First Alert Dual Sensor Photoelectric/Ionization Smoke and Fire Alarm with 10-Year Sealed Battery - SA3210 (1039842)

  • First Alert Dual Sensor Photoelectric/Ionization Smoke and Fire Alarm with 10-Year Sealed Battery - SA3210 (1039842)
  • First Alert Dual Sensor Photoelectric/Ionization Smoke and Fire Alarm with 10-Year Sealed Battery - SA3210 (1039842)
  • First Alert Dual Sensor Photoelectric/Ionization Smoke and Fire Alarm with 10-Year Sealed Battery - SA3210 (1039842)
  • First Alert Dual Sensor Photoelectric/Ionization Smoke and Fire Alarm with 10-Year Sealed Battery - SA3210 (1039842)
  • First Alert Dual Sensor Photoelectric/Ionization Smoke and Fire Alarm with 10-Year Sealed Battery - SA3210 (1039842)
Dual Sensing 10 Year Battery Operated Smoke Detector
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Dual Sensor Smoke and Fire Alarm with 10-Year Sealed Battery

The First Alert SA3210 10-Year Battery Dual Sensor 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 built-in 10-year lithium-ion battery provides continuous power, with no need to ever worry about changing the battery over the lifetime of the smoke detector, and it can be easily installed anywhere without wires.

Dual Sensors Detect Different Types of Fires

This 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, while the photoelectric sensor detects smoldering fires, such as when a lit cigarette ignites clothing or upholstery. Both sensors work together to provide complete smoke and fire detection.

Intelligent Sensing Technology 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.

Ten Years of Smoke and Fire Protection

This smoke and fire alarm is powered by ten year sealed lithium batteries. The batteries will not have to be replaced during the span of the alarm's ten year operation. Dual sensing technology and a decade's worth of protection provides an elite defense in alerting others to the presence of smoke and fire in the home.

First Alert Photoelectric/Ionization Smoke and Fire Alarm SA3210

* Meets California, New York and New Jersey 10 Year Smoke Alarm Requirements

Dual Sensor Smoke and Fire Alarm with 10-Year Sealed Battery Features:

  • Utilizes both ionization and photoelectric smoke sensors for optimal performance.
  • Intelligent sensing technology reduces non-emergency or nuisance alarms.
  • Powered by sealed, ten year lithium batteries to provide continuous protection for ten years without battery replacement.
  • Emits a loud 85 dB alarm for ample warning.
  • Meets UL217 standards and complies with legislative requirements for 10-year battery operated smoke alarms.
  • Product Dimensions (LxWxH): 5 x 2 x 5 in.
  • Product Weight: 0.54 lbs.
Product Specs

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.

Write A Customer Review Review


Average score based on 42 reviews

Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5

Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5

Reviewed: 04/13/2020 by Todd Whitford

Purchased 6 detectors. 5 of 6 installed seamlessly, but the 6th was defective DOA. Fortunately, First Alert sent a replacement quickly so all 6 are now installed and working as expected.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5First Experience

Reviewed: 04/01/2020 by Irvin Yoshino

I've been trying to purchase a dual sensor smoke detector with a lithium battery. I bought a First Alert Ionization sensor alarm from Costco, it started to chirp false alarms after one year. So far so good, it's only been two months .

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5A Must Buy Item

Reviewed: 02/26/2020 by Luvfirstalert

I purchased this unit because it has the sealed 10 year battery, and can detect flames as well as smoke. This is a must buy for peace of mind and ease of maintenance.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Happy Customer

Reviewed: 02/17/2020 by Nancy Priddy

I ordered 6 of these alarms to update the safety of my home. When they arrived in just a couple days, I was quite impressed! Aside from endangering my life on a stepladder, installation was a breeze. The hardest part was lugging the step ladder around. And figuring out some of the instructions about alignment, which could have been written a little better. But common sense prevailed. I got the job done. I'm a happy customer.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Has met all expectations

Reviewed: 12/16/2019 by Alan Aqualino

Bought this model to replace 10yr old models which lacked sealed battery. When recd, determined that all the ones I'd purchased tested okay. For me, this models universal mounts indeed worked fine with pre-existing screw holes from multiple vendors/models. Although my old models sometimes gave false positives for bath mist & kitchen fumes, these new models have so far been very well-behaved. Have not yet fired up the woodstove for winter... Hope the sealed battery indeed lasts 10 yrs!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Exactly the detector I was looking for

Reviewed: 12/06/2019 by Keith Buis

I was looking for duel senor with 10 yr battery and this product is what I was Looking for.

Rating: 2/5Rating: 2/5Rating: 2/5Rating: 2/5Rating: 2/5Only 2 out of 3 worked properly

Reviewed: 11/18/2019 by Christopher Ryan

This was the only dual-sensing, 10-year smoke alarm I could find. I ordered three. Two are working properly. One malfunctioned right out of the box, with beeps and LED flashes signalling malfunction. I had to de-activate it and send it back. To their credit, the company responded promptly and graciously to my request for a new one, and the covered shipping to send the old one back.

Customer Service Response:

We apologize for the inconvenience. We're glad we were able to assist you in resolving this matter quickly.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5SA3210 Excellent Product if you want a battery only unit

Reviewed: 11/15/2019 by James J

This product is good if you want dual sensor in a 10 year battery only unit. Please note this unit cannot be connected to other alarms in a chain as there is not a hardwire option.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5

Reviewed: 10/14/2019 by Mohammad Alhammadi

One of the top and best Choice in the market. So proud and happy

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/510 year battery dual sensor smoke & fire alarmke & fire alarm

Reviewed: 10/06/2019 by John Rajczi

Again, ordered on 26July,2019, but just installed today 6 Oct.. Went very well. Was pleasantly surprised when I found out I could use the anchors from the old Kidde dual smoke alarms. I originally purchased the First Alert ones because I wanted a dual sensor smoke alarm with a 10 year battery which Kidde did not have. Thank you First Alert for selling one. I appreciate your thoughtfulness in this matter. Again thank you very much.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Perfect Replacement

Reviewed: 07/24/2019 by Edwin Fillman

I purchased this unit to replace an older model that reached its maturity date. This one has a 10 year battery so I don't have to hassle with changing batteries. So far so good. Looks like a winner!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Safety Plus

Reviewed: 04/01/2019 by Thomas Karpick

We couldn't be happier that we now have dual sensor protection against fire in our home. We can sleep easier now.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Dual sensor and 10 year battery

Reviewed: 02/18/2019 by Tom S

In California, the law requires 10 year batteries on non-wired detectors, and this is one of the few with dual sensors photoelectric and ionization - you need both types of detectors, why not have both in the same unit. Customer service is very friendly and helpful, plus shipping was included. What more can you ask for?

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Easy install

Reviewed: 02/17/2019 by Dale Mitchell

The alarm came as scheduled. It was quick and easy to install and when tested sounded the alarm. No information yet on its sensitivity since it's only be up a short time.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/510 Year & Dual wise.

Reviewed: 01/07/2019 by Van Sikes

Best protection for fire or smoke with benefit of 10 year life.

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