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  • BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup, Single Individual from Contractor Pack
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BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup, Single Individual from Contractor Pack

| 34 answered questions

List Price: $23.99
Price: $12.41 & FREE Shipping on orders over $35. Details
You Save: $11.58 (48%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
5.6" x 5.6" x 2"
White
  • 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
  • Open mounting design for easy installation with side load battery compartment for quick replacementv and interconnectable up to 18 units (12 smoke, 6 CO/heat/relay)
  • 10-year limited warranty
See more product details
44 new from $7.35 4 used from $10.80

Frequently Bought Together

BRK Brands 9120B Hardwired Smoke Alarm with Battery Backup, Single Individual from Contractor Pack + First Alert SC9120B Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery Backup + First Alert 9120B6CP 120-Volt Wire-In With Battery Backup Smoke Alarm, 6-Pack
Price for all three: $108.77

These items are shipped from and sold by different sellers.

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Size Name: 5.6" x 5.6" x 2" | Color Name: White
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Product Information

Size Name: 5.6" x 5.6" x 2" | Color Name: White
Technical Details
Part Number 9120B-12ST
Item Weight0.8 ounces
Product Dimensions5.6 x 5.7 x 5.7 inches
Item model number9120B
Size5.6" x 5.6" x 2"
ColorWhite
FinishWhite
MaterialSynthetic
Power Sourcebattery-powered
Item Package Quantity1
Number Of Pieces1
Batteries Included?Yes
Batteries Required?Yes
Warranty Description10-Year
  
Technical Specification
Additional Information
ASINB000BD8NTQ
Best Sellers Rank #554 in Home Improvement (See top 100)
Shipping Weight8.8 ounces (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableAugust 17, 2005
  
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Product Description

Size Name: 5.6" x 5.6" x 2" | Color Name: White

Amazon.com

Introducing the revolutionary BRK 9120 series smoke alarms which have been redesigned from the ground up. They install faster, perform better, and are even smarter than before. All of these improvements help reduce nuisance alarms and save you time and money. BRK Electronics smoke alarms are designed to be easy to install, easy to maintain, and quality-engineered for years of virtually maintenance-free service.

The 9120B AC-powered smoke alarm with battery backup includes these features:

  • Ionization sensor which helps detect fast flaming fires that consume combustible materials rapidly.
  • 120-volt AC inter-connectable (with maximum 18 compatible devices). The alarm can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Power indicators show which unit in the series initiated the alarm.
  • Latching alarm indicator which automatically identifies which unit initiated the alarm.
  • Smart technology to reduce nuisance alarms.
  • 9-volt battery backup for peace of mind during power malfunction.
  • Single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality.
  • Perfect mount system including a gasketless base for easy installation and new mounting bracket that keeps the alarm secure over a wide rotation range to allow for perfect alignment.
  • Mounting bracket lock for tamper resistance.
  • Dust cover to keep unit clean during construction.
  • 10-year limited warranty.
All BRK Electronics smoke alarms meet UL 217 standard and are listed with the California State Fire Marshal. They use the new UL mandated repeating 85-decibel alarm horn pattern. 10-year limited warranty. This unit is approved for sale in Oregon after new revisions on law HB2586.--Bree Norlander

What's in the Box
One smoke alarm, one 9-volt battery, and user's manual

From the Manufacturer

The revolutionary BRK 9120 series smoke alarms have been redesigned from the ground up. They install faster, perform better, and are even smarter than before. All of these improvements help reduce nuisance alarms and save time and money. BRK Electronics’ smoke alarms are designed to be easy to install, easy to maintain, and quality-engineered for years of virtually maintenance-free service. The 9120B includes an ionization sensor which helps detect fast flaming fires that consume combustible materials rapidly and is 120-volt AC inter-connectable (with maximum 18 compatible devices), which lets the alarm be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters, and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Power indicators show which unit in the series initiated the alarm and a latching alarm indicator automatically identifies which unit initiated the alarm. This is smart technology to reduce nuisance alarms. It also has a 9-volt battery backup for peace of mind during power malfunction, a single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality, a perfect mount system, including a gasket less base for easy installation and new mounting bracket that keeps the alarm secure over a wide rotation range to allow for perfect alignment, and a mounting bracket lock for tamper resistance. A dust cover keeps the unit clean during construction. It comes with a 10-year limited warranty.

Customer Questions & Answers

Customer Reviews

This product was easy to install and it works very well.
GPP
The other review that says this is a defective product is exactly right.
J. Blanch
Random chirping and multiple false alarms in the middle of the night.
patrick125

Most Helpful Customer Reviews

294 of 302 people found the following review helpful By Michael Epstein on September 5, 2008
Color Name: WhiteSize Name: 5.6" x 5.6" x 2"
Most reviewers report random chirping. In my case, I replaced the battery and couldn't get it to stop chirping every minute, until I found this advice elsewhere on the web:

1. Unplug detector from power (or flip circuit breaker)
2. Remove battery
3. Hold down Test button for 20 seconds
4. Replace battery
5. Turn power/breaker back on

This stopped mine from chirping every minute. Give it a try on yours.
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184 of 190 people found the following review helpful By Me on September 15, 2006
Color Name: WhiteSize Name: 5.6" x 5.6" x 2"
I bought this unit to replace a prior model that was no longer available. It's installed in tandem with other smoke alarms as was its predecessor. It's less than a year old.

Since new, every few random months the unit chirps a random number of times at a random hour of the day - sadly, all but once at dark o'clock, waking up our little tykes. I've replaced backup batteries that test like new on my voltmeter, with new ones that also test positive, to no avail. None of the other units in tandem exhibit a problem. All units, including this one, work as designed when running periodic tests. The unit is neither dirty nor dusty. And I know it works in smokey conditions as my wife occasionally proves by talking on the phone and cooking at the same time.

It's just the kind of thing that makes you want to do something dumb like disable it.
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95 of 97 people found the following review helpful By l0555 on December 17, 2007
Color Name: WhiteSize Name: 5.6" x 5.6" x 2"
I replaced all 9 smoke alarms in my house with the BRK2190B in about 20 minutes. The only reason I did not give it 5 stars is that the old ones were BRK (about 8 years old) that were starting to give false alarms (naturally at 2 or 3 in the morning). I have had them for a couple of weeks with no issues. The old ones did not indicate which unit had failed and was hard to trouble shoot). I had removed four of the 9 in the last year. All 9 of the new ones worked, and I had no issues. Only time will tell if I made the correct choice, but at least the BRK2190B will show me which unit caused the alarm. I have talked with other people with other alarms, and they all seem to have false alarms, so I am hoping the new ones work better. I admit I have not maintained them according to the manufacturer instructions, but who cleans them every month and test them every week.
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72 of 78 people found the following review helpful By Gregory Vandenham on March 16, 2009
Color Name: WhiteSize Name: 5.6" x 5.6" x 2"
I was very happy to notice that some Kidde smoke detectors came with a wiring harness adapter that plugs into your current BRK wiring and retrofits them to the Kidde Adapter.

I actually didn't realize that was possible until I went to Home Depot to check it out. Kidde actually made the swap out a no brainer after reading all the bad reviews associated with BRK.

The detectors I went with were Kidde 120 Volt Front Load Battery Smoke Alarm. I also got their CO/Smoke combo alarm that happened to have Voice Announcements to indicate what the problem was beyond the tone. The CO/Smoke Detector didn't have the adapter but it only took 5 minutes to rewire the connection. Our current building code require a CO detector in the home. Kidde detectors are a little more expensive but they all have hush buttons and tell you which detector went off. Their battery replacement doors are also really nice and warranty is 10 years instead of 5. You'll note the BRK detector says replace by on it and that date is always 5 years from manufacture. So Kidde's maybe twice the cost (at ~$15), but they last twice as long.

I have 3 new detectors in total that are working perfectly so far. The reason for the swap out was that my old BRK detectors went faulty on me - They went off for 5 hours while I was at work. My poor house pets were clearly pissed off / shell shocked when I got home. I was not happy and the only way to silence them was to pull all 3 from the hard wire connection and remove their batteries to reset/silence them.

Thanks to all the other Amazon reviewers for saving me from installing BRK again. Your reviews led me to spend the time I needed to get a better product.
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71 of 78 people found the following review helpful By J. Blanch on December 14, 2007
Color Name: WhiteSize Name: 5.6" x 5.6" x 2"
I am now up at 3:30 a.m. with my husband as we are disabling the 4th one of these that has gone off, chirping about once every minute. They typically all decide to go off in the middle of the night, waking us up. He climbs up on a ladder and tries to vacuum it out. It still chirps. He puts in a new battery, which according to instructions inside the alarm itself, is the reason for the chirping. It still chirps. At this point, you are screaming every expletive that comes to mind that early in the morning. You then take out the battery and unplug it because that is the only way to make it stop beeping. Yes, this means you have a smoke detector that no longer works. The other review that says this is a defective product is exactly right. Save yourself some money and a great deal of frustration and buy another brand. If representatives of the manufacturers read these reviews and do not fix the problem, they will be liable for punitive damages when homeowners who have disabled these smoke detectors die in a fire.
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50 of 56 people found the following review helpful By C. Caldwell on March 30, 2009
Color Name: WhiteSize Name: 5.6" x 5.6" x 2"
I took the advice of another reviewer and replaced all of my existing BRK 910B smoke alarms with Kidde-Hardwire Replacement-Model # i2060 (P/N 21007397) smoke alarms. I purchased these from Home Depot for $15.97 each. These alarms comes with adapters for BRK hardwired smoke alarm, that can be quickly connected to the existing BRK hardwired connector in your ceiling or wall. These alarms needs to be replace every 10 years instead of 5 years and they come with a front battery door with a hush button. We replaced all of ours last week and haven't heard a beep from any of them yet! A great replacement alarm that you can purchase from your local Home Depot or online. Thanks to the 3/16/09 reviewer for this advice.
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