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FIRST ALERT Dual Sensor Smoke and Fire Alarm, SA3210 , White

  • Based on 25,090 reviews
Condition: Used - Like New
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Size: 1-Pack


Style: Standard Detection


Pattern Name: SA3210FF


Features

  • The front cover design of the alarm may vary but product function remains the same
  • Complies with all current 10 year legislation in U.S. states cities where required
  • The 10 year lithium ion battery offers continuous power for the life of the alarm and provides continued monitoring even if there's a power failure
  • Loud 85 decibel siren sounds to alert you to danger, Hardwired alarm includes battery backup for power outages
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • Meets UL217 standards and complies with legislative requirements for 10 year battery operated smoke alarms
  • Equipped with a dual photoelectric and ionization smoke sensor to quickly detect both fast burning and smoldering fires
  • 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)
  • First Alert warranty extends ten years from the date of purchase with proof of the original sales receipt and the product should be free from defect in material and workmanship

Description

While all smoke alarms are designed to detect smoke, different sensing technologies react differently to certain types of fires. The fist alert Sa3210 dual sensor ten year alarm makes use of both ionization and photoelectric sensors to offer the earliest possible warning-regardlesss of the type of fire. Sometimes a fire can smolder for hours before erupting into flames. Photoelectric sensing technology is more sensitive than ionization sensing technology at detecting these sorts of smoldering fires, like those caused by cigarettes burning in couches or bedding. Other fires erupt into flames quickly, like kitchen grease fires or fires fueled by paper burning in a wastebasket. Ionization sensing technology is generally more sensitive than photoelectric sensing technology at detecting these sorts of flaming fires. This alarm is powered by sealed, ten year lithium batteries to provide continuous protection for ten year without battery replacement. Single test/silence button mutes unnecessary alarms and tests function. End of life timer sounds when it's time to replace your alarm. First Alert Sa3210 meets UL217 standards and complies with legislative requirements for 10-year battery operated smoke alarms. This product includes mounting hardware and is backed by a 10 year limited .

Brand: First Alert


Style: Standard Detection


Power Source: Battery Powered


Product Dimensions: 2"D x 5"W x 5"H


Item Weight: 0.65 Pounds


Alarm: Audible


Sensor Type: photoelectric


Global Trade Identification Number: 18


Number of Items: 1


Manufacturer: First Alert


Brand: ‎First Alert


Style: ‎Standard Detection


Power Source: ‎Battery Powered


Product Dimensions: ‎2"D x 5"W x 5"H


Item Weight: ‎0.65 Pounds


Alarm: ‎Audible


Sensor Type: ‎photoelectric


Global Trade Identification Number: ‎18


Number of Items: ‎1


Manufacturer: ‎First Alert


UPC: ‎029054015518


Part Number: ‎SA3210


Item Weight: ‎10.4 ounces


Item model number: ‎SA3210


Batteries: ‎1 Lithium Metal batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Size: ‎1-Pack


Pattern: ‎SA3210FF


Voltage: ‎120 Volts


Item Package Quantity: ‎1


Included Components: ‎smoke alarm, batteries


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Warranty Description: ‎10 Year Limited Warranty


Date First Available: July 13, 2015


Frequently asked questions

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Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Easy as can be!
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
Pull the plastic tab out and it's ready to go. 2 toggles and screws go right into the wall and and bracket is up easily. Tighten the screws and spin the alarm on the bracket until it slides in the the grooves.
Reviewed in the United States on June 30, 2025 by SAB

  • Smoke detector
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
After many years, I finally had to replace one of these in my home. Easy to use, easy to install, and I highly recommend for the price. Will keep buying them as needed.
Reviewed in the United States on June 28, 2025 by Greg T from Phoenix

  • peace of mind
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
It was super easy to install, and the test/silence button is a convenient feature. The alarm is loud and clear exactly what you want in an emergency. Battery-powered means no wiring hassle, and it’s compact enough to fit seamlessly in any room. Reliable, straightforward, and great for home safety!
Reviewed in the United States on June 20, 2025 by Taylor Marsh

  • Smaller than the original First Alert alarm.
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
Wish it would have fit the existing First Alert alarm, which was supposed to last 10 years but only lasted four. But it was no big deal to change the mount - it used the same screw holes.
Reviewed in the United States on May 28, 2025 by Amazon Customer

  • Smoke alarms
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
I bought a ten year one lasted 3 years and are so sensitive.i went back to the battery ones they are more dependable i will buy more in the future
Reviewed in the United States on June 27, 2025 by tammysteers

  • exceeded my expectations!!
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
good quality, does the job! would buy again, great price!
Reviewed in the United States on July 6, 2025 by gary haynes

  • Great Value
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
This smoke detector is a great price, installs easily and works great!
Reviewed in the United States on July 3, 2025 by A Blaine Dockery

  • Basic smoke detector battery operated
Size: 1-Pack Style: Precision Detection Pattern Name: SMI100
Basic smoke detector - Battery operated. The back shares plate with plug in kind but it not functional. Just less parts to manufacture. Waiting for the new wireless unit that replaced the nest protect so this was just to get by tell then. Hard to beat price
Reviewed in the United States on June 3, 2025 by Me

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