10 Best First Alert Sc9120b Replacement of 2025

Main Highlights

• 
  Superior carbon monoxide sensor and dual ionization smoke alarm
• 
  Inter-connectable with BRK and First Alert hardwired smoke and carbon monoxide alarms
• 
  Easy to install universal mount bracket
• 
  Simple to use silence/test button; separate smoke and CO latching alarm indicators
• 
  9-volt battery included; 10-year limited warranty
• 
  Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

Main Highlights

• 
  Keep your family safe with this 3-pack of hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure
• 
  Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire
• 
  Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85-decibel siren provides a clear, loud warning upon detection
• 
  Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected
• 
  Simple to use, with a single test/silence button, and side-load battery compartment; Tamper-resistant locking brackets and universal mounting brackets make installation easy. Dust cover

Main Highlights

• 
  First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.
• 
  Through early warning interconnect, when one alarm sounds, all compatible alarms will sound
• 
  Battery backup provides continuous protection during power outages
• 
  Alarm indicator visually identifies the unit that initiated the alarm
• 
  Quick Connect Plug included allows for easy installation with no need to rewire

Main Highlights

• 
  Imported
• 
  Tamper resistant locking pins, single button silence test and loud 85dB alarm
• 
  120-Volt AC power with 9-Volt battery backup (included) to keep alarm functioning during power outage

Main Highlights

• 
  Convenient adapter plugs makes it easy to replace existing hardwired alarms without needing to rewire
• 
  Keep your family safe with this hardwired First Alert smoke and carbon monoxide alarm with a 10-year battery backup, which means constant monitoring for the life of the alarm, even if there's a power failure
• 
  Combination smoke alarm and carbon monoxide detector features electrochemical carbon monoxide sensing technology, as well as intelligent smoke sensing technology to reduce nuisance alarms
• 
  Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85-decibel siren provides a clear, loud warning upon detection
• 
  Simple to use, with a single test/silence button; includes 10-year lithium battery with a locked drawer to prevent tampering
• 
  10-year limited warranty; equipped with end-of-life signal, so you know when it's time to replace the unit for your safety
• 
  Rigorously tested to meet UL standards
• 
  To ensure complete protection make sure to place one carbon monoxide detector on each level of your home and in each bedroom

Main Highlights

• 
  Imported
• 
  Tamper resistant locking pins, single button silence test and loud 85dB alarm
• 
  120-Volt AC power with 9-Volt battery backup (included) to keep alarm functioning during power outage

Main Highlights

• 
  Note: A loose neutral (white wire) connection within the home junction box could prompt a device malfunction
• 
  Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm
• 
  To ensure complete protection make sure to place one on each level of your home and in each bedroom
• 
  Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected
• 
  Simple to use, with a single test/silence button, and side load battery compartment; Tamper resistant locking brackets and universal mounting brackets make installation easy
• 
  Rigorously tested to meet UL standards. Emits T3 pattern
• 
  Keep your family safe with this 6 pack of hardwired smoke alarms; the battery backup means constant monitoring, even if there's a power failure
• 
  Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. easy-to-access battery drawer that allows you to replace the battery without dismounting the alarm
• 
  First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

Main Highlights

Main Highlights

Main Highlights