Best X Sense Smoke Carbon Monoxide Alarms in 2026

CO detector alerts with a loud 85dB warning signal indicating dangerous levels of carbon monoxide in your home

Plug-in that still works during a power failure - 2-AA batteries (included) provide backup for your CO alarm in the event of a power outage

Easy & quick installation - plugs into any standard AC wall outlet

Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet and also has a battery backup for continuous monitoring of Carbon Monoxide levels, even if there's a power failure

Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room

Simple to use, with a single test/silence button; A loud 85 decibel alarm sounds when carbon monoxide levels reach dangerous levels. Low battery signal mute, quiets low battery signal for up to 8 hours

Protects during a power failure - carbon monoxide alarm contains a 9V battery backup in case of plug-in failure. Temperature Range-40˚F (4.4˚C) to 100˚F (37.8˚C)

Easy installation - plug can be installed in any outlet of your home; or use the attached extension cord to place on a table or shelf

Peace of mind - when CO detection is normal, a red dot appears in the lower right corner & blinks; includes a test button

Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure

Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection.

Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection

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

Fire and CO detector in 1 unit with alert modes, LED lights, and voice alarm, that states, "Fire. Fire.", "Warning. Carbon Monoxide.", or "Low Battery."

Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire

Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries

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]

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: The informative LCD will show you the battery level and real-time CO levels in PPM (parts per million)

2-in-1 Protection: This combination detector protects against both smoke and carbon monoxide

Wireless Interconnection: When one alarm sounds, all alarms will go off

10-Year Sealed Battery: This wireless alarm features a 10-year lithium battery and will give a low battery warning

Fire & CO detector in 1 unit with alert modes, LED lights, & voice alarm, that states, "Fire Fire", "Warning Carbon Monoxide", or "Low Battery"

Ionization & Electrochemical sensor technologies - smoke detector detects invisible fire particles, while the CO alarm detects poisonous carbon monoxide gas; 85 decibel alarm alerts of fire

Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries

More Accurate with Intelligent Technology: This hardwired smoke and carbon monoxide detector combines an advanced photoelectric smoke sensor and a Figaro electrochemical CO sensor to detect smoke from smoldering fires and dangerous CO levels quickly

Hardwired Alarm with Replaceable Battery Backup: This combination smoke and carbon monoxide detector is AC hardwired with a 9 V battery backup, so the alarm can continuously monitor for smoke and CO even if there is a power outage

Interconnects Up to 18 Units for Full Coverage: You can connect up to 18 X-Sense 2-in-1 hardwired alarm, so when one alarm is triggered, all will sound together throughout your home

2-in-1 DETECTION: Detect both smoke and carbon monoxide with the DAB-TEK Carbon Monoxide Smoke Detector Combo

3 AA BATTERIES INCLUDED: No last-minute trips to the DIY store. This Smoke Alarm And Carbon Monoxide Detector comes with 3 long-life Batteries

PHOTOELECTRIC SENSOR: Opt for a Photoelectric Smoke And Carbon Monoxide Detector and reduce the likelihood of a serious fire spreading in your home

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 215–430 sq. ft (20–40 m²) detection range, fully protecting you and your family from dangerous smoke and carbon monoxide

Keep your family safe with this battery operated smoke and carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO and smoke levels, even if there's a power failure(Operated by 2 x 1.5V AA Batteries (not included)

2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently of each other; every second counts; detects both fast and slow-burning fires, and instantly notifies you when dangerous smoke or CO concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit

Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85dB siren provides a clear, loud warning upon detection

Combo Smoke and Co Detecor: Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms

10 Year Battery Operated: This combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in lithium battery; provides continuous monitoring of smoke and CO levels, even if there's a power failure; an end-of-life signal will let you know when it’s time to replace the unit for safety

Test/Slience Button: Tests the unit for proper operation and resets the carbon monoxide alarm,Alarm

【Advanced Sensor Technology】This smoke and carbon monoxide detector designed with 2 in 1 photoelectric and electrochemical sensor to achieve real-time detection of smoke and carbon monoxide leakage, and send out instant alarm, ensuring complete safety and save your home and family from any potential danger

【LCD Screen & Indicator Light】Equipped with a large LCD screen, our battery operated smoke detector shows the the real time concentration value of carbon monoxide in the air and the remaining battery life. The 3-color indicator light changes in different status. The red light when alarm sends out , yellow for error, and green light continuous flashes to indicate low power and need replace batteries

【Accurate & All-Around Protection】It will ensure that smoke triggers the alarm instead of interference by taking 3 separate smoke samples from the surrounding air .360° air inlet ring ensures complete accurate inspection without blind spots. Ensure whole family protection with 24hours monitoring by placing 1 carbon monoxide detector on each level of your home, in your bedroom, habitable portions of basements and attics, and more

Built-In 10-Year Battery: Built-in 10-year lithium battery spares you the hassle of frequent battery changes; Provides uninterrupted 24/7 protection.

2-in-1 Protection: Equipped with an electro-optical smoke sensor and an electrochemical CO sensor to protect your home from 2 potentially deadly threats.

High Sensitivity & Accuracy: Upgraded photoelectric and electrochemical sensors significantly improve alarm sensitivity, thus speeding up response time while minimizing false alarms.

2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently of each other; every second counts; detects both fast and slow-burning firesand instantly notifies you when dangerous smoke or Co concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats,all contained in 1 unit.

LCD Display: Cleary indicates real-time carbon monoxide (CO) concentration in the surrounding air, as well as the remaining battery life and working status of the alarm.

Test and Silence Button: Tests the unit for proper operation and resets the smoke and carbon monoxide alarm,Alarm Volume:Loud>85dB(A)at 1 meters. Loud 85-decibel alarm is desiqned to be heard easily. Please kindly press if false alarm.

Unique Voice Speaker - Unique smoke detector and CO detector alarms distinguish between smoke alarms and CO warnings. Co alarm: "Warning, carbon monoxide, evacuate! Smoke alarm: "Fire!" . Verbal warning system reduces confusion and helps people maintain order.

Reduced Cooking Nutrition Alert - This smoke and carbon monoxide detector uses photoelectric smoke sensing technology to quickly detect slow burns. It is suitable for many locations, especially in cooking areas, to reduce false alarms of cooking smoke.

Not Disturb Mode - With SITERWELL fire and CO detectors, you don't have to worry about your rest. In low voltage or fault mode, simply press the button and the alarm clock will go into non-disruptive mode, avoiding nighttime alarms and frequent flashes, and you can enjoy approximately 10 hours of silence.

10 YEARS LIFE: This smoke and carbon monoxide detector contains 1 built-in 3V lithium battery, and could keep for 10 year without replacing to protect environment and save time. Low battery warning will open when you need to change smoke detector

2-IN-1 FUNCTION: Photoelectric smoke sensor and electrochemical CO sensor work independently, smoke alarm prior to CO alarm. Smoke monoxide detector detects fast and slow-burning fires with minimized false alarms, provides you the ultimate protection

HOW TO TEST & SILENCE: Test and silence combo smoke CO alarm by pressing test/silence button, mute time last for 10 minute. Fire alarm tone is over 85 dB at 3 meter and will sound throughout your entire home

10-Year Product Life: This 120 V AC combination smoke and carbon monoxide detector features high-quality sensors and components which are built to last 10 years, protecting your home for a decade; it is hardwired into your home's power with a 9 V battery backup

Detects Both Smoke and CO: The X-Sense detector features a photoelectric smoke sensor that detects smoke from slow-burning fires, as well as an electrochemical CO sensor that detects dangerous CO levels in the air

Reliable Safety Network for Complete Monitoring: Interconnect up to 18 X-Sense hardwired detectors to detect potential danger anywhere in your home, for complete monitoring and safety

[2-in-1 Protection] The smoke and carbon monoxide detector features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to simultaneously detect the CO concentration and the larger smoke particles produced by smoldering fires.

[Informative LCD] Large display screen, clearly indicates smoke warning and real-time CO concentration in the surrounding air, as well as the remaining battery life and working status. To save power, it will activate only when the device is tested or the ppm has reached the alarm level for a certain period.

[7-Year Replaceable Battery] The 10-Year lifespan fire and CO alarm is Powered by 3 AA batteries for easy installation, without requiring an electrician. The sustainable power of battery supplies for 7 years and features 3 reminder modes to let you know when they need replacing：chirp sound, indicator light, and LCD display.

3-in-1 Smart Alarm provides 10 years of continuous protection against fast flaming fires, slow smoldering fires and carbon monoxide

Includes 10 Year Permanent Power Alkaline Batteries. Alkaline batteries are safer and more eco-friendly dispose than lithium batteries

Features microprocessor intelligence to virtually eliminate nuisance alarms

Combo smoke detector/carbon monoxide alarm detects two threats

Electrochemical CO sensor alerts you to carbon monoxide danger

Photoelectric sensor detects smoke while minimizing false alarms

【Premium and Reliable】This smoke alarm and carbon monoxide detector is made with advanced photoelectric smoke sensor and electrochemical CO sensor to achieve dual detection and protection, escorting you and your family. If you have any problem with our smoke alarm and carbon monoxide detector, please feel free to contact us.

【Smart Sound and Light Alarm】Our Combination smoke and carbon monoxide alarm is built-in smart chip and comes with photoelectric smoke sensor and electrochemical CO sensor, which will issue a 90 dB sound warning when it detects the concentration of smoke and carbon monoxide exceeding the warning, fast and accurate detects 215–430 sq. ft (20–40 m²) range.

【Large LCD Display and Energy Efficient】This carbon monoxide detectors with large LCD display will show battery charge and real-time CO level in PPM (parts per million), better understand detection data to take remedial action. The high performance dual sensor smoke alarm and carbon monoxide detector has sensitive response, high stability and low energy consumption, which is energy saving