The Best Carbon Monoxide Detector of 2023

Fire & CO detector in 1 unit with alert modes, LED lights, & 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 at 10 feet

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

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

PROTECTION FROM TWO DEADLY THREATS: One alarm protects against both dangerous smoke and carbon monoxide (CO) in the surrounding air; accurately detects CO from any potential sources; upgraded photoelectric and electrochemical sensors significantly increase the alarm’s sensitivity, enabling faster response times

10-YEAR BATTERY-OPERATED SMOKE & CO ALARM: A sealed lithium battery enables the unit to monitor your home 24/7, keeping you and your family safe and sound for up to a decade without frequent battery replacement; a low battery warning indicates the unit is coming to its end of life

PRACTICAL LCD DISPLAY: Clearly displays real-time CO levels above 30 ppm (parts per million) taken from the surrounding air, as well as the status of the alarm’s battery level

FASTER RESPONSE TO DANGERS WITH LOUD 85 DB ALARM: Gives you the earliest possible warning of smoke and CO threat with both a loud 85 dB alarm and a rapid flashing red LED indicator; this alarm is sure to wake up you and your family, even when sound asleep

SIMPLE INSTALLATION & OPERATION: Battery-operated unit installs quickly and easily without an electrician; one-button operation to test or silence the alarm

ASSURED QUALITY: Approved by the ETL and meets the UL 217 and UL 2034 safety standards; comes with a 60-day money-back guarantee, a 5-year warranty, and lifetime customer support

ACCURATE, RELIABLE & HIGHLY SENSITIVE TO CARBON MONOXIDE: Built with an advanced electrochemical sensor and intelligent chipset, the X-Sense carbon monoxide alarm quickly and accurately detects dangerous carbon monoxide (CO) leaks in the surrounding air; designed to give you the earliest possible warning of CO threat with a loud 85 dB alarm and a rapid flashing LED indicator (the LED indicator won’t disturb your sleep while the alarm is in normal working status)

LARGE LCD DISPLAY: Clearly displays the real-time CO levels in PPM (parts per million) taken from the surrounding air, with an updated measurement taken every 10 seconds; comes equipped with a peak level memory, showing you the highest CO concentration measured since the last reset

LED INDICATOR: Clearly informs you of the working status of the alarm with its 3-color flashing LED indicator (green LED indicates normal operation, red LED indicates the alarm status, and yellow LED indicates a fault), ensuring the safety and security of your home 24/7

10-YEAR BATTERY & PREMIUM MATERIAL: Comes with a 10-year sealed lithium battery for uninterrupted operation; housed in a frame made from premium PC plastic material that is both fire-retardant and highly durable; provides the ultimate protection for you and your family’s safety

ETL LISTED: Approved by the ETL and in conformity with UL 2034; we provide a 60-day money-back guarantee and 5-year warranty for all X-SENSE carbon monoxide detectors and smoke alarms; if you have any questions, please feel free to contact us, and we will get back to you within 24 hours

10-YEAR BATTERY LIFE: This combination smoke alarm and carbon monoxide 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

ALARM TYPES FOR MORE CONVENIENT: Different alarm patterns of this carbon monoxide alarm and smoke alarm tell you it is either smoke or carbon monoxide is detected without checking the LCD display; smoke alarm: delivers 3 long beeps every 1.5 seconds and the red LED flashes with the alarm sound; CO alarm: delivers 4 quick beeps every 5. 8 seconds and the red LED flashes with the alarm sound

HIGH ACCURACY AND SENSITIVITY: X-SENSE carbon monoxide fire alarm is equipped with combination photoelectric smoke and electrochemical CO sensors that work independently of each other; instantly notifies you when dangerous smoke or CO concentration is detected; provides the ultimate protection from 2 deadly threats, all contained in 1 unit

SIMPLE TO USE: The test/silence button of this smoke alarm carbon monoxide alarm 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 instantly alert the entire household, even those in sleep

EASY INSTALLATION WITH QUALITY: X-SENSE smoke carbon monoxide alarm combo requires no rewiring; easy to mount on any wall or ceiling without an electrician; all X-SENSE carbon monoxide alarm and smoke alarm are rigorously tested to meet UL 217 and UL 2034 safety standards; comes with a lifetime customer support

Phone Alerts: Nest Protect sends you a message when there's a problem or the batteries run low.

Smoke and CO Locator: Nest Protect speaks up if there's smoke or CO and tells you where it is so you know what to do

Detects CO: Carbon monoxide is an invisible poisonous gas. Nest Protect tells you where itâ€â„s hiding.

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

Fast Detection: Every second counts. The Split-Spectrum Sensor looks for both fast and slow burning fires.

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

Wireless: Working Wi-Fi connection: 802.11b/g/n @ 2.4GHz Wireless reconnect: 802.15.4 @ 2.4GHz Wireless Interconnect: 802.15.4 @ 2.4GHz Bluetooth Low Energy (BLE). Tells you what and where: It speaks up to tell you if there's smoke or CO and where.

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.

This Google Product features the Google Seal for Online Marketplace when purchased from a seller other than Amazon.com.

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. Field of View 120°

Wireless: Working Wi-Fi connection: 802.11b/g/n at 2.4GHz Wireless Interconnect: 802.15.4 at 2.4GHz Bluetooth Low Energy (BLE). 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.

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.

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 electrochemical Carbon Monoxide sensing technology as well as a photoelectric sensor equipped with Optipath 360 technology that enhances detection with 360 degree access and reliably detects smoke from smoldering fires

In case of danger, the loud spread spectrum alarm is designed to be heard easily by even those with some hearing issues

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

10 year limited warranty; Equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety

Rigorously tested to meet UL standards

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

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)

Keep your family safe with this talking battery operated smoke and carbon monoxide alarm; it's equipped with voice and location, so you are alerted of the danger and where it originates from across your house

Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 preprogrammed locations in your home

Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire

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

Electrochemical sensor, which is composed of a pump and a microprocessor, can accurately and efficiently reflects the detection data on the screen.

It will alarm wearer to take corresponding protective action by sound, light and vibration once the environmental CO gas concentration exceeds the preset alarm point.

Portable Small Size 110mm*45mm*32mm with IP67 waterproof and dustproof body, it’s also passed 2 meters drop test and have a 25~55℃working temperature range, you can take it wherever you want to go, it doesn't take up space.

This CO detector can be used continuously for 2 years if it is kept in a 24-hour working state.

You can contact our development engineer via amazon email.If you have any questions, please feel free to contact us.

✔️ Smoke Alarm and Carbon Monoxide Detector with LCD Display Combo Unit

✔️ Unit Comes With with Long Live Batteries

✔️ 5 year manufacturer warranty

✔️ 100% customer satisfaction guaranteed. if you dont like it will take it back no quations ask

✔️ Photoelectric Sensor Detects Smoke, While Minimizing false alarms.

Keep your family safe with this battery operated smoke and carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure

Features an electrochemical Carbon Monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire

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

Battery-operated unit installs quickly and easily without an electrician,Can connect to other compatible detectors, to ensure all alarms will sound when threat is detected

Simple to use, A single button tests the unit or silences the alarm. Low battery signal mute, quiets low battery signal for up to 8 hours

LED Indicator▶ The CO alarm has 2 LED indicator. The Green LED(STATUS indicator) is used to indicate work status of the CO alarm.The Red LED(ALARM indicator) is used to indicate alarm or warning status ofthe CO alarm. It is convenient for you to check the status of the alarm.

Test/Silence Button▶ The Test / Silence button allows you to test the alarm weekly to test the unit for proper operation, and easily silence the alarm when false alarms occur.

High Technology▶ The Carbon monoxide detector cotains electrochemical technology which is CO electrochemical figaro sensor and imported from Japan and has most accurate technology.

Protect Environment▶ Environment friendly, without smell, radiation or harm. It can keep you and your family safe at any time. So you can use our products with confidence.

24 Hours 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.

Fire & CO Detector in 1 unit with alert modes, LED light, test-silence button, & Replacement Alert: a chirp that notifies when the unit needs to be replaced

Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm

Protects during a power failure - CO detector operates on a 10-Year, sealed lithium battery

Easy installation & no battery fuss - CO alarm will automatically activate when attached to the mounting bracket

UL Certified, 10-year limited warranty

GUARANTEED QUALITY - All CO alarms are rigorously tested to meet UL standards.We promise and guarantee the customer service by providing a response to any questions, concerns, and inquiries within 24 hours.

PRACTICAL LCD DISPLAY - Clearly indicates real-time carbon monoxide (CO) concentration in the surrounding air, and working status of the alarm. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.

EASY TO USE - Simple to use, with a single test/reset button,when a dangerous level of carbon monoxide is detected the red LED will flashes and a loud alarm pattern will sound--Loud 85 decibel alarm with LED Flash.

ALARM STANDARD - 50ppm, alert within 60 to 90 minutes; 100ppm, alert within 10 to 40 minutes; 300ppm, alert within 3 minutes. Note: When you test the detector, please do not use gas blow the hole directly.

SIMPLE INSTALLATION - Operated by 2 * 1.5V AAA batteries (not included),portable and easy installation,no need for socket, not affected by power failure, can be installed anywhere! One-button operation to test or silence the alarm; A low battery warning indicates the unit is coming to its end of life.

Very easy to install at home or bedroom. Precise electro-optical sensor, high consistency and stability, move, or in the same place for that. Loud enough and sounds good.