Best X Sense Smoke Carbon Monoxide Alarms in 2026

Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected

Simple to use, with a single test/silence button, and side-load battery compartment; Tamper-resistant locking brackets and universal mounting brackets make installation easy. Dust cover

First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert brand trust survey in February 2018)

Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

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

Battery operated to provide reliable detection, even during power outages; two AA batteries included

UL Certified with a 10-year limited warranty on alarm

Product 1: Easy to read digital display - allows for easy viewing of carbon monoxide levels

Product 2: Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire

Product 2: Protects during a power failure - smoke alarm operates on one, 9-volt battery in the back of the unit

Product 2: Whole home family protection - place 1 fire detector on each level of your home & in your bedroom

Product 2: Test-Hush Feature - silences the unit for approximately 7 minutes

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

Simple to use, with a single test/silence button, and EZ access battery drawer allows you to change batteries without removing alarm from the ceiling

First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert brand trust survey in February 2018)

It can ship within the US except New York

Test-Hush Feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling

UL Certified, 10-year limited warranty

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

No chirps to tell you the battery is low; Nest Protect tests its own batteries and gives you a Nightly Promise when you turn off the lights so you know everything is working

A Light in the Dark: Usually Nest Protect has its light turned off but when you walk underneath it Pathlight can light your way.

The Nest smoke and carbon monoxide alarm has sensors with a 10-year lifespan to help keep your family safe for up to a decade

With Safety Check you can test all your smoke and CO alarms with just a tap and get a full report once the test is done

Know from anywhere. Connect Nest Protect to Wi-Fi and it will send an alert to your phone if the alarm goes off or the batteries run low.

Tells you what and where. It speaks up to tell you if there’s smoke or CO and where the problem is, so you know what to do. Connectivity: Bluetooth 4.0 LE, Wi-Fi 4 (802.11n)

App Silence. Nest Protect is the first alarm you can hush from your phone. Simply walk to the Nest Protect that noticed the problem and open the Nest app.

Split-Spectrum Sensor. In an emergency, seconds count. Nest Protect uses two wavelengths of light to look for both fast and slow burning fires.

Heads-Up. Get a friendly voice alert so you can handle burning toast before it becomes a burning toaster.

10-year carbon monoxide sensor. Carbon monoxide is odorless, invisible and deadly. When there’s CO, Nest Protect tells you where it’s hiding.

Test/Silence Button: The single push of a button will either test or silence all units in the system

Full Home Coverage: Link up to 24 Link+ wireless smoke alarms, CO alarms, and combination alarms for maximum home protection

Easy to Install: This smoke and CO detector is easy to mount onto any wall or ceiling using the included accessories

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

Premium Quality: Made from a premium PC material, ensuring exceptional quality and protection; approved by the ETL and meets the UL 217 and UL 2034 safety standards

Meets Rvia or Nfpa Requirements And Is Listed To Ul 1484 Rv And Ul 2034 Rv

Product 1: Whole home family protection - place 1 carbon monoxide detector on each level of your home & in your bedroom to protect from poisonous gases

Product 2: Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire

Product 2: Protects during a power failure - smoke alarm operates on one, 9-volt battery in the back of the unit

Product 2: Whole home family protection - place 1 fire detector on each level of your home & in your bedroom

Product 2: Test-Hush Feature - silences the unit for approximately 7 minutes

Low battery warning - One chirp followed by warning “low battery”. The red LED light will flash. This pattern will continue every minute for the first hour. After the first hour the red LED light will flash once every minute accompanied by the chirp sound. The “low battery” warning will only sound once every fifteen minutes. Voice Hush Indication: “Hush activated” and “Hush cancelled” voice announcement

Alarm memory - The green LED will blink once every 16 seconds to alert a user when the unit has alarmed for smoke or has detected a concentration of CO. If the alarm has detected a CO level of 100ppm or greater, when the test/reset button is pressed the unit will announce “CO previously detected”. If the alarm has detected abnormal levels of smoke since its last test, it will produce three rapid beeps.

AC-Wire with battery backup, An included 9V battery protects during short-term power outages

Front-loading battery with unique battery door design

Voice warning with green and red LEDs

Photoelectric smoke sensor – May detect visible fire particles associated with slow smoldering fires sooner than an ionization sensor.

Tamper resistant

Test-Hush Feature - silences the unit for approximately 9 minutes

UL Certified, 10-year limited warranty

Easy Installation: All mounting hardware is included for fast and simple installation in minutes

Premium Quality: Made from high-quality materials and components, this hardwired combination alarm offers a long lifespan of up to 10 years

Flame-Retardant Material: The housing of the wireless interconnected smoke detector is made of flame-retardant and high-temperature resistant ABS material, ensuring the durability and stable operation of the device

85 dB Alarm: When one fire alarm is triggered, all units will emit a loud 85 dB alarm, which can wake even the heaviest sleepers

SAFETY FEATURES: With a built-in test button & low-battery warning, sleep soundly knowing your fire and carbon monoxide detector is operating at its best

EASY INSTALLATION: Simply apply mount to ceiling using 2 screws (included) and rotate the carbon monoxide detector and smoke alarm into the mount

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

Sound & LED Warning: When the fire alarm detects smoke or detect combustion particles in the air, it will alert in 85db and the red LED will flash rapidly to remind you to check. If fault, please clean dust or smoke inside smoke alarm with fan

Home Protection: According to US data analysis, a family fire begins every 38 seconds. The faster you know about the fire, the sooner you start moving your family, working fire detector reduces the risk of home fire deaths by 50%

【Easy Installation】The smoke detector is operated with 1 year 9V battery. There are adhesive magnetic pads in the box to help you install the alarm easily on ceiling or wall in seconds, without worrying about the size, mounting plate and rewiring

【10-Year Product Life】The smoke alarm has 1-year 9V battery. This smoke alarm can be used for ten years with continuous battery replacement. Working smoke detector cut the risk of dying in a home fire by 50% while a home fire starts every 83 seconds! The faster you realize a fire warning, the more time to escape from the fire

Fully automatic battery-powered operation - no wiring required for this leak sensor. Like your smoke and carbon monoxide detectors, a low battery warning chirps an alarm when it is time to replace the 9V battery

Place in basements, bathrooms, kitchens, or wherever there is a potential for leaks. Common placements of the leak detector are near sump pumps, water heaters, washing machines, dishwashers, under sinks, etc

9-volt battery backup provides protection during power outages

Meets Underwriters Laboratories (UL) requirements for safety standards

The digital display feature allows for easy viewing of carbon monoxide levels from 30-999PPM (parts per million)

Simple to Use: Test/Silence button enables you to test the alarm weekly, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, an alarm tone of over 85 dB will sound throughout your entire home, instantly alerting the entire household, even those in sleep

Quick & Easy Installation with Guaranteed Quality: Product Dimensions: 4 * 4 * 1.5 inch, Requires no rewiring; easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs; certified to meet the UL safety standards for your peace of mind and absolute confidence in our product. you can get: 1. two detector alarms with Mounting bracket, 2. one manual, 3. four screws.

You can customize your network by adding new devices to the existing network or disconnecting devices and creating new networks

The easy-to-read LCD displays the level in real time at CO as well as the battery life, so you are alerted to dangerous CO levels and know when to replace the battery

This smoke and carbon monoxide detector has a replaceable lithium battery; the low-battery feature warns you when the battery needs replacing so your home has uninterrupted smoke and CO detection

With an open-air transmission range of over 820 ft (250 m), it provides smooth communication between interconnected alarms, ensuring the entire home is protected with no blind spots

Practical LCD Display: Clearly indicates real-time carbon monoxide (CO) concentration in the surrounding air, as well as the remaining battery life and working status of the alarm; if a CO concentration of 30-999 ppm exists for a certain time period, the screen will be backlit blue, and the LED indicator will flash red 4 times every 5.8 seconds

A loud 85-decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise,Easy to Install and Use: The alarm can easily install with mounting bracket.No hardwired anymore

【Easy Installation & Operation】The co detector can be easily installed with included mounting brackets and screws. Powered by 3 AA batteries for easy replacement. Press the “Test” button to check if the device is working properly and to reset the smoke and carbon monoxide alarms. The alarm sounds loud so you easily hear.

【Zero-Risk Purchase】The combination smoke and carbon monoxide alarm complies with UL217 and UL2034 standards. We are committed to offering qualified products and best customer service. Full refund or free return within 60 days and 3 years free repair. Protect your home and family with smoke alarms!

Ultra-Thin Design & Large Button: This device measures only 1.1 in thickness. Portable design also suits for travel. Test or mute your alarm by simply pressing the button using a long stick rather than a ladder.

Quick Installation: Easy to install this smoke alarm and carbon monoxide detector with the provided adhesive tape or screws, without the need to hire an electrician.

Activate Before Using: Press and hold the test/silence button for 10 seconds until the led indicator lights up, then release the button. The alarm will generate a beep to indicate activation succeed.

If One Alarm Goes Off, All of Them Will: When one alarm is triggered, all emit a loud 85 dB sound, to ensure that everyone in your house is alerted; the backup battery ensures that all units are always connected and continue to function normally, even in the event of a power failure

Single Button Control: Simply press the test/silence button on one of the units to test or silence the entire interlinked system, without the need to operate each unit individually; the large, user-friendly central button allows for easy control with a long stick, with no climbing ladder required

[Safety & Convenience] Smoke and CO combined alarm adopts flame retardant high temperature resistant ABS material, does not contain any radioactive substances, will not cause harm to human body. Once installed, connect the device to the application and use it easily.

[Self-check Function] Carbon monoxide detectors and smoke alarms use an automatic test function that automatically checks the circuit, electronics and battery status every 80 seconds to ensure proper operation. A yellow light warning will alert you when a product goes wrong.

Replaceable Battery: The lithium battery can support 1-year continuous use and can be easily replaced by yourself

Worry-Free After-Sales Services: Comes with a 60-day money-back guarantee, 2-year warranty, and lifetime customer support with a response time of 24 hours

Battery-operated unit installs quickly and easily without an electrician，A single button tests the unit or silences the alarm. Low battery signal mute, quiets low battery signal for up to 8 hours

ARRANTY AND SERVICE: Our products provide after-sales service. If you have any questions about our products, you can contact us, we will reply to you as soon as possible within 24 hours.

Enables extension of coverage & protection without any need for additional wiring

Ambient Light Sensing feature establishes a day/night cycle and prevents late-night battery chirps in dark conditions

LED warning light indicators alert you to various statuses: a green light indicates the unit is in proper working operation, an amber light indicates an operating error, and a red light indicate smoke or fire

Interconnection capability: allows you to connect up to 24 Kidde smoke, heat, or CO alarms, with the possibly it interconnect 6 strobe lights or relay modules

UL Certified, 10-year limited manufacturer warranty

Compatible with RemoteLync Bridge - Connect to the Kidde app for additional features and benefits