Model # 9120B

Internet #100065881

BRK Hardwired Interconnected Smoke Alarm with Battery Backup
0029054513014

BRK

Hardwired Interconnected Smoke Alarm with Battery Backup

  • Ionization smoke sensor
  • Tamper resistant locking pins
  • Hardwired with battery backup
$1221 /each
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Product Overview

  • Ionization smoke sensor
  • Tamper resistant locking pins
  • Hardwired with battery backup
The BRK 9120B 120-Volt AC Smoke Alarm with Battery Backup is designed to install faster, perform better, and be even smarter than before. This alarm 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 to network a comprehensive system for your home. If one unit triggers an alarm, all smoke alarms in the series will sound. The 9120B includes an ionization sensor which helps detect fast flaming fires that consume combustible materials rapidly. The dust-reducing packaging helps avoid accidental alarms due to contaminants and the 85 dB horn can be inspected with a test button. This unit includes a quick-connect wiring harness for easier installation to your household current and 9-Volt battery backup ensures protection even during power outages or service interruptions. 10-year limited warranty.
  • 120V AC smoke alarm with battery backup
  • 85 dB horn sounds as smoke reaches dangerous levels
  • Can be interconnected with 12 additional BRK and First Alert smoke alarms and 6 compatible devices such as heat alarms for a complete safety system
  • Dust-blocking covers to reduce nuisance alarms associated with particulate contamination
  • Locking pins deter removal
  • A single button tests units functionality and silences nuisance alarms
  • 9-Volt battery backup ensures operation during household current interruption
  • Power indicator lets you see at a glance that the alarm is powered
  • Universal mounting bracket with wide opening for easy wire access
  • Meets UL standards

Product Overview

The BRK 9120B 120-Volt AC Smoke Alarm with Battery Backup is designed to install faster, perform better, and be even smarter than before. This alarm 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 to network a comprehensive system for your home. If one unit triggers an alarm, all smoke alarms in the series will sound. The 9120B includes an ionization sensor which helps detect fast flaming fires that consume combustible materials rapidly. The dust-reducing packaging helps avoid accidental alarms due to contaminants and the 85 dB horn can be inspected with a test button. This unit includes a quick-connect wiring harness for easier installation to your household current and 9-Volt battery backup ensures protection even during power outages or service interruptions. 10-year limited warranty.

  • 120V AC smoke alarm with battery backup
  • 85 dB horn sounds as smoke reaches dangerous levels
  • Can be interconnected with 12 additional BRK and First Alert smoke alarms and 6 compatible devices such as heat alarms for a complete safety system
  • Dust-blocking covers to reduce nuisance alarms associated with particulate contamination
  • Locking pins deter removal
  • A single button tests units functionality and silences nuisance alarms
  • 9-Volt battery backup ensures operation during household current interruption
  • Power indicator lets you see at a glance that the alarm is powered
  • Universal mounting bracket with wide opening for easy wire access
  • Meets UL standards

Info & Guides

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Price
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Name Hardwired Interconnected Smoke Alarm with Battery Backup FireX Hardwired 120-Volt Inter-Connectable Smoke Alarm with Battery Backup Hardwired 120-Volt Inter-Connectable Smoke Alarm With Battery Backup Includes Universal Adapters Hardwired Interconnected Smoke Alarm with Battery Backup
Brand BRK Kidde Kidde First Alert
Ratings (214) (379) (380) (49)
Power Source Hardwired Hardwired Hardwired Hardwired
Alarm Sensor Type Ionization Ionization Ionization Photoelectric
Alarm/Detector Features No Additional Features Battery Back-Up,Hush Feature,Interconnected Battery Back-Up,Hush Feature,Interconnected Battery Back-Up
View Product View Product View Product View Product

Specifications

Dimensions

Product Depth (in.)
2
Product Height (in.)
5.63
Product Width (in.)
5.5

Details

Alarm Sensor Type
Ionization
Alarm Type
Smoke
Alarm/Detector Features
No Additional Features
Commercial / Residential
Commercial / Residential
Connector/Contact Type
2-Wire
Included
Batteries
Pack Size
1
Power Source
Hardwired
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Certifications and Listings
1-UL Listed

Specifications

Dimensions

Product Depth (in.)
2
Product Height (in.)
5.63
Product Width (in.)
5.5

Details

Alarm Sensor Type
Ionization
Alarm Type
Smoke
Alarm/Detector Features
No Additional Features
Commercial / Residential
Commercial / Residential
Connector/Contact Type
2-Wire
Included
Batteries
Pack Size
1
Power Source
Hardwired
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Certifications and Listings
1-UL Listed

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Questions & Answers

I need a replacement for BRK 4120B

I need to replace a BRK Model No. 4120B, What new Model number do I need to replace it with?
Asked by: r2mays
BRK Electronics says that model 9120B is the replacement for the discontinued 4120B.
Answered by: Rick
Date published: 2017-08-30

can I buy without battery back up

the ceilings are very high, we have a generator back u, we don't want battery back up can I still get smokes without battery backup?
Asked by: bob
According to the manual that comes with the 9120 series, the "Model 9120 with Silence" does not have a battery backup. The "Model 9120B with Battery Back-up and Silence" does.
Answered by: Ned
Date published: 2017-08-31

Does this smoke alarm have a camera in it?

Asked by: Bigo
No!
Answered by: Nate
Date published: 2017-08-30

How to clean?

Cleaning
Asked by: Brk
The instructions say to dust them once a month and to never use any water or liquid cleaner on them.
Answered by: Nate
Date published: 2017-08-30
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Customer Reviews

Hardwired Interconnected Smoke Alarm with Battery Backup is rated 4.5 out of 5 by 213.
Rated 5 out of 5 by from We had an off duty fireman in our house to clean our dryer vent. He asked how old our smoke dete... We had an off duty fireman in our house to clean our dryer vent. He asked how old our smoke detectors were. They were original to the house. Model BRK 4120B. The 9120B uses the same plug. It was easy to install. The paperwork recommends shutting off power to the circuit your unit is attached to. I didn't do that. The old trim ring is held on by 2 screws. Just back them off enough to get the old trim ring removed. It takes a little work to get the screws to line up, but once you do, tighten the trim ring to the ceiling, pull the plastic battery protector out, plug the unit into the ceiling, and screw on to the mounting. Five minute job. Thank you First Alert for making it easy!
Date published: 2017-05-06
Rated 5 out of 5 by from These fire alarms worked out perfectly. I bought them... These fire alarms worked out perfectly. I bought them to replace the ones in my house that were 12 years old. It used the same mounting base so all I had to do was twist off the old one, disconnect the cable, and connect the new one. I don't get any false alarms and nobody will know if they fail and I die in a house fire. But hey, I lived with the same model for 12 years. Very cost effective and super easy to install.
Date published: 2017-09-05
Rated 2 out of 5 by from These units were already installed in my house so I... These units were already installed in my house so I pretty much stay with them by default. I find that I have to completely replace these things about every year and a half or so. They are typical consumer products these days (AKA disposables). Easy to swap out and toss the old ones in the trash.
Date published: 2017-08-22
Rated 5 out of 5 by from Great detector which is the industry standard. Accepts the +9V... Great detector which is the industry standard. Accepts the +9V signal on the interconnect wire. I designed a custom circuit to add heat detectors which I placed in my attic which would signal an alert from this smoke detector. By using the Roost WiFi battery, I will get alerts on my phone.
Date published: 2017-09-05
Rated 5 out of 5 by from This was a replacement for the 9 smoke detectors in... This was a replacement for the 9 smoke detectors in our house. after 16 years, they started to malfunction and I discovered that everyone should be replacing smoke detectors, not just the batteries. This is an excellent model to replace an existing smoke detector with. Easy to install.
Date published: 2017-08-22
Rated 5 out of 5 by from I needed to replace my smoke detectors as they were 10 years old and one of them started going of... I needed to replace my smoke detectors as they were 10 years old and one of them started going off for no reason, so why not? These were the exact ones I had and the price was right. I just mounted them to the existing bracket. Had them shipped to store for free. Quick pick up
Date published: 2017-08-12
Rated 4 out of 5 by from The above named alarms were pre-installed in our house when... The above named alarms were pre-installed in our house when we purchased it 17 years ago. They have performed adequately most of the time. However, a few times they "went off" for no apparent reason. But for the most part we are satisfied with them. We have four of them in our home.
Date published: 2017-07-25
Rated 4 out of 5 by from I was disappointed that the mounts weren't exactly the same as the ones replaced so I could simpl... I was disappointed that the mounts weren't exactly the same as the ones replaced so I could simply insert the new modules. However, the screw lineups were the same so the installation wasn't difficult. The units appear to work well.
Date published: 2017-08-22
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