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Best brk carbon monoxide detectors - Holiday Sale 2025

Last Updated - December 14, 2025

1
Best Choice
39% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert
39% Off

FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3

First Alert

$128.00

$209.99
(39% Off)

More Details
Main highlights
- 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. Dust cover
- Keep your family safe with this 3-pack of 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 that detects the fine particles of a fast-burning fire
- Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected
$128.00
$209.99 (39% Off)
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

FIRST ALERT Plug-In Carbon Monoxide Detector, 3 Count (Pack of 1), CO600 , White, 6.75 x 6.9 x 9 inches

First Alert

$74.37

More Details
Main highlights
- To ensure complete protection make sure to place one on each level of your home and in each bedroom
- Keep your family safe from carbon monoxide in multiple rooms with this convenient plug-in carbon monoxide alarm 3-pack; the alarms work with any standard outlet
- Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room
- All First Alert CO alarms are rigorously tested to meet UL standards
- A loud 85-decibel alarm sounds when Carbon Monoxide levels reach dangerous levels.Never use water, cleaners, or solvents, sincethey may damage the unit
$74.37
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White

First Alert

$39.49

More Details
Main highlights
- Plastic
- Microprocessor controlled to minimize false alarms
- Imported
- Electrochemical sensor accurately detects carbon monoxide
- 120 volt hard wired carbon monoxide alarm wires directly into your home's electrical system
$39.49
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert BRK CO250RVA RV Approved CO Alarm

First Alert

$37.99

More Details
Main highlights
- Tamper Resistant Locking Pin? locks alarm to base to prevent removal of battery. Perfect if you rent your RV.
- Silence Feature - Silence unwanted alarms. Test alarm with the same button.
- RV Approved - Approved for use in recreational vehicles
- Original BRK Replacement CO Alarm - Replaces the original BRK alarm that came with your RV, model CO250RVA
- Hinged Cover Design - Allows for fast, easy installation and battery replacement
$37.99
5
Best Value
30% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert
30% Off

First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup

First Alert

$64.98

$92.99
(30% Off)

More Details
Main highlights
- Superior carbon monoxide sensor and dual ionization smoke alarm
- Simple to use silence/test button; separate smoke and CO latching alarm indicators
- Inter-connectable with BRK and First Alert hardwired smoke and carbon monoxide alarms
- Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
- Easy to install universal mount bracket
- 9-volt battery included; 10-year limited warranty
$64.98
$92.99 (30% Off)

Best brk carbon monoxide detectors - Holiday Sale 2025

FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3

FIRST ALERT Plug-In Carbon Monoxide Detector, 3 Count (Pack of 1), CO600 , White, 6.75 x 6.9 x 9 inches

First Alert BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White

First Alert BRK CO250RVA RV Approved CO Alarm

First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup

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