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BRK 3120B - Smoke Alarm
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BRK 3120B - Smoke Alarm

Dual Photoelectric and Ionization - Detects Flaming and Smoldering Fires - 120V Wire-in with Battery Backup


The BRK 3120B dual photoelectric and ionization smoke alarm is a wire-in, 120VAC 60Hz single and/or multiple station sensor alarm designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories, and other multifamily dwellings as defined in standard NFPA 101. This alarm features a battery backup with 2 AA batteries to keep you protected even during power outages. Listed to UL 217 standards, this alarm features a primary ionization sensor for fast, flaming fires and a secondary sensor for smoldering fires, making this alarm the ideal choice for home or commercial protection.


Stock Code:  BRK-3120B
Part No.:  3120B
Battery Backup:  Yes
Depth:  2 in.
Finish:  White
Secondary Sensor:  Photoelectric Sensor for Smoldering Fires
UL Listed:  UL 217
Case Quantity:  12
Brand:  BRK
Voltage:  120
Battery Type:  (2) AA Batteries
Diameter:  5 in.
Sensor Type:  Ionization Sensor for Fast Flaming Fires
Weight:  0.593 lbs.
Warranty:  10 Years

Customer Reviews

Rated 5 out of 5 by 3 reviewers.
Rated 5 out of 5 by Great product. Super great transaction. Much improved over prior models. No false alarms. Overall purchase and transaction was smooth and easy. April 11, 2012
Rated 5 out of 5 by Much improved over BRK 7010B The 3120B is a huge improvement over previous BRK models. We had 10 linked BRK 7010B detectors that were just awful: many spurious alarms, silence buttons didn't work, can't tell which unit alarmed for 20 seconds at 2am then went silent, battery replacement warnings even though the units were AC powered. Our house has more than a hundred feet of alarm wiring due to modular construction, and that may be more than the 7010B electronics could deal with. We've replaced the important ones with 3120B units, and they're much better. No false alarms in a month, and the testing and silence and latching features work as documented. If the batteries stay good for more than 3 years (we never have power outages) then the 3120B will be a perfect unit. Highly recommended. October 6, 2011
Rated 5 out of 5 by Double protection--ion/photon important This is only company selling BRK/First Alert's new ion/photon smoke detector. The double protection is strongly recommended by most fire departments. June 30, 2011
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