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Simple to use, with a single test/silence button, and side load battery compartment tamper resistant locking brackets and universal mounting brackets make installation easy. Keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there's a power failure.
Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm. First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018.


Rigorously tested to meet UL standards. Simple to use, with a single test/silence button, and side load battery compartment; tamper resistant locking brackets and universal mounting brackets make installation easy.
Features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor for smoke detection. First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018.




Top 7 BRK 9120B Smoke Alarm – Smoke Detectors & Fire Alarms
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1. FIRST ALERT
#ad
First Alert BRK9120b6CP Hardwired Smoke Detector with Backup Battery
#adFIRST ALERT #ad - Can connect to other compatible BRK or first alert smoke detectors, to ensure all alarms will sound when smoke is detected. To ensure complete protection make sure to place one on each level of your home and in each bedroom.Simple to use, with a single test/silence button, and side load battery compartment tamper resistant locking brackets and universal mounting brackets make installation easy. Keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there's a power failure.
More information #ad
Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Rigorously tested to meet ul standards120 volt AC power with 9V battery backup to keep alarm functioning during power outage. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm. First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.2 Inches |
Length | 5.6 Inches |
Weight | 0.05 Pounds |
Width | 5.6 Inches |
Part Number | 9120BFF |
Model | 9120B |
Warranty | 10 Year Limited |
More information #ad
2. FIRST ALERT
#ad
First Alert BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup 4 Pack
#adFIRST ALERT #ad - 120v ac with battery backup. Tamper resistant locking pins - Universal mounting bracket. Latching alarm indication. Test/silence button. Side load battery drawer.More information #ad
Brand | FIRST ALERT #ad |
Manufacturer | BRK #ad |
Part Number | 9120B |
Model | 9120B |
More information #ad
3. FIRST ALERT
#ad
First Alert BRK SC9120B Hardwired Smoke Detector and Carbon Monoxide CO Detector with Battery Backup
#adFIRST ALERT #ad - Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected.Rigorously tested to meet UL standards. Simple to use, with a single test/silence button, and side load battery compartment; tamper resistant locking brackets and universal mounting brackets make installation easy.
More information #ad
Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure. Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection. Features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor for smoke detection. First alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 Based on a First Alert Brand Trust Survey in February 2018.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 1.9 Inches |
Length | 5.6 Inches |
Weight | 0.5 Pounds |
Width | 5.6 Inches |
Part Number | SC9120B |
Model | SC9120B |
Warranty | 7 Year Limited |
More information #ad
4. FIRST ALERT
#ad
First Alert 9120B Hardwired Smoke Alarm with Battery Backup, pack of 6
#adFIRST ALERT #ad - Latching alarm indicator - Remembers which unit initiated an alarm. Silence feature - Silences nuisance alarms. Generally more effective at detecting small particles produced by flaming fires.More information #ad
Perfect for apartment, dormitory or hotel applications. Dual ionization - dual ionization sensing chamber. Sources may include paper or kitchen grease. Approved for rv use. Two locking features - pins are provided to lock battery drawer and/or alarm to base.Brand | FIRST ALERT #ad |
Manufacturer | First Alert / BRK Brands, Inc. #ad |
Height | 2.2 Inches |
Length | 5.6 Inches |
Weight | 1 Pounds |
Width | 5.6 Inches |
Part Number | 9120B |
Model | 9120B |
Warranty | na |
More information #ad
5. Kidde
#ad
Kidde i12040 120v Ac/dc Smoke Alarm w/ Battery Back up Lot of 6 by KIDDE
#adKidde #ad - Tamper resist locking pin helps deter alarm tampering and theft. Ul approved. Battery backup 9V battery included. One touch test button tests unit's electronic circuitry. Hush feature temporarily silences nuisance alarms.More information #ad
Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Part Number | i12040 |
Model | i12040 |
More information #ad
6. BRK
#ad
COLOR, BRK First Alert 9120B 120-Volt Wire-In With Battery Backup Smoke Alarm, 12-Pack
#adBRK #ad - 120v ac with battery backup. Latching alarm indication. Side load battery drawer. Tamper resistant locking pins - Universal mounting bracket. Test/silence button.More information #ad
Brand | BRK #ad |
Manufacturer | BRK #ad |
Height | 5.7 Inches |
Length | 5.6 Inches |
Weight | 0.05 Pounds |
Width | 5.7 Inches |
Part Number | 9120B |
Model | 9120B |
Warranty | NA |
More information #ad
7. FIRST ALERT
#ad
First Alert SA9120BPCN Smoke Alarm
#adFIRST ALERT #ad - Backup battery drawer allows for quick and convenient access on the side. Smoke alarm is wired directly into your home's electrical system.More information #ad
Ionization smoke sensor, optimal smoke detection from flaming fires. Will continue functioning in the event of a power outage. Comes with a 10-year limited warranty.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 1.25 Inches |
Length | 5.25 Inches |
Width | 5.25 Inches |
Part Number | 1039809 |
Model | SA9120BPCN |
More information #ad