• Visit our Support Center
  • Check your Order Status
  • Shipping, Delivery & Store Pickup
  • Returns & Exchanges
  • Price Match Guarantee

Order & Purchases

  • Check Order Status
  • Shipping, Delivery & Pickup
  • Returns & Exchanges
  • Price Match Guarantee
  • Product Recalls
  • Trade-In Program
  • Gift Cards

Payment Options

  • My Best Buy® Credit Card
  • Pay Your Bill at Citibank
  • Lease to Own
  • Buy Now, Pay Later
  • Best Buy Business Financing

Support & Services

  • Visit our Support Center
  • Shop with an Expert
  • Schedule a Service
  • Manage an Appointment
  • Protection & Support Plans
  • Haul Away & Recycling
  • Contact Us

Rewards & Membership

  • My Best Buy Memberships
  • View Points & Certificates
  • Member Offers

Partnerships

  • Sell on Best Buy Marketplace
  • Advertise with Us
  • Affiliates: Creators & Publishers
  • Best Buy Health
  • Best Buy Education
  • Best Buy Business
  • Partner+

About Best Buy

  • Corporate Information
  • Careers
  • Corporate Responsibility
  • Sustainability
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more ›
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.
$(csi.user.businessName)
Skip to contentGo to Product Search
Assistive Survey
Fall Football
Top Deals
Deal of the Day
Gift Ideas
My Best Buy Memberships
Credit Cards
Gift Cards
Trade-In
Best Buy Business
Main Content

Smoke & Carbon Monoxide Detectors

Filters

Skip To Results

Get it fast

Select Store
55423

Brand

Price

to

Features

Brand Compatibility

Best Buy

/

Smart Home

/

Home Security & Monitoring

/

Home Alarms & Sensors

/

Smoke & Carbon Monoxide Detectors

Smoke & Carbon Monoxide Detectors (1)

Sort by:
  • Front. Ultrahuman - HOME - PM1, PM2.5, PM10, and CO Particulate Sensor - VOC, CO, CO2 HCHO, Smoke, Noise, Motion, and Light Detector - Silver.

    Ultrahuman - HOME - PM1, PM2.5, PM10, and CO Particulate Sensor - VOC, CO, CO2 HCHO, Smoke, Noise, Motion, and Light Detector - Silver

    Syndicated rating, 4.857143 out of 5 stars with 7 reviews on Ultrahuman.

    4.9
    (7 reviews from Ultrahuman)
    $399.00$39900

    Get it by Mon, Sep 28 • FREE

Sponsored
Sponsored
Sponsored

Buying smoke and carbon monoxide detectors

Benefits and advantages of modern smoke alarms and CO detectors

There are many home monitoring devices and detectors, such as water leak sensors, that can alert you to problems around your home, but detectors that can warn you about fire and hazardous gases are perhaps the most essential for all homes and businesses.

While smoke detectors have been used to call attention to fire danger in homes for over half a century, their capabilities have improved. And carbon monoxide alarms are slightly newer but no less crucial. Carbon monoxide (CO) is an invisible and odorless gas that can be released due to malfunctions in heating sources, such as furnaces or generators. CO gas can easily reach fatal levels undetected. That's why installing carbon monoxide detectors in your home should be a top priority. Both of these life-saving devices should be installed in bedrooms and other locations throughout your home and replaced every 10 years. The batteries should be changed on a regular schedule even if the device is hardwired. And you should also test the detectors for proper functioning once a month.

Installing smoke and carbon monoxide alarms

Whether you’re replacing existing detectors or installing one for the first time, you have options. For smoke detection, there are two technologies available: photoelectric and ionization. Each of these performs best at detecting distinctly different kinds of fires. So, it is good to have both kinds represented in your home. You can also choose a single-function unit or a combination smoke and carbon monoxide detector. Additionally, the innovations in smart home products extend beyond smart thermostats and smart home security devices and systems. Smart smoke and CO detectors can be connected to your home's smart system as well. That way, you will get alerts on your phone even if you’re out of the house.

While you can run your detectors on batteries, it is preferable to hardwire (though you should always install backup batteries in case of power outages). The best carbon monoxide detectors and best smoke detectors for your home will be the ones that fit within your budget while offering the widest and most consistent coverage throughout your home.