Top 6 BRK 4120b Smoke Detector Replacement – Smoke Detectors & Fire Alarms

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1. FIRST ALERT

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First Alert BRK9120b6CP Hardwired Smoke Detector with Backup Battery

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FIRST ALERT #ad - Can connect to other compatible BRK or first alert smoke detectors, to ensure all alarms will sound when smoke is detected. 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.

Keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there's a power failure. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm.

To ensure complete protection make sure to place one on each level of your home and in each bedroom. Rigorously tested to meet ul standards120 volt AC power with 9V battery backup to keep alarm functioning during power outage. 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.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height2.2 Inches
Length5.6 Inches
Weight0.05 Pounds
Width5.6 Inches
Part Number9120BFF
Model9120B
Warranty10 Year Limited

2. FIRST ALERT

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First Alert BRK SC9120B Hardwired Smoke Detector and Carbon Monoxide CO Detector with Battery Backup

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FIRST ALERT #ad - Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection. 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.

Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. 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. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.

Rigorously tested to meet UL standards. 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. 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.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height1.9 Inches
Length5.6 Inches
Weight0.25 Pounds
Width5.6 Inches
Part NumberSC9120B
ModelSC9120B
Warranty7 Year Limited

3. FIRST ALERT

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First Alert BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup 4 Pack

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FIRST ALERT #ad - Test/silence button. Tamper resistant locking pins - Universal mounting bracket. Side load battery drawer. Latching alarm indication. 120v ac with battery backup.
BrandFIRST ALERT #ad
ManufacturerBRK #ad
Part Numberna
Model9120B

4. FIRST ALERT

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First Alert BRK 7010B Hardwired Smoke Detector with Photoelectric Sensor and Battery Backup

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FIRST ALERT #ad - Backed by 10 year limited warranty and tested to meet UL 217 standards. Inter connectable with BRK and first alert hardwired smoke and carbon monoxide alarms. 120 volt hardwire smoke alarm with photoelectric sensor and battery backup. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. 85 decibel alarm. Intuitive latching alarm indicator identifies which unit triggered alarm. Features convenient 9 volt battery backup, dust cover, silence/test button, 85 decibel alarm.
BrandFIRST ALERT #ad
ManufacturerBRK Brands #ad
Height5.13 Inches
Length5.13 Inches
Weight0.8 Pounds
Width5.13 Inches
Part Number7010B
Model7010B

5. FIRST ALERT

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First Alert BRK 9120B Hardwired Smoke Alarm with Battery Backup 3

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FIRST ALERT #ad - Imported. Tamper resistant locking pins, single button silence test and loud 85dB alarm. 120-volt ac power with 9-Volt battery backup included to keep alarm functioning during power outage.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad

6. FIRST ALERT

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First Alert 9120B 120 Volt Hardwired Smoke Alarm With Battery Back Up 5 Pack

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FIRST ALERT #ad - 120-volt ac power with 9-Volt battery backup included to keep alarm functioning during power outage. Imported. Tamper resistant locking pins, single button silence test and loud 85dB alarm.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad