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Model # 9120B6CP

Internet # 203524007

120-Volt Hardwire Ionization Sensor Smoke Alarm with Battery Backup (6-Pack)

This item has been discontinued.
The Home Depot no longer carries this specific product.

$63.60 /each




Model # 9120B6CP

Internet # 203524007

BRK’s Hardwire Ionization Sensor Smoke Alarm detects flaming fires and runs on a battery backup when your power is out. This alarm will sound if it detects smoke even during power outages. It is made for hardwire installation and uses a 9-Volt backup battery. The ionization sensor detects fast flaming fires that consume combustible materials. Other features include a test and silence button, a latching indicator that remembers which unit initiated the alarm and smart technology that helps reduce false alarms. The 9120B can be connected to (18) devices including, (12) compatible smoke alarms and (6) compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. The 9120B features a perfect mount system with a gasket-less base for easy installation, a new mounting bracket that keeps the alarm secure over a wide rotation range for perfect alignment and a mounting bracket lock for tamper resistance. A dust cover keeps the unit clean during construction. Engineered for residential and institutional use, this detector is perfect for dormitories and multi-family dwellings. BRK’s Hardwire Ionization Sensor Smoke Alarm is warranted to the original purchaser for a period of 10-years. First Alert invests time and research into providing dependable and hardworking products. Committed to innovation and value, First Alert improves safety in and around the house.

  • Detects flaming fires and runs on a 12-Volt battery backup during outages
  • Can connect to (12) smoke alarms and (6) devices like bells, horns and more
  • Perfect mount system with gasket-less base for easy installation
  • Features a test button, latching indicator and smart technology that helps reduce false alarms
  • Rated for 120-Volt, 60 Hz and has a standard white finish
  • Measures 5.59 in. by 5.69 in. by 5.69 in. and weighs 0.6 lbs.
  • Comes in a contractor’s 6-pack
  • Includes batteries
  • 10-year limited warranty

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
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Alarm/Detector Features 
Battery Back-Up 
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Commercial / Residential 
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Warranty / Certifications
Certifications and Listings 
No Certifications or Listings 


Rated 4.8 out of 5 by 10 reviewers.
Rated 5.0 out of 5.0 by Smoke Alarm Installation Easy install if you have the same three pin connection by BRK - First Alert. Who knew that Smoke Alarms have a 10 year life before needing to be replaced. Buying the six pack is by far the best price for any smoke alarm. July 28, 2015
Rated 5.0 out of 5.0 by Easy replacement alarm Had to replace 10 BRK alarms at once as they had hit their 10 year mark and we had a home inspection in advance of a sale. Trying to replace our original BRK alarms with Kidde alarms was both time-consuming and expensive due to extra connection parts needed as well as different harnesses. These alarms provided the easiest installation with existing BRK harnesses. Nice that they include batteries too and a great value as a six-pack vs. in-store individual units. July 15, 2014
Rated 5.0 out of 5.0 by The Perfect Replacement Product This was a replacement for the smoke detectors that came with my home purchase in 1999. I was able to to find the correct part on the web site very easily. Received the product very promptly, and installation was very easy with a simple screw driver which I appreciated since a couple of the detectors were up near the top of 12 foot ceilings. Very Satisfied! July 15, 2014
Rated 5.0 out of 5.0 by Easy Install I purchased these to replace our 10 year old smoke detectors. I replaced 5 in all and it took me less than 45 minutes. The electric connectors were included in the package, but I was able to plug in the new detectors into the old connections. I only had to replace the base plate for each detector. Super Easy. I also was pleased to see that batteries were included! March 25, 2014
Rated 5.0 out of 5.0 by smoke detectors replaced old ones. easy to do. even came with batteries June 11, 2014
Rated 4.0 out of 5.0 by As advertised Inexpensive plug and play replacement for my old BRK hard wired units. Easy to install. Came up as expected. Reasonable quality. July 22, 2014
Rated 4.0 out of 5.0 by Good price and ten year guarantee. Securing method poor. Good price and ten year guarantee. Would have been better to include plastic screw anchors and metal screws to attach the detector base to the wall rather than the short plastic "hammer-in" retainers that provide a tenuous hold in drywall. May 6, 2014
Rated 5.0 out of 5.0 by Very easy to install Purchased and received two weeks ago. It was very easy to replace my existing and outdated BRK detectors with this new one. The six-pack was a great unit savings, so i replaced all my old detectors. April 21, 2014
  • 2015-10-02T13:43:54.324-05:00
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