10 Best Co Detectors

After analyzing 125 products, scanning 4645 reviews, spending more than 36 hours of research and speaking with our test users, we think the Kidde 900-0076-01 KN-COPP-3 Nighthawk Plug in Carbon Monoxide Detector Alarm is the one of the Best Co Detector on the market.

Kidde 900-0076-01 KN-COPP-3 Nighthawk Plug in Carbon Monoxide Detector Alarm – Best Overall Co Detector

Kidde 900-0076-01 KN-COPP-3 Nighthawk Plug in Carbon Monoxide Detector Alarm
  • 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

First Alert CO605 Plug-In Battery Backup CO Alarm

First Alert CO605 Plug-In Battery Backup CO Alarm
  • 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
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 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 CO alarms are rigorously tested to meet UL standards. Item Length is 3.4 inches , Item Width is 1.38 inches and Item Height is 5 inches

Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-Copp-B-LPM

Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-Copp-B-LPM
  • 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
  • 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

First Alert Carbon Monoxide Detector| No Outlet Required – Best Budget Co Detector

First Alert Carbon Monoxide Detector| No Outlet Required
  • 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 Smoke Detector and Carbon Monoxide Detector Alarm |

First Alert Smoke Detector and Carbon Monoxide Detector Alarm |
  • 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

Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm – Premium Pick

Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm
  • Protects you and your family from two deadly threats: carbon monoxide and explosive gas.
  • Sounder Alarm - The KN-COEG-3 offers a loud 85-decibel pulsing alarm that will sound to alert you to a potential problem.
  • Digital Display - Displays the level of carbon monoxide the unit is sensing.
  • Peak Level Memory - Recalls the highest CO concentration detected
  • Test/Reset Button - Tests unit's electronic circuitry operation and allows you to immediately silence the alarm
  • Two alarms in one detects carbon monoxide and explosive gas
  • Three convenient mounting options
  • Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset
  • Battery backup 9 volt battery included
  • Kidde's carbon monoxide alarms meet the requirements of Underwriters Laboratories (UL), an independent facility that tests products for compliance with widely-accepted safety standards

Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model #

Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model #
  • 2 AA battery backup
  • Low Battery Hush
  • Event memory
  • Loud 85 decibel alarm
  • Low battery signal

Carbon Monoxide Detector 3 Pack CO Alarm Detector Battery Operated

Carbon Monoxide Detector 3 Pack CO Alarm Detector Battery Operated
  • 【High Sensitive & Quick Responsive】Build-in Carbon Monoxide Detector Chip and the electrochemical sensor, Enough to detect odorless invisible and deadly carbon monoxide in the air, Quick reaction to save your life in the first time when fire hazard occurs.
  • 【Alarm Warning】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.
  • 【Easy Installation & Widely Used】Coming with mounting accessories, just drill holes in appropriate positions, and done; Used for bedroom, kitchen, living room and any other area with a risk of fire danger can be installed a smoke detector and CO alarm.
  • 【ENERGY SAVING】3 * 1.5V AA battery powered CO detector (not included), Low Current consumption, Ultra-long Standy time. 12 months worry-free product guarantee, please contact seller first once you have any questions.

First Alert Dual-Power Carbon Monoxide Detector Alarm | Plug-In with

First Alert Dual-Power Carbon Monoxide Detector Alarm | Plug-In with
  • Keep your family safe with this digital display, 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; Peak Level feature displays the highest concentration of carbon monoxide measured
  • A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 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 CO alarms are rigorously tested to meet UL standards

First Alert BRK SC9120B Hardwired Smoke and Carbon Monoxide (CO)

First Alert BRK SC9120B Hardwired Smoke and Carbon Monoxide (CO)
  • 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 that detects the fine particles of a fast burning 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
  • 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
  • Rigorously tested to meet UL standards

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