|Item Weight||13.6 ounces|
|Product Dimensions||5.7 x 5.7 x 2.4 inches|
|Item model number||3120FF|
|Batteries||2 AA batteries required. (included)|
|Item Package Quantity||1|
|Average Battery Life||8760 hours|
|Warranty Description||10 Year Limited|
Other Sellers on Amazon
+ Free Shipping
First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup
Want this professionally installed?
- Service provided by a local pro
- Estimate is for installation of 1 detector
- Installing customer-supplied mounting plate
- Running wiring to mounting location
- Wiring alarm and attaching to mounting plate
- Installing backup batteries as needed and testing device
- Pro will contact you within 1 business day to schedule
- Kick back and only pay when the job is done
- Backed by Amazon's Happiness Guarantee
- Book the service directly on Amazon
- Receive confirmation within 1 business day
- Backed by Amazon's Happiness Guarantee
- Enter your model number to make sure this fits.
- Hardwired alarm includes battery backup for power outages.This unit has 2 tabs on the top of the battery drawer. Simply press down on the tab and the battery will eject.refer the user manual.
- Photoelectric and ionization sensors provide comprehensive fire detection
- A single button makes alarm easy to test monthly or silence during a false alarm
- Two latching features help indicate a low battery or the originating alarm in a system
- Optipath 360 patented technology provides 360 degrees of access to the smoke alarm
Find our Black Friday and everyday Tools and Home Improvement deals Learn more
Frequently bought together
Customers who bought this item also bought
Have a question?
Find answers in product info, Q&As, reviews
Please make sure that you are posting in the form of a question.
From the manufacturer
At a Glance:
- Photoelectric and ionization sensors for comprehensive smoke and fire detection
- Hardwired alarm includes battery backup for power outages
- Single button to test detector monthly or silence during a false alarm
- Latching features indicate low battery or originating alarm in a system
- Patented Optipath 360 technology provides 360 degrees of access
First Alert BRK 3120B Dual Photoelectric and Ionization Sensor Smoke Alarm
The First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup is designed to provide peace of mind. The smoke detector features photoelectric and ionization sensors that detect not just fast-flaming fires, but smoldering ones, providing a more comprehensive detection of fires. The Dual Sensor Smoke Alarm is hardwired and comes with a battery backup in the event of a power outage. Two latching features and a one-touch silence/test button make this fire alarm easy to operate.
What's in the Box:
- First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm
- 2 AA batteries
- Mounting bracket with hardware
- Owner's manual
Dual Sensors Detect Two Kinds of Fire
The First Alert Dual Sensor Smoke Alarm features photoelectric and ionization sensors for increased detection. The photoelectric sensor detects smoldering fires from objects like cigarettes burning on furniture or in trash cans, while the ionization sensor detects fast-flaming fires like erupting kitchen grease fires or combustibles. The dual sensors on this fire detector provide you and your family with the earliest warning possible.
Designed for Fewer False Alarms
Smoke from cooking or even shower steam can sometimes set off a smoke alarm. The photoelectric sensor on the First Alert Dual Sensor Smoke Alarm is sensitive to smoldering fires while reducing false alarms. The photoelectric sensor is smart enough to distinguish real threats from everyday activities, resulting in fewer annoying false alarms.
Battery Backup for Detection in a Power Outage
The fire detector is hardwired, but it also features a battery backup to help ensure the smoke alarm can still function in the event of a power outage. The unit requires two AA batteries, and comes with a low-power indicator to alert you when they need to be replaced. A one-touch silence/test button makes it easy to test the detector monthly or silence it during a false alarm.
Optipath 360 and Interconnectivity for Larger Spaces
The First Alert Dual Sensor Smoke Alarm easily connects to other compatible hardwired alarms, making it the perfect solution for larger buildings such as institutions, dormitories, hotels, and other multi-family dwellings that use single station smoke detectors. The smoke and fire detector includes patented Optipath 360 technology that provides 360 degrees of access to the alarm, and its 85-decibel siren is designed to be loud enough to awaken even the soundest of sleepers.
About First Alert
For nearly 60 years, First Alert has been a leading innovator in the home safety industry, helping its customers protect what matters most. From smoke detectors and carbon monoxide alarms to security cameras and safes, the company manufactures reliable, technologically advanced products that offer a sense of preparedness and peace of mind. First Alert also takes pride in community outreach and has maintained a longstanding commitment to fire service support and safety awareness.
|SA521CN Wireless Smoke Alarm||BRK 3120B Dual Photoelectric and Ionization Sensor Smoke Alarm||BRK SC7010BV Talking Photoelectric Smoke and Carbon Monoxide Alarm|
|Photoelectric Smoke Sensor||✓||✓||✓|
|Ionization Fire Sensor||✓|
|Carbon Monoxide (CO) Sensor||✓|
|Hardwired with Battery Backup||✓||✓||✓|
Compare to similar items
|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Item Dimensions||5.7 x 5.7 x 2.4 in||5.7 x 5.7 x 2.4 in||5.6 x 5.6 x 2.2 in||7.3 x 7.8 x 2.8 in||2 x 6 x 6 in||2.6 x 6.6 x 10 in|
|Item Weight||—||—||0.8 ounces||0.9 lb||—||3.2 ounces|
|Size||—||1 Pack||1 Pack||1-Pack||1-Pack||—|
The First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup is designed to provide peace of mind. It features photoelectric and ionization sensors that detect not just fast-flaming fires, but also smoldering ones. The 85-decibel fire alarm has two latch options to indicate a low battery or the originating alarm in a system. It also offers a one-touch silence/test button and can connect to other compatible hardwired alarms for expanded coverage. This smoke detector includes Optipath 360 patented technology that provides 360 degrees of access to the smoke alarm, as well as a battery backup for power outages.
Top customer reviews
There was a problem filtering reviews right now. Please try again later.
More importantly, though, the user manual was incomplete. We had an annoying low battery warning (one chirp per minute) on new batteries and a three-month-old unit, but went ahead and replaced them anyway - it didn't stop the chirp. A call to First Alert helped - the CS guy asked if we'd tried a reset, yet. He admitted the procedure wasn't in all of the enclosed manuals.
Here's the Reset procedure: remove detector from bracket, disconnect from house power (we needed a flat screwdriver to release plug latch), remove batteries, close battery tray, press and hold test button for 15 seconds, reinstall batteries and close tray (it will chirp), reconnect to house power, reinstall detector in bracket on ceiling or wherever, press Test button to ensure everything's hooked up and functioning. That did fix our "low battery" chirp.
So far so good. I've been living with them installed for about a week and so far, no false alarms as others have reported. My only criticism thus far is that the color is ARCTIC white as opposed to off-white, so for those of us with more modern flat or matte ceiling colors these detectors tend to stand out more than Kidde models. Refer to my pic to see the color difference. Wish First Alert would make an off-white version.
The reason for docking a star was the dead batteries and lack of mounting hardware. I purchased the non-hardwired version of this product, and it came with good batteries and mounting hardware for $10 less than this model.