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The First Alert Hardwired Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup is designed to provide peace of mind. The photoelectric and ionization sensors on this fire detector alert you to both smoldering and fast-flaming fires, offering comprehensive detection and early warning. The 85-decibel fire alarm can connect to other compatible hardwired detectors for larger spaces.
Dual Sensors Detect Two Kinds of Fire
The First Alert Dual Sensor Smoke Alarm features photoelectric and ionization sensors for increased detection. The photoelectric sensor detects smoldering fires from objects like cigarettes burning on furniture or in trash cans, while the ionization sensor detects fast-flaming fires like erupting kitchen grease fires or combustibles. The dual sensors on this fire detector provide you and your family with the earliest warning possible.
Designed for Fewer False Alarms
Smoke from cooking or even shower steam can sometimes set off a smoke alarm. The photoelectric sensor on the First Alert Dual Sensor Smoke Alarm is sensitive to smoldering fires while reducing false alarms. The photoelectric sensor is smart enough to distinguish real threats from everyday activities, resulting in fewer annoying false alarms.
Battery Backup for Detection in a Power Outage
The fire detector is hardwired, but it also features a battery backup to help ensure the smoke alarm can still function in the event of a power outage. The unit requires two AA batteries, and comes with a low-power indicator to alert you when they need to be replaced. A one-touch silence/test button makes it easy to test the detector monthly or silence it during a false alarm.
Optipath 360°and Interconnectivity for Larger Spaces
The First Alert Dual Sensor Smoke Alarm easily connects to other compatible hardwired alarms, making it the perfect solution for larger buildings such as institutions, dormitories, hotels and other multi-family dwellings that use single station smoke detectors. The smoke and fire detector includes patented Optipath 360° technology that provides 360° of access to the alarm, and its 85-decibel siren is designed to be loud enough to awaken even the soundest of sleepers.
First Alert Smoke Alarm 3120B
Ionization smoke alarms are designed to identify fires that are defined by their rapid flaming qualities. These fires are characterized by their ability to generate and combust at an advanced speed (ie. kitchen grease fires or fires fueled by paper burning in a wastebasket).
Photoelectric smoke alarms specialize in detecting fires that are indicative of their slow smoldering properties. These fires are defined by their propensity to produce large smoke particles that can smolder for hours before bursting into larger flames (ie. those caused by cigarettes or candles burning on couches or bedding).
For maximum protection and full coverage from all types of fires, your best option is to use a smoke alarm that features both photoelectric and ionization sensing technologies.
Average Rating Based on 23 reviews: (5)
Good Product - 01/26/2019
Reviewer: Joseph Cudzynowski
Worked well during a recent furnace meltdown.
wired in dual smoke alarm - 12/03/2018
Reviewer: Anne L Haun Rymski
Son-in-law had no difficulty with installation. No false alarms which was major problem with original from another company to point it had to be disconnected.
First Alert Great products - 09/20/2018
Reviewer: Michael Wentink
I have just recently replaced all my smoke detectors throughout our 10 room B&B. I bought all First Alert units and particularly like the 2 AA battery design rather than the 9 volt. The batteries are much cheaper. I also later bought three wireless for each floor to improve fire alter status.
Reviewer: Bonnie Scherer
Item received in good shape. Easy to install. Good instructions. Product works great.
Easy to use - 05/23/2018
Reviewer: Laura Pope
Keeps us safe
First alert fire alarm - 01/01/2018
Reviewer: Danilo Cable
Good product, easy to install. Look nice design.
Reviewer: Erika Cordero
I needed a replacement for a discontinued Tek electronics model IL_930 Ionization smoke detector and this was perfect. Followed the directions and was easy to install plus it looks good. One very satisfied customer!
Easy install. Works great. - 07/31/2017
Reviewer: Richard Hunter
Replaced builder grade of competitive brand that was 10+ years old. Good to now have both smoke sensing technologies. Detector comes with batteries, mounting plates, paint cover and wiring pigtail. Remove old detector, wire new pigtail and base plate and plug it in.
Reviewer: Asa Crane
I am replacing cheap and the installation was simple to carry over. No false alarms, which was problem with cheap.
Smoke Detector - 01/26/2017
Reviewer: Paul Silverman
Easy to install and looks good. Works well with first alert co/smoke detectors already in the house.
Other reasons include: It could be a different device or appliance such as a security system, monitor, carbon monoxide alarm, or other device which has a similar low battery or alert signal. Some of the same factors that cause unwanted alarms can cause intermittent alarms: dust and insects in the alarm or power interruptions in hardwired alarms. Improper wiring on AC or AC/DC smoke alarms. AC alarms will chirp every 5 seconds if the interconnect wire is grounded. The orange interconnect wire should NEVER be grounded; it should only be used to interconnect other smoke alarms or compatible devices.
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