10 Best Carbon Monoxide Alarm of March 2024

List of Top Rated Carbon Monoxide Alarm from thousands of customer reviews & feedback.

Updated On Mar 2024

484 Reviews Studied

By Customer Ratings

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Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model # KN-COB-LP2 9CO5-LP2 Read Review

  • 2 AA battery backup
  • Low battery hush
  • Event memory
  • Loud 85 decibel alarm
  • Low battery signal

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Kidde Carbon Monoxide Alarm Detector | Digital Display | Battery Operated | Model KN-COPP-B-LPM Read Review

  • LED's - Green LED for normal operation, Red LED for alarm. Temperature range 40˚F (4. 4˚C) to 100˚F (37. 8˚C). Sensor: Electrochemical
  • Provides peace of mind against the silent killer and a digital display
  • Digital Display - Displays the level of carbon monoxide the unit is sensing. Shows CO level in PPM (parts per million). Updates digital reading every 15 seconds allowing you to see if levels change. Peak Level Memory displays the highest CO concentration measured since the last reset
  • Battery Operated - Provides best protection during power outages. Battery Safeguard makes it difficult to close the cover without batteries in the unit. Low Battery Signal alerts user when the batteries need to be replaced. Slide-Out Battery Door Cover gives immediate access to batteries
  • Test/Reset Button - Tests unit’s electronic circuitry & horn and resets the unit during alarm. Tests CO alarm circuit operation and allows you to immediately silence the alarm

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Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3 Read Review

  • Peak level button – Displays the peak CO level recorded by the alarm since it was last reset or unplugged
  • Test button functions – Tests the unit for proper operation and resets the carbon monoxide alarm
  • LED operation – Blinking dot in lower right corner of display denotes normal operation
  • Ten years after the initial power up, this alarm will “beep” two times every 30 seconds to indicate that it is time to replace the alarm.
  • Note: This CO alarm is not battery operated. However, these alarms are equipped with 9 volt battery backup – the 9 volt battery is to supply short term back-up during a power outage.
  • Power source: 120VAC. Temperature range-40˚F (4.4˚C) to 100˚F (37.8˚C). Humidity range-5%-95% relative humidity (RH)

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Kidde AC Carbon Monoxide Detector Alarm | Plug-In with Battery Backup | Model KN-COP-DP2 Read Review

  • Tamper resist feature – Can be activated to cause unit to go into alarm if it has been unplugged or has come loose from the outlet
  • Two LED’s: Red - Illuminates when in alarm mode. Green – AC power is present, normal operation
  • Test/reset button: Tests CO alarm circuit operation and allows you to immediately silence the alarm
  • End of life alarm: Alerts user to replace CO alarm after 10-years of operation
  • Provides peace of mind against the silent killer; Temperature Range: 40˚F (4.4˚C) to 100˚F (37.8˚C)

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Kidde 21026043 Battery-Operated(Not Hardwired) Combination Smoke/Carbon Monoxide Alarm with Voice Warning KN-COSM-BA Read Review

  • Voice Alarm –Announces the hazard type detected thereby helping to speed up the correct reaction to the hazard detected. Alarm announces “Fire ” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected
  • Combined Carbon Monoxide and Smoke Alarm – A single unit can be installed where previously, two were needed. Reduces installation time and helps to keep home décor attractive.
  • Audio alarm: 85 dB at 10 feet. Test/Reset Button and LEDs – Tests alarm circuitry and triggers the voice announcement. Flashing green for normal operation and flashing red for alarm condition. Humidity Range: 10 percent to 95 percent relative humidity non-condensing
  • Battery - Provides protection even during power outages when many fire and carbon monoxide incidents occur. The unit warns of a low battery condition by announcing “low battery” and by initiating an alarm chirp and activating a flashing red LED. The battery door will not close unless the batteries are properly installed. Note : The date printed on the item is manufacturing date, not the expiration date. Refer to the PDF attached below in Technical Specification for Manual.
  • Voice Announcements - Hush Feature temporarily silences nuisance alarms with “HUSH MODE ACTIVATED” and “HUSH MODE CANCELLED” voice announcement. If the alarm had detected a CO level of 100ppm or higher, the unit will announce “CARBON MONOXIDE PREVIOUSLY DETECTED” to warn of the CO incident, when the Test/ Reset button is pressed. Temperature Range: 40˚F (4. 4˚C) to 100˚F (37. 8˚C). Voltage (volts): 4. 5

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First Alert Smoke Detector and Carbon Monoxide Detector Alarm | Battery Operated, SCO5CN Read Review

  • 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 85 decibel siren provides a clear, loud warning upon detection
  • Battery operated unit installs quickly and easily without an electrician. Low battery signal mute, quiets low battery signal for up to 8 hours
  • Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling
  • 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety; All first alert alarms are rigorously tested to meet UL standards
  • It can ship within the US except New York
  • 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)

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Kidde 21026065 Smoke & Carbon Monoxide Alarm with Voice Warning Read Review

  • Combination smoke and carbon monoxide alarm – Smoke and CO sensing technologies work together to detect real fires faster and reduce nuisance alarms.
  • Voice alarm – Announces the hazard type detected thereby helping to speed up the correct reaction. Alarm announces “Fire” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected.
  • Sealed-in lithium battery – Sealed-in lithium power supply; No battery replacement required over the 10 year life of the alarm. Eliminates worry about battery removal or unauthorized deactivation of alarm.
  • Photoelectric sensor – Smoke alarm contains advanced photoelectric sensor that may detect visible particles (associated with smoldering fires) sooner than ionization alarms.
  • Self-activation – Alarm automatically activates when attached to the mounting bracket.

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First Alert ZCOMBO 2-in-1 Smoke Detector & Carbon Monoxide Alarm, Z-Wave Combo Read Review

  • Help keep your family safe with this battery powered smoke and carbon monoxide detector alarm
  • Unit uses wireless Z wave technology to send mobile alerts if the alarm goes off, so you are aware whether you're at home or away
  • Certified to work with smart home systems such as ring alarm security system, Samsung Smart things, and Nexia Home Intelligence when connected to a Z wave gateway hub (sold separately; Consult hub manufacturer to ensure compatibility with this first alert device); Not compatible with wink or Onelink
  • Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam
  • Electrochemical carbon monoxide sensor offers advanced detection technology
  • Includes an 85 decibel horn, single test/silence button, side access to a tamper resistant battery door, and pins that lock the alarm to the mounting bracket
  • 2 AA batteries (included)
  • 7 year limited warranty; Meets UL217 & UL2034 standards
  • 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)

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Kidde 21010170 10 Year Smoke and Carbon Monoxide Alarm Detector | Photoelectric | Kitchen | Model P3010K-CO Read Review

  • Combination smoke and carbon monoxide alarm – Smoke and CO sensing technologies work together to detect real fires faster and reduce cooking-related nuisance alarms.
  • Sealed-in lithium battery – Sealed-in lithium power supply; No battery replacement required over the 10 year life of the alarm. Eliminates worry about battery removal or unauthorized deactivation of alarm.
  • Photoelectric Sensor – Smoke alarm contains advanced photoelectric sensor that may detect visible particles (associated with smoldering fires) sooner than ionization alarms.
  • Self-activation – Alarm automatically activates when attached to the mounting bracket.
  • Alarm memory – Rapidly flashing LED alerts user if the alarm has sounded since the last time the test/reset button was used.

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First Alert CO400 Carbon Monoxide Detector, White, Pack of 1 Read Review

  • Keep your family safe with this easy to use, battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO 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
  • A loud 85 decibel alarm sounds when CO levels reach dangerous levels
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 5 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
  • All first alert CO alarms are rigorously tested to meet UL standards
  • 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)