10 Best Plug In Carbon Monoxide Detector of December 2025

• 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)

Kidde

• 【High Sensitive & Quick Responsive】Build-in smart Carbon Monoxide Detector Chip and the electrochemical sensor, Enough to detect smoke and odorless, invisible and deadly carbon monoxide in the air, Quick reaction to save your life in the first time when fire hazard occurs.
• 【Component Advantage】Human Voice Notification Prompt, High reliable electrochemical sensor, Corbon monoxide concentration displaying (PPM), Low Current consumption, Ultra-long Standy time, Alarm Memory Function, Low Battery Prompt, Auto Detect Sensor Failure.
• 【LCD Digital Display】CO Detector offers Voice Notification and a digital readout of the CO concentration. Detecting level range: 0-999PPM. Alarm concentration: 30-999PPM. It can display both current reading and a peak reading from memory of the highest level measured over a period of time.
• 【Easy Installation & Widely Used】Coming with mounting bracket, screws and anchor plugs, just drill holes in appropriate positions, and done; Used for Each bedroom sleeping area in your home kitchen and living room, and any rooms with an increased risk of fire danger can be installed a smoke detector and carbon monoxide alarm.
• 【Warranty and Service】18 months worry-free product guarantee ensures long-lasting enjoyment of your purchase.And please contact seller first once you have any questions.

SiDell-US

• 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

Kidde

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

Kidde

• 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

• 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 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)

FIRST ALERT

• Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet
• 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 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
• 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)
• 120 volt AC plug in carbon monoxide alarm
• Uses electrochemical carbon monoxide sensor the most accurate technology available
• End of life timer; 7 year limited warranty

FIRST ALERT

• 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
• 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)

FIRST ALERT

• 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)

Kidde

• Alarm is easily installed in any of your AC wall outlets, giving you the choice of a direct-plug, a 6 power cord or a table top unit
• 6 ft. power cord included for table top option
• UL listed and offers a 7-year life and a 5-year limited warranty
• Loud 85 dBA pulsing alarm that will sound to alert you to a potential problem
• Peak level memory

Kidde