Smoke Detectors On Sale

The First Alert SMCO210 Sealed 10-Year Battery Combo Smoke and CO Alarm with Slim Profile Design uses First Alert's Precision Detection advanced sensing technology and meets new industry standards. This 2-in-1 alarm provides convenient protection against both fire and carbon monoxide (CO). The alarm is also equipped with a 10-year sealed battery to eliminate the need for battery replacements and low battery chirps. First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.

Easy ordering and prompt delivery. Terry. Midwest. Wed, 21 Oct 2026

The fire safety you trust is now connected and compatible. Add smart fire safety alerts to your home with the First Alert SC5 Battery Smart Smoke and Carbon Monoxide (CO) Alarm. This 2-in-1 device elevates your home's fire and CO safety whether home or away. Seamlessly integrate the SC5 Battery-Operated Smart Smoke and CO alarm into your home's safety ecosystem if you need to add detection or if it is time to replace. Interconnect when installing so when one alarm sounds, all compatible alarms sound throughout the home to help provide an early warning. This smart 2-in-1 battery-operated alarm offers advanced features and the latest smoke alarm technology. The alarm will sound voice alerts with Heads-Up warning in the event of a fire or CO emergency. Alerts will tell you the type and location of danger in the home to help you escape. The alarm will also send mobile alerts through the First Alert app to keep you informed whether home or away.The SC5 Battery Smart Smoke and CO detector is easy to install and maintain to help ensure your home and family are protected. Test alarms are working properly using the app or the alarm's single test/silence button. The SC5 alarm also provides in-app and audible notices when the alarm needs to be replaced or when the batteries are running low to help eliminate late-night chirps.

Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup & Voice Alerts. Interconnects with most First Alert and BRK hardwired alarms. When one alarm sounds, all compatible alarms sound up to 12 smoke alarms and 6 other CO/heat alarms).

Jaime. Sat, 29 Aug 2026

The First Alert Carbon Monoxide Plug-In Alarm with battery backup features an electrochemical CO sensor to alert you to dangerous levels of carbon monoxide. This carbon monoxide detector plugs into any standard electrical socket to monitor CO levels in your home.

We are very happy with our recent purchase, as well as all of our past purchases. I would highly recommend Wayfair to my friends and family.. Dale. Rochester, MI. Fri, 10 Apr 2026

This plug-in electrochemical explosive gas and carbon monoxide alarm features a backlit digital display, this explosive gas, and CO detector plugs into any AC outlet with no additional mounting hardware needed.

It's an alarm -it seems to work -haven't had a chance to truly try it out -which is good -so that is all I have to say about that lol. Kimberly. Boston, MA. Tue, 10 Mar 2026

Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup. Smart Interconnect, interconnects with most First Alert and BRK hardwired alarms. When one alarm sounds, all compatible alarms sound (up to 12 smoke alarms and 6 other CO/heat alarms).

Carbon Monoxide (CO) gas is odorless, colorless, and toxic. This is why you need a reliable CO gas detector to keep you safe in your home and office. The American Red Cross® by Eton® Blackout Buddy CO is ETL® certified to UL® 2034 CO standards. If dangerous conditions are detected, the Blackout Buddy CO will blast an audible and LED flashing alarm. - even during a power outage - because it runs on both AC power and replaceable AA batteries! Also, when the power goes out, the Blackout Buddy CO automatically turns on its emergency light so you can use it as an emergency flashlight.

Brenda. Hinesburg, VT. Sun, 13 Sep 2026

Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup & Voice Alerts. Easy install & battey replacement, add protection in minutes. A battery pull tab is also included to keep the batteries fresh until the home is occupied.

Stacy. US. Thu, 23 Oct 2025

The First Alert SM210 10-Year Sealed Battery Smoke Alarm with Slim Profile Design is equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards. First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.

Our products feature solid materials and meticulous craftsmanship, delivering quality that stands the test of time for true durability. We also maintain affordable pricing with outstanding value, allowing you to enjoy reliable, high-quality items at a reasonable price—truly worth every penny.

Every home has a blind spot—the gate your two- or four-legged Houdini tests when you're at work, the sliding glass door that guests never latch properly, or the attic hatch that pops open on windy days. The Contact King Alert System targets that single access point with precision monitoring that transforms uncertainty into instant awareness. The 40-inch cable that provides flexible placement— whether monitoring your mailbox from inside, tracking a crawlspace entry, or knowing when the outdoor storage box gets opened. It's the one spot where you need to know even if you don't see Spot run. Combined with the Temperature and Humidity Sensor, you're not just monitoring access—you're maintaining environmental awareness too. Start with one critical location now, expand your system whenever you're ready. 3-PACK SET offers Peace of mind, three sensors at a time.

Accurate Leak Detection:This professional automotive smoke machine leak detector is designed to quickly locate leaks in EVAP systems, vacuum hoses, intake passages, turbo piping, and exhaust systems. Air Mode pressurizes the system to check sealing, while Smoke Mode visually reveals leak points. Dual air pumps provide stable and powerful smoke output. It includes multiple adapters and plugs. All components can be stored in the included bag, and the added hook allows convenient hanging for easier viewing.

Accurate Leak Detection：This professional automotive smoke machine leak detector is designed to quickly locate leaks in EVAP systems, vacuum hoses, intake passages, turbo piping, and exhaust systems. Air Mode checks system sealing, while Smoke Mode visually identifies leak locations. Dual air pumps provide steady and powerful smoke output. It includes a pressure gauge and multiple adapters and plugs. All components can be stored in the included bag, and the added hook allows convenient hanging for easier viewing.

Our products feature solid materials and meticulous craftsmanship, delivering quality that stands the test of time for true durability. We also maintain affordable pricing with outstanding value, allowing you to enjoy reliable, high-quality items at a reasonable price—truly worth every penny.

Common Leak Check Solution：This automotive smoke machine leak detector covers low- and mid-pressure testing needs for routine inspections. It helps diagnose emissions-related check engine lights by testing EVAP or vacuum systems at low pressure. It also locates small intake leaks using mid-pressure output. Basic adapters are included for common applications. All components store in the included bag, and the added hook allows easy hanging for better visibility.

Common Leak Check Solution：This automotive smoke machine leak detector covers low- and mid-pressure testing needs for routine inspections. It helps diagnose emissions-related check engine lights by testing EVAP or vacuum systems at low pressure. It also locates small intake leaks using mid-pressure output. Basic adapters are included for common applications. All components store in the included bag, and the added hook allows easy hanging for better visibility.

Accurate Leak Detection:This professional automotive smoke machine leak detector is designed to quickly locate leaks in EVAP systems, vacuum hoses, intake passages, turbo piping, and exhaust systems. It improves vehicle diagnostics efficiency. Air Mode checks system sealing, while Smoke Mode visually identifies leak locations. Dual air pumps provide steady and powerful smoke output. It includes a pressure gauge, flow meter, flow control knob, and multiple adapters and plugs. All parts are stored in the included bag.

Our products feature solid materials and meticulous craftsmanship, delivering quality that stands the test of time for true durability. We also maintain affordable pricing with outstanding value, allowing you to enjoy reliable, high-quality items at a reasonable price—truly worth every penny.

Accurate Leak Detection:This professional automotive smoke machine leak detector is designed to quickly locate leaks in EVAP systems, vacuum hoses, intake passages, turbo piping, and exhaust systems. Air Mode pressurizes the system to check sealing, while Smoke Mode visually reveals leak points. Dual air pumps provide stable and powerful smoke output. It includes multiple adapters and plugs. All components can be stored in the included bag, and the added hook allows convenient hanging for easier viewing.

Precise EVAP Leak Detection：This low-pressure automotive smoke machine leak detector is engineered for accurate diagnosis of sensitive EVAP and vacuum systems. It helps detect leaks without the risk of over-pressurization. Adjustable flow and a dedicated flow meter provide clear visual feedback during testing. The included EVAP adapter enables direct and targeted diagnostics. All parts store in the included storage bag. The unit rests securely on flat surfaces, and the compact body includes a handle for easy carrying.

Give your family peace of mind with this all-in-one safety monitor! It tracks carbon monoxide, gas leaks, and smoke simultaneously to keep you protected. You can easily check the temperature and humidity right on the crisp digital screen. The 85dB loud alarm ensures you’ll wake up, even from a deep sleep. It works during power outages thanks to the built-in rechargeable battery. It's super easy to detach and carry with you, and you’ll always feel secure whether at home or traveling in your RV.

Accurate Leak Detection:This professional automotive smoke machine leak detector is designed to quickly locate leaks in EVAP systems, vacuum hoses, intake passages, turbo piping, and exhaust systems. It helps improve vehicle diagnostics efficiency. Air Mode checks system sealing, while Smoke Mode visually identifies leak locations. Dual air pumps provide steady and powerful smoke output. It includes a pressure gauge and multiple adapters and plugs. All components can be stored in the included bag.

Accurate Leak Detection：This professional automotive smoke machine leak detector is designed to quickly locate leaks in EVAP systems, vacuum hoses, intake passages, turbo piping, and exhaust systems. Air Mode checks system sealing, while Smoke Mode visually identifies leak locations. Dual air pumps provide steady and powerful smoke output. It includes a pressure gauge and multiple adapters and plugs. All components can be stored in the included bag, and the added hook allows convenient hanging for easier viewing.

Works perfectly. Great tool to have!. Wanda. Euless, TX. Tue, 04 Aug 2026

The First Alert SMI100 Battery-Operated Smoke Alarm is equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards. This battery-operated smoke alarm is easy to install and the front access battery compartment makes for easy battery replacements.

The First Alert® SMCO100 Battery-Operated 2-in1 Combination Smoke and Carbon Monoxide Alarm provides protection against both threats in a single alarm. Installation of the battery-operated detector is simple - no wiring is required. Add fire and CO protection throughout your home in minutes and help prevent unwanted removal of the battery or alarm using the optional locking features. Easily test the battery-operated combination detector using the single test/silence button to help ensure it is operating properly and silence false alarms. A low-battery warning will tell you when to replace the alarm battery. Detectors themselves should be replaced at least every 10 years. The end-of-life warning will help notify you when it's time to replace. See user's manual for information on how and when to test and replace detectors.

The product alerts you to dangerous carbon monoxide levels. This carbon monoxide detector operates on a dual-power system with battery backup for continuous monitoring, even in the event of a power outage. The backlit digital screen tells you, at a glance, what the carbon monoxide and power levels are. The monitor also features a convenient test and silence button and an end-of-life timer that lets you know when it is time to replace the unit.

Thankfully, I have not had it go off due to us not having carbon monoxide in the home, but we test it every week and it’s loud!!!. Diane. Terryville, CT. Wed, 01 Jan 2020

The First Alert SM100V-AC Interconnect Hardwire Smoke Alarm with Battery Backup and Voice and Location Alerts meets the latest industry standards and is equipped with First Alert's Precision Detection advanced sensing technology. Battery backup provides protection during power outages and superior features to help provide an early warning and guide your escape to safety. First Alert's Precision Detection advanced sensing technology complies with the latest industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.

This First Alert carbon monoxide alarm features a 10-year built-in lithium battery for continuous monitoring during the life of the alarm, and uses an electrochemical carbon monoxide sensor and an 85-decibel alarm to alert you to CO threats. The advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, such as faulty fuel-burning appliances, blocked chimneys, and generators running inside or too close to homes. Because CO evenly distributes itself, it's important to have a CO detector on every level and in every bedroom of your home. This easy-to-use alarm features a digital display that shows ambient temperature as well as peak CO levels. The detector's stylish design looks great on top of a dresser or table.

Love the product… Easy to setup…Test Alarm feature is also very helpful.. Vamsi. US. Sun, 14 May 2023

The First Alert SM210V 10-Year Sealed Battery Smoke Alarm with Voice & Location Alerts helps guide your escape to safety. Utilizing First Alert's Precision Detection advanced sensing technology that complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency, the SM210V provides reliable and convenient protection.

Safety first right? Glad to have a battery that won't beep once a year!. Amy. Madison, WI. Tue, 19 May 2026

The SMCO200V Battery-Operated 2-in-1 Smoke Alarm & Carbon Monoxide Alarm provides reliable protection against both threats. Alarm features voice and location alerts and meets the latest industry standards. First Alert's Precision Detection advanced sensing technology complies with the latest industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.

Interconnect Hardwire Smoke Alarm with Battery Backup & Voice Alerts. Voice Warning with Location, voice tells what the danger is and its location. Smoke particles of varying number and size are produced in all fires. For maximum protection, use both ionization and photoelectric sensing technologies. Ionization alarms are generally more sensitive to fast flaming fires and photoelectric alarms are generally more sensitive to smoldering fires.

The First Alert Plug-In Electrochemical Carbon Monoxide Alarm alerts you to dangerous carbon monoxide. This carbon monoxide detector operates on a dual-power system with battery backup for continuous monitoring, even in the event of a power outage. The backlit digital screen tells you at a glance what the carbon monoxide and power levels are. The CO monitor also features a convenient test and silence button and an end-of-life timer that lets you know when it is time to replace the unit.

Like it reads—plug it in. Located it outside my furnace room.. Sydney. California, MD. Sun, 30 Jun 2024

Illuminate your path to safety with the First Alert SM210L 10-Year Sealed Battery Smoke Alarm with Safety Path Light. The SM210L smoke alarm also features First Alert's Precision Detection advanced sensing technology and meets new industry standards. The 10-year battery means no battery replacements for a decade.

The First Alert® SMCO210 Sealed 10-Year-Battery Combo Smoke and CO Alarm with Slim Profile Design uses our Precision Detection advanced sensing technology to meet the latest industry standards. This 2-in-1 alarm provides convenient protection against both fire and carbon monoxide (CO). The slim-profile combination alarm is half the depth of a standard alarm. It is sleek and compact to help the detector blend seamlessly with most home décor. And the 10-year lithium battery means no battery replacements for a decade – the end-of-life warning lets you know when it is time to replace the alarm. No more low-battery chirps and multiple battery replacements!

The First Alert SMI100-AC Interconnect Hardwire Smoke Alarm with Battery Backup meets new industry standards utilizing First Alert's Precision Detection advanced sensing technology. This hardwire smoke alarm is easy to install and replace existing detectors with no need to rewire. Plus interconnect compatible alarms to create a whole home alarm system to help provide an early warning. First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.

Our products feature solid materials and meticulous craftsmanship, delivering quality that stands the test of time for true durability. We also maintain affordable pricing with outstanding value, allowing you to enjoy reliable, high-quality items at a reasonable price—truly worth every penny.

Combined Gas & CO Detector: Connect this device to a home outlet, then it can continuously adjust the level of carbon monoxide (CO) and flammable gases such as natural gas, liquefied gas (LPG), methane (CH4), ethane(C2H6), propane (C3H8), butane (C4H10), etc. guard. High performance and long service life: This device uses the principle of electrochemical reaction and electrical resistance change of semiconductors to detect carbon monoxide and fire gases quickly and accurately. The sensors of this device have high performance and a long service life of about 5 years. Almost real-time detection: Compared to conventional CO and gas detectors, this device can detect carbon monoxide and fire gas much more often and faster, because the sensors in this device work every 2 seconds. As soon as this device detects fire gas or carbon monoxide with a concentration of more than 50 ppm, it immediately emits a loud acoustic alarm. Multifunctional: This device is also equipped with temperature and humidity sensors. It can accurately measure the temperature and humidity and display the corresponding measurements on the screen. Built-in rechargeable lithium battery: This device has a built-in rechargeable lithium battery with 1000 mAh as an emergency power supply. If the device is connected to an outlet and there is a sudden power outage, the device automatically switches to the power supply due to the built-in battery. The built-in battery can keep the device working for about 18 hours after full charge.

This portable carbon monoxide meter combines high accuracy and user-friendly design, featuring a large LCD display and durable ABS construction. It continuously monitors CO levels and sounds an audible alarm when concentrations reach dangerous levels. With a wide measuring range, fast response time, and energy-efficient operation, it is suitable for various industrial and commercial environments.

Combined Gas & CO Detector: Connect this device to a home outlet, then it can continuously adjust the level of carbon monoxide (CO) and flammable gases such as natural gas, liquefied gas (LPG), methane (CH4), ethane(C2H6), propane (C3H8), butane (C4H10), etc. guard. High performance and long service life: This device uses the principle of electrochemical reaction and electrical resistance change of semiconductors to detect carbon monoxide and fire gases quickly and accurately. The sensors of this device have high performance and a long service life of about 5 years. Almost real-time detection: Compared to conventional CO and gas detectors, this device can detect carbon monoxide and fire gas much more often and faster, because the sensors in this device work every 2 seconds. As soon as this device detects fire gas or carbon monoxide with a concentration of more than 50 ppm, it immediately emits a loud acoustic alarm. Multifunctional: This device is also equipped with temperature and humidity sensors. It can accurately measure the temperature and humidity and display the corresponding measurements on the screen. Built-in rechargeable lithium battery: This device has a built-in rechargeable lithium battery with 1000 mAh as an emergency power supply. If the device is connected to an outlet and there is a sudden power outage, the device automatically switches to the power supply due to the built-in battery. The built-in battery can keep the device working for about 18 hours after full charge.

Protect your home and family with the Plut 4-in-1 Combined Gas & Carbon Monoxide Detector, an all-in-one safety device designed to monitor carbon monoxide (CO), flammable gas, temperature, and humidity in real time. With a clear HD display, audible alarm, and convenient plug-in design, this gas detector provides continuous environmental monitoring for bedrooms, kitchens, living rooms, basements, hotels, and other indoor spaces.

Less than half the diameter and offering the same protection, the First Alert® SM210M 10-Year Sealed-Battery Micro Smoke Alarm meets the latest industry standards using First Alert®'s Precision Detection advanced sensing technology. It reduces cooking nuisance alarms and provides early warning in the event of a home fire emergency. The small but mighty smoke detector is easy to install and doesn't require battery replacements. Instead, its end-of-life warning lets you know when it’s time to replace the alarm. No more low-battery chirps and multiple battery replacements!

Be alerted to dangerous carbon monoxide leaks with the First Alert® CO410 Battery-Operated Carbon Monoxide Alarm with Backlit Digital Display. This carbon monoxide detector uses an electrochemical carbon monoxide sensor. An easy-to-read digital display allows for a quick view of current and peak carbon monoxide levels. This unit is powered by 2 AA batteries. It offers peace of mind even during power outages.

What characteristics are you concerned about when you are looking for a hand-held metal detector? Sensitivity, Easy Operation, Portability, or High Performance? This pinpointer comes with all the virtues that you want! The unique design with LCD display is more upscale and convenient. Once the metal detector is away from any metal object between 0-10 cm, the detector will beep.

Automotive Smoke Machine Leak Detector：utomotive smoke machine is the ultimate leakage testing companion! Whether it's EVAP system, fuel tank system, exhaust and intake system, car sealing test, this machine handles it all. Ideal for cars, motorcycles, snowmobiles, ATVs, light trucks — covering diagnostic needs with ease.

Automotive Smoke Machine Leak Detector:automotive smoke machine is the ultimate leakage testing companion! Whether it's EVAP system, fuel tank system, exhaust and intake system, car sealing test, this machine handles it all. Ideal for cars, motorcycles, snowmobiles, ATVs, light trucks — covering diagnostic needs with ease.

Our products feature solid materials and meticulous craftsmanship, delivering quality that stands the test of time for true durability. We also maintain affordable pricing with outstanding value, allowing you to enjoy reliable, high-quality items at a reasonable price—truly worth every penny.