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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.
Actual battery service life depends on the particular design of your smoke or carbon monoxide alarm and the environment in which it is installed. All kinds of alarm batteries specified in the user's manual are acceptable replacement batteries. Regardless of the manufacturer's suggested battery life, you MUST replace the batteries immediately once the unit starts "chirping" (the "low battery warning"). It is recommended that you change the batteries in your alarms when you change your clocks for daylight saving time. Also consider replacing your current alarms with 10-Year Life Alarms that never require a costly battery replacement for the ten year life of the alarm. This 10-Year series is available in smoke, carbon monoxide and combination alarms.
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.
Smoke alarms have a limited life. Although each smoke alarm and all of its parts have passed many stringent tests and are designed to be as reliable as possible, any of these parts could fail over time. Therefore, you must test the devices weekly. The unit should be replaced immediately if it is not operating properly. The performance of smoke alarms older than 10 years is simply not reliable. To ensure your family's safety, all carbon monoxide and smoke/CO combination alarms need to be replaced every 5-7 years. All smoke alarms need to be replaced every 10 years.
If it's time to replace your alarms, consider the NEW 10-Year Life series and never have to worry about a battery replacement for the life of the alarm.10-Year alarms are available in smoke, carbon monoxide and combination alarms.
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Average score based on 120 reviews
- 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!
- Reviewed: 10/02/2021 by Scott R
Review of Order
I've only just received them. Got exactly what I expected at a price that beat ordering from other stores. Time will tell for how they last!
- Reviewed: 09/24/2021 by Kathleen W
Easy to Install!
This model is perfect for easy battery loading and installation. Service on phone order was great and so was price!
- Reviewed: 08/24/2021 by Ronald S
Easy to install.I used the battery powered detectors and their performance is as good as hard wire if you remain diligent about maintaining batteries.In an older home the SA320CN is a great alternative to the hard wire model and installs in minutes.Don't take chances with your property or family and you'll sleep better once you've put these up.Simple to follow directions.I was done in no time.
- Reviewed: 08/20/2021 by Timothy K
Solid Smoke Alarm that detects both kinds of fire issues
Finding a battery operated smoke alarm that detects smoke both via ionization and photoelectric is not easy. This detector does so, and with an advertised smart sensing, and nuisance resistance to minimize falsing alarms. The smoke detector came with all accessories needed to mount the detector, and installation was straightforward. I prefer a brand name like First Alert over some new foreign overseas Chinese companys products for their known track record for piece of mind. Saving a few bucks, or adding some new gizmo feature is no where near as important as having confidence in the quality and accuracy of something as life, and death important as a smoke detector/alarm.
- Reviewed: 08/19/2021 by Jesse V
Smart Fire and Smoke Alarm
Works well and as advertised. Competitively priced and installs easily.