Posts Tagged ‘9120B’

Smoke Alarm Battery Life

Thursday, December 10th, 2009
For instance, a carbon zinc battery in a BRk 9120B will last up to one year. It all depends on how fresh it was before it was installed and when the unit itself was activated. UL 217 mandates that any installed battery in a backup mode only alarm needs to last at least for 24 hours in standby condition and thereafter be able to be in alarm for at least 4 minutes. As a rule of thumb in a smoke alarm, alkaline batteries will last for about 1-2 years and Lithium batteries for 6 years plus

As a rule of thumb in a smoke alarm, alkaline batteries will last for about 1-2 years and Lithium batteries for 6 years plus

For instance, a carbon zinc battery in a BRk 9120B will last up to one year. It all depends on how fresh it was before it was installed and when the unit itself was activated. UL 217 mandates that any installed battery in a backup mode only alarm needs to last at least for 24 hours in standby condition and thereafter be able to be in alarm for at least 4 minutes. As a rule of thumb in a smoke alarm, alkaline batteries will last for about 1-2 years and Lithium batteries for 6 years plus.

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Posted in Smoke Alarm Laws, Smoke Alarm Safety Tips | 1 Comment »

Product Review: BRK 9120B 120V Hardwired, Smoke Alarm with Battery Back-up

Friday, September 11th, 2009
The 9120B Replaces 4120b, 4120sb and 86RAC

The 9120B Replaces 4120b, 4120sb and 86RAC

Designed for the fastest possible installation! If AC power fails, the battery back-up keeps the smoke alarm working. Can be interconnected with up to 11 additional smoke alarms and 6 compatible devices like bells, repeaters or switches. Replaces discontinued models 4120b, 4120sb and 86RAC.

Features:
- Ionization Sensor
- Quick Plug-In Power Connector
- 120 VAC; Interconnectable
- Alarm Indication
- Battery Drawer Lock
- Mounting Bracket Lock
- Swing-Open Battery Door
- Battery Activation Tab
- Battery Back-Up
- AC Power Indicator
- Low Battery Warning “Chirp”
- Missing Battery Tab
- Easy Install Mounting Bracket
- 9V Battery Included

Technical Specifications:
- 120V AC
- Alarm Dimensions: 5.6” dia x 2.0”H
- Weight: 7.8 oz (9120B)
- Operating Voltage: 120V AC 60Hz w/ 9V battery backup
- Operating Current: .04 amps (standby/alarm)
- Temperature Range: 40 Degree F (4 Degree C) to 100 Degree F (38 Degree C)
- Humidity Range: 10 percent to 90 percent relative humidity (RH)
- Audio Alarm: 85dB at 10 feet

Warranty: 10 year – manufacturer

Additional Information:
Manufacturer Specification Sheet (PDF File)
Manufacturer User Manual (PDF File)

Compare prices and buy this alarm!

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Posted in Helpful Information, New Smoke Alarms, Smoke Alarm Reviews | 2 Comments »