alarms aim a light source into a sensing chamber, angled away from the sensor. If smoke enters the chamber it reflects light onto the light sensor, this triggers the alarm to go off. Ionization smoke alarms contain a small amount of radioactive material between two electrically charged plates. This "ionizes" the air, causing current to flow between the two plates. If smoke enters the chamber it reduces the flow of current by disrupting the flow of ions, triggering the alarm to go off. In simple terms photoelectric smoke detectors are more responsive to "smoldering fires" (fires that begin with a long period of smoldering) and ionization smoke detectors are more responsive to "flaming fires". Dual sensing smoke alarms include both photoelectric and ionization technology in one single device, offering best protection.

First Alert is a leading manufacturer of quality photoelectric smoke alarms, dual sensing alarms and combination smoke and carbon monoxide alarms.

Here is our 2013 First Alert selection of smoke alarms listed by technology in best-selling order.

Dual Sensing Photoelectric and Ionization Alarms

First Alert Smoke Alarm SA320CN: Smoke Alarm with Smart Sensing Technology and Nuisance Resistance
First Alert Dual Sensing Smoke Alarm 3120B:120VAC Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup

First Alert Photoelectric Smoke Alarms

First Alert Hardwired Photoelectric Smoke Alarm 7010B: Hardwired Photoelectric Smoke Alarm with Battery Backup
First Alert Smoke Alarm SA710CN: Photoelectric Sensor Smoke Alarm
First Alert Smoke Alarm SA501CN2-3ST: Onelink Wireless Battery Operated Smoke Alarm Twin Pack
First Alert Smoke Alarm SA521CN-3ST: Onelink Wireless Hardwired Smoke Alarm
First Alert Smoke Alarm SA511CN2-3ST: Onelink Wireless Battery Operated Smoke Alarm With Voice Location Twin Pack
First Alert Smoke Alarm SA720CN: Photoelectric Sensor Smoke Alarm with Escape Light
First Alert Smoke Alarm SA501CN-3ST: Onelink Wireless Battery Operated Smoke Alarm
First Alert Smoke Alarm SA710LCN: Long Life Photoelectric Sensor Smoke Alarm

Combination Smoke and Carbon Monoxide Alarm

First Alert Smoke/Monoxide Alarm SC9120B: Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery Backup
First Alert Smoke/CO Alarm SCO501CN-3ST: Onelink Wireless Talking Battery Operated Smoke & Carbon Monoxide Alarm
First Alert Smoke and CO Alarm SCO7CN: Talking Combination Smoke and Carbon Monoxide Alarm
First Alert Smoke and CO2 Voice Alarm: First Alert Child Awakening Combo Smoke & CO Alarm, SC07CN-C
First Alert Smoke and CO Alarm SCO5CN: Combination Smoke and Carbon Monoxide Alarm
First Alert Smoke/Monoxide Alarm SCO501B2: Onelink Wireless Talking Battery Operated Smoke & Carbon Monoxide Alarm - 2pk
First Alert Combo Pack CO400 / SA303: Carbon Monoxide and Smoke Detector (Combo Pack)
First Alert Smoke and CO2 Voice Alarm: First Alert Child Awakening Combo Smoke & CO Alarm, 2pk SC07CN-C2

Smoke alarms save lives! Protect your loved ones; invest in quality First Alert Dual Sensing Photoelectric and Ionization Alarms, First Alert Photoelectric Fire Alarms and First Alert Combination Smoke and Carbon Monoxide Alarms from the official FirstAlertStore.com.



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