Smoke Detectors

This dual-function alarm detects both smoke and carbon monoxide, with a clear digital display showing real-time gas concentration levels (PPM). When either gas is detected, the device emits a loud, continuous beep to ensure prompt alerts. Powered by 3 AA batteries (batteries not included — customers are required to supply their own due to national regulations). Designed with low power consumption for extended standby life, and features a low battery warning along with automatic sensor fault detection. A smart, reliable safety solution for any home or workspace.

I had for a while now and actually like them. Had some guest over that actually inquired about them said they were better than just the plain smoked detectors and I must agree.. Antoine. Bennettsville, SC. Fri Jun 19 2026

The First Alert SMI100 Battery-Operated Smoke Alarm is easy to install and features First Alert's Precision Detection advance sensing technology. The front access battery compartment makes for quick battery replacements and a low battery warning will advise when it's time to replace. Discourage unwanted removal of the battery or smoke alarm using the optional locking features. Use the convenient test/silence button on the front of the smoke alarm to check that it is operating properly and silence false alarms. An end-of-life warning will advise you when it’s time to replace because alarms don't last forever. Effortlessly install the CO400 Battery-Operated Carbon Monoxide Alarm throughout your home for reliable CO protection in minutes. Operation is simple. Test the CO alarm using the single test/silence button. The low battery warning will notify you when it's time to replace the alarm's battery, which is quick process due to the front access battery door, and an end-of-life warning will alert you when it's time to replace the alarm all together.

Venita. US. Mon Jan 05 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 Mar 10 2026

Smart WiFi Door and Window Sensor, No Hub Required Wireless Contact Sensor with App Alerts, Compatible with Alexa & Google Assistant(Battery Not Included)

The 3-in-1 Explosive Gas & Carbon Monoxide Alarm from First Alert(R) warns against natural/methane, propane and carbon monoxide. The digital display makes for easy reading during an alarm or when any button is pressed. The alarm plugs into any standard outlet with no additional mounting necessary and comes with a line cord, which offers multiple placement options. The alarm also comes with a battery backup in the case of a power outage and utilizes an electrochemical carbon monoxide sensor for increased accuracy. Meets UL standards.

its an alarm -how excited can you actually get over it -lol??. Kimberly. Boston, MA. Tue Mar 10 2026

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.

The SM200 Battery-Operated Smoke Alarm meets the latest industry standards featuring First Alert's advance sensing technology in an easy to install, slim profile alarm. 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.

Erika. Tue May 12 2026

Protect your home with the innovative Water Alert System, offering unparalleled peace of mind! Featuring rapid leak detection and immediate alerts through an 85dB alarm and smartphone notifications, you'll be the first to know when water is where it shouldn't be. Designed for effortless setup in kitchens, bathrooms, basements, and beyond, its robust build stands up to humidity and varied climates. Plus, enjoy long-lasting performance and timely battery alerts, ensuring your home is always safeguarded. Don't wait for disaster to strike; invest in the Water Alert System today and secure your sanctuary!

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, flow meter, flow control knob, and multiple adapters and plugs. All parts are stored in the included bag, and the added hook allows convenient hanging.

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.

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.

Perfect. Liz. Loudon, TN. Sat Feb 28 2026

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 Jan 01 2020

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 May 19 2026

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.

Reliable Carbon Dioxide Monitor for Indoor and Outdoor Environments:Monitor CO₂ levels effortlessly with our carbon dioxide monitor. High-accuracy infrared sensing ensures stable readings across different concentrations. With long-lasting battery power of 72-120 hours on standby and intuitive operation, it is ideal for outdoor spaces, offices, classrooms, and labs.

Supports leak detection for EVAP lines, vacuum hoses, intake passages, turbo piping, and exhaust systems. Suitable for cars, trucks, boats, motorcycles, and ATVs.

Install convenient 2-in-1 protection with the First Alert SMICO110 10-Year Battery Combination Smoke & Carbon Monoxide Alarm. This combination smoke and carbon monoxide alarm meets new industry standards is easy to install, and doesn't require battery replacements for a decade. 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.

Great smoke carbon monoxide detector. Installation was easy and I appreciate that the battery lasts ten years.. Michelle. Portage, OH. Sun May 31 2026

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.

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.

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, flow meter, flow control knob, and multiple adapters and plugs. All parts are stored in the included bag, and the added hook allows convenient hanging.

Enhance Your Treasure searching with the Professional Metal Detector for Adults & BeginnersVersatile Detection Modes: Switch effortlessly between All Metal, DISC, Memory, and Jewelry modes for aimed searches, whether you're looking for tokens, gold, jewelry, or general metal objects.High Accuracy & Pinpoint Function: Find hidden finds with confidence using the high-precision pinpoint feature, which enables you to locate objects quickly and accurately, minimizing unnecessary digging.Clear LCD Display: The easy-to-read screen provides real-time information on aim ID, depth, and battery status, ensuring you stay informed throughout your search.IP68 Waterproof Coil: Take your adventures to beaches, riversides, and wet environments—this detector features a waterproof search coil for reliable outdoor use.Ergonomic & Adjustable Design: Enjoy comfortable treasure searching with an adjustable shaft and lightweight, ergonomic construction, appropriate for all heights and extended use without fatigue.Stable Anti-Interference: Advanced technology reduces false signals and ensures stable performance in various terrains, from parks and fields to historic sites.Headphone Compatibility & Backlit Screen: Use the built-in headphone jack for quiet detection and utilize the backlight for easy viewing in low-light conditions.Whether you're a beginner or an experienced enthusiast, this professional metal detector is perfect for uncovering tokens, gold, jewelry, and other valuables. Start exploring and unlock the excitement of discovering hidden finds in your own backyard or beyond!

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.

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.

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 Jun 30 2024

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.

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.

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.

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.

Accurate Leak Detection:This professional automotive smoke machine leak detector quickly locates 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 steady and powerful smoke output. It features three gauges, a flow control knob, and a full set of adapters and cap plugs. All parts are stored in the included bag, and the added hook allows convenient hanging.

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.

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).

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.

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!

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.

Don't let work ruin your health anymore! During the soldering process, a large amount of harmful fume will be generated. Our fume extractor can quickly inhale and filter the harmful gases, particles, dust, and other substances generated during your work, preventing your health from being threatened after inhalation and making your work environment healthier.

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.

Reliable Carbon Dioxide Monitor for Indoor and Outdoor Environments: Monitor CO₂ levels effortlessly with our carbon dioxide monitor. High-accuracy infrared sensing ensures stable readings across different concentrations. With long-lasting battery power of 72-120 hours on standby and intuitive operation, it is ideal for outdoor spaces, offices, classrooms, and labs.

Good. Ginger Mamma . Sun Jun 28 2026

Accurate Leak Detection:This professional automotive smoke machine leak detector quickly locates 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 steady and powerful smoke output. It features three gauges, a flow control knob, and a full set of adapters and cap plugs. All parts are stored in the included bag, and the added hook allows convenient hanging.

Easily install the First Alert SMCO200 Battery-Operated Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design. The alarm is half the depth of a standard alarm and provides reliable 2-in-1 smoke and carbon monoxide protection. Meets new industry standards with First Alert's Precision Detection advanced sensing technology. 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.

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.

The First Alert SMI110 10-Year Sealed Battery Smoke Alarm provides reliable protection and meets new industry standards. First Alert's Precision Detection advanced sensing technology helps reduce cooking nuisance alarms and provides an early warning. The 10-year sealed battery makes installation of the alarm easy and no battery replacements are needed for the life of the alarm.

Erika. Tue May 12 2026

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 quickly locates leaks in EVAP systems, vacuum hoses, intake passages, turbo piping, and exhaust systems. It detects even small leaks. Air Mode pressurizes the system to check sealing, while Smoke Mode visually reveals leak points. Dual air pumps provide steady and powerful smoke output. It features three gauges, a flow control knob, and a full set of adapters and cap 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.

CO₂ Control Made Simple for Every Environment: Experience streamlined CO₂ control with our carbon dioxide monitoring controller. Dual infrared sensors provide stable measurements, and intelligent day-night sensing automates CO₂ supply. Switch between plant and human modes with ease, ideal for greenhouses, classrooms, or labs.

All-day protection for your home from water damage. This Water Leak Detector can be placed anywhere in your home where leaks and moisture are could to be a problem, such as the apartment, basement, laundry room, kitchen, bathroom, closet. When Water is detected, it will emit a 120dB sound to notice you or neighbors until the water dry or sensor turn off. So you can keep a small leak from becoming a disastrous situation to prevent costly repairs. Low-cost, simple, and effective device prevents property damage, monetary loss, health risks caused by water damage. How to Install: 1. Turn the switch to the “OFF” situation. Put 1*9V Battery (NOT included) in the right place. 2. Turn the switch to the “ON” situation. When the sensor is contacted with water, it will keep reminding until the sensor is dry.

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.