10 Best smoke and carbon monoxide detector (2025)

10 Best smoke and carbon monoxide detectors of 2025 offer advanced safety features to protect your home and loved ones. These top-rated devices combine smoke detection and carbon monoxide monitoring, ensuring comprehensive safety. With smart technology integration, many models provide real-time alerts to your smartphone, while others feature voice alarms for clear notifications. Battery life and ease of installation are also key considerations, with several options offering long-lasting power and user-friendly setups. Investing in one of these detectors not only enhances your home’s safety but also provides peace of mind in an increasingly uncertain world.

Bestseller No. 1

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 4 Pack

2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective detector.
ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, & FCC standards.
NO WIRING NEEDED: Operates on 2-AA alkaline batteries (included) providing easy installation, simply mount the bracket onto the ceiling and twist & click the 5-inch smoke & CO alarm into the bracket.
SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke or carbon monoxide detected & a loud 85-decibel alarm will sound.

Bestseller No. 2

3 Packs Smoke and Carbon Monoxide Detector Powered by Battery,Portable Smoke Detector Carbon Monoxide Detector Combo with Large LCD Display, Fire Alarm Smoke Detector for Home,Kitchen

【Dual Sensors Protection】Smoke and carbon monoxide detector adpots photoelectric sensor and electrochemical CO sensor design. 2-in-1 sensitive alarm on this smoke detector carbon monoxide detector combo, providing a safer area for anyone.
【Alarm and LED Indication】 Smoke and carbon monoxide detector has a real-time smoke and CO concentration on LCD display, once smoke or CO reaches its dangerous level, sensitive carbon monoxide alarm will give out both sound alert and red LED flash alarm, sound will be louder than 85 decibels.
【Low Battery Warning】 A smoke and carbon monoxide detector is powered by 3 batteries, smoke alarm will chirp once every 30s to remind user of replacing a new battery. Make sure that this carbon monoxide detector always keeps its working status in daily life.
【Easy to Install】The installation of fire alarm smoke detector is easy and wireless, it is easy to mount on any wall or ceiling, suitable for bedroom, kitchen, living room, basement, hotel, office, etc. Test button is for battery and alarm operation verification.
【Caution and Hints】 Smoke detector carbon monoxide detector combo adopts unique design. Do not use detergents or other solvents to clean the unit. Do not paint the unit. If you have any problems, please feel free to contact us.

SaleBestseller No. 3

First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack

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 in an easy to install alarm
10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
End-of-life warning lets you know when it’s time to replace the alarm
Slim profile design is half the depth of a standard alarm

Bestseller No. 4

X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display (Standalone Model)

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

SaleBestseller No. 5

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack

2-in-1 Detection - Smoke & carbon monoxide detector combo alerts you to both smoke & fire events as well as poisonous, CO gas in a single device
24/7 Self-testing components are always checking the device to ensure it's operating as expected (not a substitute for a manual push test)
Easy installation mounting bracket included for quick installation in 4 orientations
Photoelectric sensor detects visible fire particles associated with slow, smoldering fires, while the electrochemical sensor detects carbon monoxide
85-decibel alarm & LED warning indicators alert you to various status: green = normal operation, amber = operating error, and red = smoke, fire or carbon monoxide event

Bestseller No. 6

X-Sense Smoke Detector Carbon Monoxide Detector Combo, 10-Year Battery Smoke Detector with Display, Standalone Model SC01, Single Pack

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

Bestseller No. 7

Ecoey Smoke Detector Carbon Monoxide Detector Combo 7-Year Battery Operated Smoke and Carbon Monoxide Alarm with Visualized LCD Display and Test & Silence Function, 1 Pack

2-in-1 Protection: The smoke detector carbon monoxide detector combo equipped with an electro-optical smoke sensor and an electrochemical CO sensor, provides more comprehensive protection for the family
Avoid False Alarms with Higher Precision: The sensor in this smoke and carbon monoxide detector can use two wavelengths of light to detect the smoke generated by rapid combustion and smoldering fires, it also detects moisture, which can effectively minimizes the false alarm that sounds when we are cooking
7 Year batteries: The fire and CO alarm operates on 3-AA batteries ensures that you can use it for a long time and can easily replace the batteries. When the battery is low, the device will chirp once every 40 seconds and FAULT indicator (yellow) will be flashing, with LCD displaying the word ""Lb"", and the low battery symbol blinks
Test & Hush Feature: The TEST/HUSH button is used to test the device and to silence the unit during a smoke or CO alarm. Press and hold to enable TEST function, Or press to enable SILENCE function
LCD Display & Recognizable Lights: LCD display will indicate different icons in different states. The informative LCD keeps showing toxic symbols and real-time CO concentration in daily CO monitoring. Display flame symbol when smoke is detected. And the indicator lights display the working status through the three-color indicator light, without looking closely at the LCD display

SaleBestseller No. 8

Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators

2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective device.
NEVER-CHANGE 10-YEAR BATTERY: No low battery chirps or battery changes for 10 years & saves up to $40 over the life of the detector. (10-yr limited warranty on alarm, not a battery performance claim.)
ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, & FCC standards.
SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke or carbon monoxide detected & a loud 85-decibel alarm will sound.

Bestseller No. 9

Smoke Detector and Carbon Monoxide Detector Co2 Detector Battery Powered with Test/Reset Button 4 Pack

2-IN-1 ACCURATE, RELIABLE & HIGHLY SENSITIVE ALARM: Combination smoke detector and carbon monoxide detector can sensitively detect the threat of these two gases.
SOUND AND LIGHT ALARM: 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.
APPLICATION CO DETECTOR PLACE: This carbon monoxide detector suitable for all place where it is possible to produce carbon monoxide, such as your home kitchen, bedroom, bathroom, hotel, or you are in the barbecue time, your parking garage.
ENERGY SAVING: Operated by 3 AAA Batteries, You can hear the alarm when the power is low, don't worry about when to replace the battery.
QUICK EASY INSTALLATION: Requires no rewiring, easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs.

Bestseller No. 10

Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated , White - S3000BWES

Smoke detector and carbon monoxide detector that speaks up in a friendly voice to give you an early warning when there's smoke or CO in your home
Split Spectrum Sensor looks for both fast burning and smoldering, and tells you where the danger is
Get phone alerts so you know something's wrong even when you're away from home[1]
CO detector looks out for carbon monoxide and tells you where it's located
With App Silence you can silence the smoke alarm with your phone in the Nest app when there's only a little smoke

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