- About The Store
- Home Safety FAQs
View Cart 0
To be notified when this item is back In Stock, please enter your Email Address below:
You Save: $11.00 (28% Off)
The First Alert SA320CN Dual-Sensor Smoke and Fire Alarm provides early warning of both flaming and smoldering fires. Additionally, its intelligent sensing technology is designed to cut down on nuisance alarms from cooking smoke or other common false-alarm triggers. A single button both silences and tests the smoke detector for simple operation. The battery-powered fire detector can be easily installed anywhere without wires.
Dual Sensors Detect Different Types of Fires
The First Alert Smoke and Fire Alarm comes equipped with two different sensors to offer the earliest possible warning of a fire. The ionization sensor detects flaming fires, such as grease fires or wastebasket fires, and the photoelectric sensor detects smoldering fires, such as when a lit cigarette ignites clothing or upholstery. Both sensors work together to provide comprehensive smoke and fire detection.
Smart Sensor Minimizes False Alarms
People sometimes disable a fire detector when it goes off due to cooking smoke or steam, even though in doing so they endanger themselves and their loved ones. Intelligent sensing technology in the First Alert Dual-Sensor Smoke and Fire Alarm is designed to distinguish between real fires and nuisances, reducing false alarms significantly so there is never a need to disable the alarm.
Battery-Powered Fire Detector Installs Anywhere
The battery-powered fire detector can be installed anywhere with no wires or electrician required. A low-battery indicator light and audible chirp let you know it is time to change batteries. The battery compartment opens without the need to remove the alarm from the mounting bracket, making battery replacements quick and easy.
First Alert Smart Sensing Smoke Alarm SA320CN
* California and New York Residents - Please note this alarm is not compliant with your state's 10 Year Sealed Battery Alarm Legislation Requirements.
Ionization smoke alarms are designed to quickly identify fast flaming fires. These fires can be categorized by their ability to generate and combust at an advanced speed (i.e. kitchen grease fires or fires fueled by paper burning in a wastebasket).
Photoelectric smoke alarms specialize in detecting slow smoldering fires. These fires can be categorized by their propensity to produce large smoke particles that can smolder for hours before bursting into larger flames (i.e. fires caused by cigarettes or candles burning on couches or bedding).
For maximum protection and full coverage from both types of fires, First Alert Dual Sensing Smoke Alarms offer elite protection with their photoelectric and ionization sensing capabilities.
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.
We make it as easy as possible to ensure you get the lowest prices available:
Average score based on 125 reviews
- Reviewed: 10/02/2022 by David S
First Alert Smoke Alarm - SA320CN
Very quick shipment and quality. Reliable!!!
- Reviewed: 09/15/2022 by Jim T
Not much you can say about a smoke detector. I hope I never know how well it works! This is my second one of this model, and I've been very pleased with both.
- Reviewed: 07/28/2022 by JESSE F
First Alert with Smart Sensing Technology
This was my second purchase of the same alarm. I like the Smart Technology of this alarm, also very easy to install.
- Reviewed: 07/20/2022 by Parent
Nice choice for young adults
The Nuisance Resistance Feature is a nice feature. I am hoping it increases compliance with use. Practical gift for young adults living on their own
- Reviewed: 07/13/2022 by JESSE F
First Alert with Smart Sensing Technology
I replaced a older alarm with this one because of the good reviews and the known technology. Very easy to install using the screws that were used for old alarm.
- Reviewed: 05/16/2022 by Sharon B
I am thrilled with the two new detectors. Easy to install, batteries included, attractive. Would definitely purchase again.
- Reviewed: 03/08/2022 by Frank D
The First Alert SA 420 smoke alarm was delivered a&ead of schedule, works as it should. It replacesa a previous unit which continued to emit a low- battey warning signal after expiration of warrabty..
- Reviewed: 03/01/2022 by Sarah R
easy to install
my old alarms were very outdated and i wasn't sure they were dependable. first alert shipped quickly and the alarms were easy to install and they take 2 AA batteries
- Reviewed: 01/31/2022 by Barbara P
Recently ordered from first alert. After reading reviews on smoke detectors I selected these. The website was easy to navigate, the price was the best I could find, shipping was free and the product arrived quickly. What more could you ask for?
- Reviewed: 01/05/2022 by David S
We switched out our old brand for First Alert and it made a noticeable difference. Alarm alerts at the first sign of smoke. So much peace of mind now!