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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 eliminates virtually 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
  • USI 8th Generation Smoke Detector meets the latest industry standards.

The Universal Security Instruments AMI3051SB 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 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.

Bring Your Home up to Code with 8th Generation Alarms

Exceeding industry standards and meeting the latest UL 217 8th Edition for smoke detection, this smoke and fire detector features approvals from the California State Fire Marshal and Federal Housing Authority (FHA) for ultimate peace of mind. Its innovative Sensing Plus® Multi-Criteria Detection provides a trifecta of benefits: minimizing nuisance alarms from cooking, detecting both slow-smoldering and fast-flaming fires (including those in polyurethane foam), and remaining operational even during electrical surges.

For maximum protection, install a USI Smoke Detector inside every bedroom, outside every sleeping area and on all levels. The USI AMI3051SB 2-in-1 Sensing Plus® Smoke and Fire Alarm comes with a 10-year limited warranty that covers both the battery and alarm.

smoke alarm ul 217 standard compliant
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.

Battery-operated smoke alarms are a simple yet highly effective way to provide crucial fire protection for any home. Unlike hardwired alarms that are permanently connected to a building's electrical system, battery-operated alarms are completely self-contained, drawing all their power from a single, internal battery. This design provides maximum flexibility and convenience, as the alarms can be installed in virtually any location without the need for an electrical outlet or complex wiring. They are a popular choice for renters, those living in older homes without modern electrical systems, or for anyone looking to quickly enhance their home's safety by adding an alarm to a new location. While some models still rely on replaceable batteries that must be changed annually, modern technology has introduced advanced 10-year sealed battery models that offer a decade of maintenance-free, continuous protection, eliminating the risk of a dead battery.

Advantages of a Battery Operated Smoke Alarm

  • Ease of Installation: No wiring is required. You can simply mount it with a few screws and it's ready to go. This makes it a perfect DIY project for anyone, regardless of their electrical expertise.
  • Flexible Placement: Because they are not tied to your home's electrical wiring, you can place them in a wide variety of locations, including older homes where wiring may be impractical or costly to install.
  • Continued Operation During Power Outages: Unlike hardwired alarms that rely on a battery backup, a battery-operated alarm will continue to function normally during a power failure, ensuring uninterrupted protection.
  • Cost-Effective: The initial purchase price of a standard battery-operated alarm is typically lower than a hardwired unit, and it saves you the expense of hiring an electrician for installation.

Advantages of a 10 Year Battery Operated Smoke Alarm

  • Maintenance-Free for a Decade: With a sealed battery alarm, you never have to worry about replacing the battery for the entire 10-year lifespan of the alarm.
  • Eliminates Low-Battery Chirps: A constant source of frustration for many homeowners, the low-battery chirp is completely eliminated. The alarm will only chirp with an "end-of-life" warning after 10 years, letting you know it's time to replace the entire unit.
  • Tamper-Proof: Since the battery is sealed within the unit, it cannot be removed or tampered with. This ensures the alarm is always powered on and ready to detect smoke or fire, addressing a common safety risk.

The USI 10 Year Battery Smoke and Fire Alarm with Sensing Plus Technology (AMI3051SB) is an advanced, battery-powered solution designed for ultimate convenience and long-term protection. As a battery-operated alarm, it offers unparalleled flexibility and ease of installation. You can place it virtually anywhere in your home—inside bedrooms, outside sleeping areas, and on every level—without the need for complex wiring or professional installation. This is especially ideal for apartments, mobile homes, or for homeowners who want to quickly add an extra layer of safety to their property without the hassle of electrical work. The alarm is ready to go right out of the box with a quick activation battery pull tab, providing instant and reliable fire detection.

This battery smoke alarm incorporates Universal Security Instruments' innovative Sensing Plus Technology. This advanced, multi-criteria sensor is a major leap forward in fire detection, combining the strengths of both photoelectric and ionization alarms into a single device. The alarm uses artificial intelligence to differentiate and classify smoke profiles, allowing it to quickly and accurately detect both fast-flaming and slow-smoldering fires. This technology also virtually eliminates nuisance alarms caused by everyday activities like cooking, which is a leading reason people disable their alarms. By providing a smart, reliable, and hassle-free solution, the AMI3051SB smoke detector offers a superior level of safety that works for a full decade with no battery changes required.

AMI3051SB12 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.
How are battery-operated smoke alarms different from hardwired alarms?
Battery-operated alarms are completely self-contained, powered by an internal battery, and require no connection to your home's electrical system. This makes them easy to install and ideal for any location. In contrast, hardwired alarms are wired into your home's power supply and often include a battery backup for power outages.
WHERE SHOULD I INSTALL SMOKE ALARMS?
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?
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"?
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.
How do I install a battery operated smoke alarm or carbon monoxide detector?
Installation is a simple DIY project. Most models come with a mounting bracket and screws. After marking the location on the wall or ceiling, you can simply screw the bracket in place and then twist the alarm onto the bracket. For more information and installation instructions, please follow the instructions that were included with your specific model.
WHAT ARE 8th GENERATION ALARMS?
8th generation smoke alarms, featuring advanced multi-criteria smoke and fire sensors, represent a significant leap in fire protection technology. Complying with UL 217 8th Edition standards, USI 8th edition alarms incorporate the latest innovations to enhance fire detection. USI Sensing Plus technology, a hallmark of 8th generation detectors, offers superior protection against both fast flaming and slow smoldering fires while significantly reducing nuisance alarms.
IS THIS AN 8th GENERATION SMOKE DETECTOR?
Yes, all USI Sensing Plus Detectors meet new UL 217 8th Edition requirements for smoke alarms
How often should I test my smoke alarm smoke alarm or carbon monoxide detector?
You should test all of your smoke alarms and carbon monoxide detectors at least once a month. This is as simple as pressing and holding the "test" button on the unit until it sounds. This ensures the alarm's sounder is working properly.
Why should I choose a 10 year battery alarm?
A 10-year sealed battery alarm offers a decade of continuous protection without the need for battery replacements. This eliminates the risk of an alarm failing due to a dead or missing battery, saves you from the hassle of annual battery changes, and prevents the annoying low-battery chirps that often happen in the middle of the night. It's a "set it and forget it" solution for a full decade.
When should I replace my battery operated alarm?
Fire safety experts, including the NFPA, recommend replacing smoke alarms every 10 years. This is because the internal sensors can become less sensitive over time due to dust, dirt, and age. For alarms with a 10-year sealed battery, the replacement is straightforward, as the alarm will sound an end-of-life warning when it's time to be replaced.
Product Details

new sensing plus smoke alarms

Product Specs
UPC:
042741830515
MPN:
AMI3051SB
Category:
Battery Operated Smoke Alarms
Product Manuals

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AMI3051SB customer reviews

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6 customers recommend this product
10 Year Sealed Battery Smoke and Fire Alarm Reviews
Jean S
August 14, 2025
Verified Purchase
Going to order another!

We have had Universal products for years. Just moved and we installed them in our new home. We figure that the natural gas detector has saved us three times already. Smoke detector works well too.

Dewey B
July 31, 2025
Verified Purchase
Great Company to do business with!

Starting in 2016 as our (9Volt) alarm batteries failed I have replaced them with Universal Alarms with a 10 year life span. This allows us to eliminate the yearly replacing of batteries at various times over the years. The only way to go!

Doug B
March 21, 2024
Verified Purchase
AMI3051SB smoke and fire alarm

Ordered six of these online. Spoke to a salesperson first, very helpful. Units were very simple to install. Much more comfortable knowing these are a combination alarm.

Derek N
February 14, 2022
Verified Purchase
Great for bedrooms

These units replaced several older ones over 10-years old... advanced, compact, and easy to install and test.

Leslie P
February 5, 2022
Verified Purchase
Sensing Plus in 2022

After thorough review of brands and features I chose Sensing Plus because it has the most current 2022 industry standards for smoke alarms. They were easy to install in the same location as the old ones that were other brands. I ordered directly from USI Store to ensure they weren't expired or had been sitting in inclement weather.

Adam S
April 26, 2021
Verified Purchase
Good for high humidity areas

I've been looking for a detector that doesn't give error beeps when in high humidity. Given my location in the tropics this works great so far!

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