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First Alert 9120AB Hardwired Ionization Smoke Alarm with Alkaline Battery Backup***DISCONTINUED***
First Alert 9120AB Hardwired Ionization Smoke Alarm with Alkaline Battery Backup


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The BRK 9120AB is a great choice when it comes to affordable smoke alarms. Redesigned from the ground up, BRK created the 9120AB model to directly replace past models while providing greatly improved sensing technology, improved installation method, and improved connectivety. All around, the BRK 9120AB is the perfect smoke alarm if you are looking for affordability with function.

The BRK 9120AB uses new Smart Sensing Technology to reduce in nuissance alarms more efficiently and more accurately than ever before. The BRK 9120AB is designed for sleeping rooms in your home, hospitals, hotels, motels, college dormatories and multi-family housing units. Complies with NFPA101, UL217, CSFM, NFPA72, HUD, FHA, and other agencies. Where AC/DC silent smoke alarms are required, this model will work perfectly.

The 9120AB model has the ability to be interconnected within a circuit of alarms and other alert devices such as bells, whistles, repeaters, fans, or switches. (You can connect up to 17 devices, of which 11 can be smoke alarms, and 6 can be alternate devices.) Use must use the RM-4 to link the other alert devices.

Also integrated is a 9V Alkaline battery backup to make sure your smoke alarms do not loose operation when your power fails, providing aditional security.


10-Years Limited Warranty

Model # 9120AB

Weight 7.8 oz

Dimension 5.6" dia x 2.0"H

Operating Voltage 120V AC 60Hz w/ Alkaline battery backup

Operating Current .04 amps (standby/alarm)

Temperature Range 40°F (4°C) to 100°F (38°C)

Humidity Range 10% to 90% relative humidity (RH)

Audio Alarm 85dB at 10 feet

Test/Silence Electronically simulates smoke condition, causing the unit to alarm

Press and hold test/silence button

Alarm Reset Automatic when smoke clears

Interconnections Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms. See user's manual for details.

Smoke Sensor Dual chamber ionization

Indicator Lights/Sounds

AC Power: Constant Green LED

DC Power: Intermittent Red LED

Local Alarm: Red LED flashes rapidly

Remote Alarm: Red LED out.

Latching Alarm: Green LED flashes 2 sec. on/2 sec. off after local alarm

Listing Listed to UL217 Standard

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Great Service and Price November 14, 2016
Reviewer: Lawrence Lalka from Phenix City Alabama  
I have used Smoke Alert in the past and like then prices were very competitive with Great Service and currently dated alarms

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