First alert smoke and carbon monoxide alarm sc9120b

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Hardwired Smoke Alarm with Battery Backup - 9120B

Ionization Wired In Smoke Detector

Your Price: $12.95  Save: $7.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Hardwired Combination Smoke/Carbon Monoxide Alarm with Battery Backup - SC9120B

Combo Wired In Smoke & CO Detector

Your Price: $54.95  Save: $15.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Basic Battery Operated Carbon Monoxide Alarm - CO400 (1039718)

Battery Operated Carbon Monoxide Detector

Your Price: $21.95  Save: $8.00

Availability: In Stock  Read reviews (171)

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First alert smoke and carbon monoxide alarm sc9120b

First Alert BRK Brands Hardwired 120-Volt AC/DC Heat Alarm with Battery Backup - HD6135FB

135 degrees Fahrenheit warning and rate-of-rise sensing

Your Price: $28.95  Save: $11.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Smoke Alarm with Smart Sensing Technology and Nuisance Resistance - SA320CN (1039828)

Dual Sensing Battery Operated Smoke Detector

Your Price: $28.95  Save: $11.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Slim Design Battery-Operated Photoelectric Smoke & Fire Alarm - PR700 (1039772)

Photoelectric Battery Operated Smoke Detector

Your Price: $18.95  Save: $11.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Basic Plug-In Carbon Monoxide Alarm - CO600 (1039730)

Plug-In Carbon Monoxide Detector

Your Price: $24.95  Save: $15.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert BRK Brands Hardwired Ionization Smoke Alarm with 10-Year Battery Backup - 9120LBL

10 Year Battery Smoke Detector

Your Price: $28.95  Save: $11.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert 10-Year Sealed Battery Combo Photoelectric Smoke & Carbon Monoxide Alarm with Slim Design - PRC710 (1039868)

Combo 10 Year Battery Smoke & CO Detector

Your Price: $54.95  Save: $15.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert 10-Year Sealed Battery Photoelectric Smoke Alarm with Slim Design - PR710 (1039852)

Photoelectric 10 Year Battery Smoke Detector

Your Price: $30.95  Save: $9.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Basic Battery Operated Smoke Alarm - SA303CN3 (1039796)

Ionization Battery Operated Smoke Detector

Your Price: $12.95  Save: $7.00

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First alert smoke and carbon monoxide alarm sc9120b

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

Dual Sensing 10 Year Battery Operated Smoke Detector

Your Price: $56.95  Save: $23.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Hardwired Photoelectric Smoke and Carbon Monoxide Alarm with Battery Backup - SC7010B

Combo Wired In Smoke & CO Battery Detector

Your Price: $64.95  Save: $25.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Compact 10 Year Combo Photoelectric Smoke & Carbon Monoxide Alarm with Voice & Location Feature - PRC710V (1039871)

Combo 10 year Battery Smoke & CO Voice Detector

Your Price: $59.95  Save: $20.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Hardwired Hearing Impaired LED Strobe Light - SLED177 (1038510)

Interconnects with First Alert smoke, heat and CO alarms

Your Price: $77.95  Save: $22.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Hardwired Photoelectric Smoke Alarm with Battery Backup - 7010B

Photoelectric Wired In Smoke Detector

Your Price: $29.95  Save: $10.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert BRK Brands Hardwired Combo Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup - SC9120LBL

Combo Wired In Smoke & CO Battery Detector

Your Price: $70.95  Save: $19.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Heavy Duty Bracket for 10-Pound Fire Extinguisher - BRACKET10

Designed for use with large 10-pound fire extinguishers

Your Price: $25.95  Save: $14.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Wireless Interconnect Battery Operated Smoke Alarm With Voice Location - SA511B

State of the art wireless talking smoke alarm

Your Price: $45.95  Save: $14.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Wireless Interconnect Talking Battery Operated Smoke & Carbon Monoxide Alarm - SCO501CN-3ST (1039839)

Combo Battery Smoke & CO Voice Detector

Your Price: $82.95  Save: $27.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Wireless Interconnect Hardwired Smoke Alarm - SA521CN-3ST (1039830)

Photoelectric Wired In Interconnected Smoke Detector

Your Price: $69.95  Save: $20.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display - GCO1CN (1039760)

Plug-In Carbon Monoxide & Gas Detector

Your Price: $59.95  Save: $20.00

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First alert smoke and carbon monoxide alarm sc9120b

First Alert Hardwired LED Strobe Light Smoke Alarm with 10-Year Sealed Battery - 7020BSL (1038335)

Photoelectric Smoke Alarm & Strobe Light

Your Price: $112.95  Save: $37.00

Availability: In Stock  Read reviews (3)

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First alert smoke and carbon monoxide alarm sc9120b

Radon Test Kit, First Alert - RD1

Safe and easy to use, takes only minutes

Your Price: $17.95  Save: $12.00

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How long does First Alert SC9120B last?

Product: SC9120B. Why Replace Smoke Alarms Every 10 Years? Learn why the NFPA recommends that smoke alarms be replaced every 10 years (at least). Learn how to tell if the old alarms in your home are still protecting you.

What is difference between 9120b and SC9120B?

A: The sc9120b is for smoke and carbon monoxide detection the 9120b is just for smoke detection.

How do I reset my First Alert SC9120B?

Open the cover and take out the battery. Press and hold the test button for 15-30 seconds. This will fully reset the smoke alarm and drain any charge left inside.

Why is my First Alert carbon monoxide detector beeping?

1 Beep Every Minute: Low Battery. It is time to replace the batteries in your carbon monoxide detector. 5 Beeps Every Minute: End of Life. This type of chirp indicates it is time to replace your carbon monoxide alarm.