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  • 2-in-1 Smoke and Fire Smart Alarm provides 10 years of continuous protection against fast flaming and slow smoldering fires.
  • New Security Sensing Plus® multi criteria smoke & fire sensor uses AI-artificial intelligence techniques that can differentiate and classify smoke & fire profiles.
  • 10 year permanent power via lithium-free alkaline battery (included) will never have to be replaced throughout the life of the alarm.
  • Built-in microprocessor virtually eliminates all nuisance alarms.
  • Maintenance free battery power provides 10 years of safety protection.
  • Power and alarm LED's
  • Test/silence button
  • Loud 85 dB alarm
  • Tamper-proof design prevents other from tampering with alarm's battery.
  • 10 year warranty on both battery & alarm
  • New Security Sensing Plus Multi Criteria Detection Technology

The USI AMIL3051SC 2-in-1 Sensing Plus® Smoke and Fire Alarm provides 10 years of continuous protection against deadly threats in the home. New Sensing Plus® Multi-Criteria Detection provides the benefits of both photoelectric and ionization alarms in one device to protect against fast flaming and slow smoldering fires. Perfect for new or replacement installations, this USI Electric Smoke Detector is suitable for houses, apartments and mobile homes. The sealed battery (included) will never have to be replaced throughout the life of the alarm, giving you a decade's worth in peace of mind even in the event of a power outage.

10 Year Permanent Power also saves money from battery replacements (up to $38.00 over the 10-year life of the alarm), eliminates annoying low battery chirps and helps the environment by reducing environmental waste from disposed batteries. This smoke and fire detector features microprocessor intelligence that assists in completely eliminating nuisance alarms, a single silence/test button to quiet a non-hazardous alarm and an end-of-service life warning that sounds when it's time to replace the smoke detector's battery (approximately 10-years from activation).

Perfect for replacing existing USI Smoke Detectors, this smoke and fire alarm features a large mounting base to cover imperfections in drywall and the option to replace retrofitting applications. The quick activation battery pull tab makes it easy to install while the deactivation key switches the alarm off and makes the batteries safe for disposal. Once the 10 year smoke and fire alarm is deactivated, the tamper resistant feature turns on to prevent deactivated alarms from being reinstalled.

This 10 year smoke and fire alarm conforms to UL 217 Standard 8th Edition. 8th edition smoke and fire detectors have also been approved by the California State Fire Marshal and Federal Housing Authority (FHA) to exceed industry standards. New Sensing Plus® Multi-Criteria Detection provides:

  • Resistance to False Alarms from Cooking.
  • Detection of Polyurethane Foam in both Slow Smoldering & Fast Flaming Fires.
  • Immunity to High-Voltage Current Surges.

For maximum protection, install a smoke and fire alarm inside every bedroom, outside every sleeping area and on all levels. The USI AMIL3051SC 2-in-1 Sensing Plus® Smoke and Fire Alarm comes with a 10-year limited warranty that covers both the battery and alarm.

Meets New Laws & Legislations - This alarm exceeds industry standards, and is listed to UL Standard UL 217 8th Edition and is California State Fire Marshal approved.

*New Security Sensing Plus® Detection Technology UL 217 8th Edition Tests Include:

  • Resistance to false alarms from cooking
  • Detection of polyurethane foam in both slow smoldering & fast flaming fires
  • Immunity to high-voltage current surges
smoke alarm ul 217 standard compliant
AMIL3051SC19 year battery smoke alarm
How often should I replace the battery in my smoke, CO and natural gas alarms?
Many of our alarms come with a 10-year sealed Permanent Power battery that never needs replacing during the 10 year life of the alarm. Batteries in non sealed alarms should be replaced at least once a year or when the low battery signal sounds. Permanent Power battery technology helps keep you safe, because working smoke alarms are an important factor in surviving a home fire.
What's the optimum placement of protection devices in my home?
Early detection of smoke, carbon monoxide, and natural gas is key to saving lives. The National Fire Protection Association (NFPA) recommends installing a smoke alarm on every level of your home, including finished attics and basements. You are also encouraged to install a smoke detector inside every bedroom and at the top of certain stairways.
Do I need four kinds of detectors or can one do it all?
You never know what kind of hazard will strike your home, or when. That's why we recommend technology that can detect carbon monoxide (CO) and natural gas as well as smoke and fire. You'll get the most protection from devices that can quickly and accurately detect and respond to a range of threats.
What are "nuisance alarms"? Why are they a concern?
A smoke alarm that goes off when there's no emergency is annoying. According to the National Fire Protection Association (NFPA), such "nuisance alarms" are the leading reason why homeowners intentionally disable their smoke detectors. Yet doing so can be deadly. A survey conducted by the NFPA found that smoke alarms sounded in only half of the home fires reported to U.S. fire departments, and almost two-thirds of home fire deaths resulted from fires in homes with no smoke alarms or no working smoke alarms.
Product Details

new sensing plus smoke alarms

Product Specs
Sensing Plus® Multi Criteria Smoke Alarms
Product Manuals

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AMIL3051SC customer reviews

Overall Rating

5 Reviews
5 customers recommend this product
USI Sensing Plus Living Area 10 Year Battery Smoke and Fire Alarm Reviews
David H
March 14, 2022
Verified Purchase
Does what its supposed to

Got it not that long ago, but it seems to work. no false alarms. installation was easy. Glad i'm not going to have to install new batteries!

Nathaniel H
February 18, 2022
Verified Purchase
They seem to work

No complaints about the smoke detectors. Haven't had a fire though, so hopefully I continue to not have complaints!

December 11, 2021
Verified Purchase
Easy to install, excellent product

I purchased from USI because they were the only ones who made a smoke alarm with both ionization and photoelectric AND a carbon monoxide detector. I put these ionization/photoelectric detectors everywhere except our bedrooms. I put combination smoke and carbon monoxide detectors in the bedrooms Since these are all hardwired, I have piece of mind that any issue anywhere in my home will alert us no matter where we are. There was an issue with my first order where I made a mistake and customer service did a fantastic job of fixing my mistake and getting the correct items out to me. I will recommend these detectors to my friends and extended family because they are first rate products and because of the excellent customer service.

Melissa S
April 16, 2021
Verified Purchase
Better protection

I needed to replace the cheap smoke detectors in my house and did a lot of research before purchasing these. I'm happy to have the protection of BOTH sensors smoke and fire and the ease and savings of a ten year battery. I've installed three so far and they seem to be in perfect working order!

Patrick Steece
January 1, 2021
Verified Purchase
Good product

I am pleased with the product & think it will provide better protection than the detector it replaced.

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