January 23, 2026
10 Best Best Carbon Monoxide And Smoke Detector Combo of 2026
Last Updated - January 23, 2026
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Our Rankings
X-Sense
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X-Sense Smoke Detector Carbon Monoxide Detector Combo, 10-Year Battery Smoke Detector with Display, Standalone Model SC01, Single Pack
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Why We Love It
- Please Note: SC01 is a basic standalone unit; it does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for interconnection, search for SC01-W
- 10-Year Sealed Battery (Not AC Hardwired): Contains a long-life lithium battery that powers the device for its entire 10-year life
- 2-in-1 Protection: This combination detector protects your family against two dangers-both smoke and carbon monoxide
- Simple Installation: Requires no rewiring; easy to mount this fire and CO alarm on any wall or ceiling with the included mounting bracket, screws and anchor plugs
- Loud 85 dB Alarm: Upgraded photoelectric and electrochemical sensors significantly increase the sensitivity of the alarm for a faster response time while minimizing false alarms
- Premium Material: Made from an upgraded PC material that is heat-resistant, high-temperature resistant, and corrosion-resistant
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LEMONTAIL
2 Pack Smoke and Carbon Monoxide Detector,Smoke Detector Carbon Monoxide Detector Combo with Batteries,Fire Alarm Smoke Detector with Test Button and Digital Display
40% OffFree Shipping
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Main Highlights
- Two Sensors: Carbon monoxide detector smoke alarm has a 2-in-1 dual sensors, photoelectrical and electrochemical sensors. They work separately, no matter which one reaches their dangerous concentraion, combination smoke carbon monoxide alarm detector will go off with red led flashing
- Readable Digital Display:The screen of smoke detector carbon monoxide detector combo will display the CO or smoke concentration and illuminate when it goes off. This smoke detector has a standby mode, its screen will not be on and no need to worry about being disturbed under a standby mode. Under a standby mode, green led blinks about every 60s
- Loud Beep: This combination smoke carbon monoxide alarm detector has a louder than 85 decibels beep with red LED flashing. It is loud enough to let you know the danger and take ation to avoid it quickly. It is recommended to install more than one in your house for a maximum protection
- Red or Green Led function: This smoke alarm and carbon monoxide detector has a low battery warning, it will go off and blink red led. When dangerous concentration happens,it also goes off and blinks red led. Green led with beep is for test button to detect this fire detector and carbon monoxide detector's different working status
- Green Led Too Bright? : If you feel that the green led is too bright, it is recommended to cover with a transparent pvc until you feel good. This smoke detector is easy to install. Both wall and ceiling are suitable for installation
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Our Rankings
First Alert
First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White
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Main Highlights
- 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
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide
- Battery-operated alarm allows for easy installation and maintenance
- Test/silence button for efficient testing to ensure alarm is working properly
- End-of-life warning lets you know when its time to replace the alarm
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JNHCD
4 Pack 2 in 1 CO & Smoke Detectors, Digital Display, Smoke Detector Carbon Monoxide Detector Combo,Alarm for Home or Office,Powered by Battery
20% OffFree Shipping
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Main Highlights
- 2 in 1 CO & Smoke Detectors,Our Carbon Monoxide Detectors are designed to provide reliable and accurate sensing of both carbon monoxide and smoke, making them a versatile and essential security device for any home or office.
- Operated by 3 * AA Batter, no need for socket, not affected by power failure, Battery-powered Unit Can be Installed Quickly and Easily without an Electriciancan be installed anywhere!
- When a dangerous level of carbon monoxide is detected, the red light will flashes and a loud alarm pattern will sound---Loud 85 decibel carbon monoxide alarm with red light flash to protect your family's life and property safety from CO detector.
- Smoke Co Alarm Detector Using High Accurate Electrochemical Sensor Alerts you to Carbon Monoxide Danger, and Photoelectric Sensor Detects Smoke While Minimizing False Alarms. Insurance Safety of your Life.
- All Smoke and CO alarms are rigorously tested.We promise and guarantee the customer service by providing a response to any questions, concerns, and inquiries within 24 hours.
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Our Rankings
X-Sense
X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display (Standalone Model)
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Main Highlights
- Please Note: SC07 is a basic standalone unit; it does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for interconnection, search for SC07-W. For Wi-Fi functionality, look for SC07-WX or SC07-MR
- 2-in-1 Protection: The combination smoke and CO detector detects both smoke and carbon monoxide faster and more accurately using a photoelectric smoke sensor and an electrochemical CO sensor
- 10-Year Battery: The fire and CO alarm is built with a sealed lithium battery that provides 10 years of continuous power, saving you from changing batteries and power outage
- Combination Alarm with CO Readings: When the alarm is triggered, the LCD will display the CO concentration and illuminate. In standby mode, the LCD turns off to ensure you are not disturbed
- Simple Installation: Requires no rewiring; easy to mount this smoke and carbon monoxide alarm on any wall or ceiling with the included mounting bracket, screws, and anchor plugs
- Informative LCD: Displays real-time CO levels from 30999 ppm (parts per million) taken from the surrounding air, as well as battery level and working status
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Our Rankings
First Alert
First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
19% OffFree Shipping
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Main Highlights
- First Alerts 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
- Through early warning interconnect, when one alarm sounds, all compatible
- Quick Connect Plug allows for easy installation with no need to rewire
- Battery backup provides continuous protection during power outages
- Test/silence button for efficient testing to ensure alarm is working properly
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Our Rankings
AEGISLINK
AEGISLINK Smoke and Carbon Monoxide Detector 10-Year Lifespan with Replaceable Battery, Photoelectric Fire Alarm and Electrochemical CO Alarm with Test/Silence Button, SC200, 1-Pack
37% OffFree Shipping
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Main Highlights
- This smoke and carbon monoxide alarm has long-lasting sensors and components that deliver a long life of up to 10 years; also includes a replaceable 3-year lithium battery
- Informative LCD shows real-time CO concentrations and battery power to monitor for CO leaks and battery level; to save power, it will activate only when the device is tested or the ppm has reached the alarm level for a certain period
- Featuring a light and thin design, this combination smoke and carbon monoxide detector has a 215430 sq. ft (2040 m²) detection range, fully protecting you and your family from dangerous smoke and carbon monoxide
- This smoke and carbon monoxide detector is built with both a cutting-edge photoelectric smoke sensor and electrochemical CO sensor to deliver high consistency and reliability for double detection and protection
- The loud alarm tone is over 85 dB at 10 ft (3 m) to alert anyone in a deep sleep; with included screws and anchor plugs, this battery-operated unit can be installed effortlessly without an electrician
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Our Rankings
LEMONTAIL
Smoke and Carbon Monoxide Detector with Batteries,2-in-1 Smoke Detector Carbon Monoxide Detector Combo,Smoke and Carbon Monoxide Alarm with Test Button and Digital Display
41% OffFree Shipping
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Main Highlights
- Dual Sensors: This combination smoke carbon monoxide alarm detects both smoke and carbon monoxide. It's working method: a high sensitivity photoelectric sensor to detect smoke and high stability electrochemical co sensor to detect carbon monoxide. They are separate, no matter which sensor is triggered because of dangerous concentration, this smoke and carbon monoxide detector will beep and blink with red led
- Loud Beep: This smoke alarm has a louder than 85 decibels beep with red LED flashing. It is loud enough to let you know the danger and take ation to avoid it quickly. It is recommended to install more than one in your house for a maximum protection
- Red or Green Led function: Once smoke or carbon monoxide reaches their dangerous concentration, this smoke and carbon monoxide detector will go off and blink with red led. Red led and beep also let you know if batteries need to be replaced or not(capacity of battery is less than 3.6V). Green led with beep will work for test button to show fire alarm's different working status
- Readable Digital Display: when smoke or CO concentration reaches their dangerous level, the screen of fire alarm smoke detector will show the CO or smoke concentration and illuminate.STANDBY MODE: screen light will not be on under standby mode, so this will not disturb your sleeping. When this fire alarm smoke detector enters standby mode, its green led will blink about every 60s
- Green Led Too Bright? : If you feel that the green led is too bright, it is recommended to cover with a transparent pvc until you feel good. This carbon monoxide detectors smoke alarm is easy to install. Both wall and ceiling are suitable for installation
9
Our Rankings
X-Sense
X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo, Battery-Operated (Not AC Hardwired) Interconnected Combination Smoke Carbon Monoxide Detector, 5 Detectors with 1 Base Station, SC07-MR51
12% OffFree Shipping
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Main Highlights
- Note: Compatible only with 2.4 GHz Wi-Fi (incompatible with 5.0 GHz); connects to the X-Sense Home Security App via the included base station
- App Alerts: With the alarm setup in the app, youll get an instant alert when it is triggered, and the alarm and base station will both sound; youll also get handy alerts for low battery, faults, test results, and more
- All Alarms Sound As One: All Link+ Pro alarms connected to the base station will sound together if any one of them is triggered, ensuring everyone hears the alarm and can react quickly; the Link+ Pro series includes SC07-MR/XP0A-MR combination alarm, XS01-M/XS0B-MR smoke alarm, XC01-M carbon monoxide alarm, and XH02-M heat alarm
- App Test/Silence: Test or silence your alarms with just a tap in the app; no need to fetch a ladder to reach the test/silence button
- Easily Locate the Source Alarm: Name the alarm based where its located; when the alarms sound, tap the Locate button to silence the base station and other alarms, leaving only the triggered alarm active and displayed with room name
- Fast Fire Dispatch Within Just 3 Seconds: By subscribing to the (optional) Protect+ Premium subscription plan which provides 24/7 professional monitoring service, when an alarm is triggered, you will receive a message from the monitoring center within 3 seconds to verify the emergency. After the emergency is verified, a fire truck will be dispatched immediately
- 10-Year Combination Alarm: Benefit from this smoke and carbon monoxide alarm for an entire decade; replace the battery just once thanks to the 5-year CR123A battery
- Share the Convenience: Let up to 12 people control the device via the X-Sense app, making it easy for everyone to receive notifications, test and silence devices, check the alarms status, and more
10
Our Rankings
X-Sense
X-Sense Smoke Detector Carbon Monoxide Alarm Combo, 10-Year Non-Replaceable Battery, Not Hardwired, Model XP0H-SN, 1-Pack
25% OffFree Shipping
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Main Highlights
- Please Note: The XP0H-SN is a basic standalone unit; does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for an interconnected version, search for XP0H-WN
- 2-in-1 Protection, One Simple Solution: This combination alarm features built-in sensors for both smoke and carbon monoxide, delivering reliable 24/7 protectionall in one compact device
- 10-Year Sealed Lithium Battery: The long-life battery and reliable performance offer peace of mind without the hassle of battery changes, knowing your home is protected for a decade
- Large Mounting Bracket for a Clean Finish: Our extra-large 5.7-inch (145 mm) bracket covers more area than standard small ones, easily hiding old screw holes and ceiling stains from previous alarms; installation looks neat with no need for patching (Note: Please check that your existing device fits within this size before installation.)
- Built-in Self-Test: Automatically checks the sensors, electronics, and battery every 60 seconds to ensure the device is working properly and keeping your home and family safe
- Easy-to-Read LCD: See real-time CO levels and battery life at a glance; the LCD screen stays off during standby and only lights up when theres an alarm or testso it keeps you informed without disturbing your sleep
