Top 9 Carbon Monoxide Detector – Carbon Monoxide Detectors
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Led's - green led for normal operation, red led for alarm. 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.
Provides peace of mind against the silent killer and a digital display. Digital display - displays the level of carbon monoxide the unit is sensing. 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.

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.

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.
Low battery signal mute, quiets low battery signal for upto 8 hours. 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. Features an electrochemical Carbon Monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire.

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. To ensure complete protection make sure to place one on each level of your home and in each bedroom.


To ensure complete protection make sure to place one on each level of your home and in each bedroom. Low battery signal mute, quiets low battery signal for upto 8 hours. All first alert co alarms are rigorously tested to meet UL standards.
Simple to use, with a single test/silence button; a loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.

Refer to the pdf attached below in Technical Specification for Manual. Reduces installation time and helps to keep home décor attractive. Battery - provides protection even during power outages when many fire and carbon monoxide incidents occur.
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. Alarm announces “fire!” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected.

End of life timer; 7 year limited warranty. 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.
Uses electrochemical carbon monoxide sensor the most accurate technology available. 120 volt ac plug in carbon monoxide alarm. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.

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.
Test/reset button - tests unit’s electronic circuitry operation and allows you to immediately silence the alarm. Three convenient mounting options. Peak level memory - Recalls the highest CO concentration detected. Protects you and your family from two deadly threats: carbon monoxide and explosive gas.
1. Kidde
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Kidde 21008873 Monoxide Alarm
#adKidde #ad - Low battery signal alerts user when the batteries need to be replaced. Temperature range 40˚F 4. 4˚c to 100˚f 37. 8˚c. Sensor: Electrochemical. Shows co level in PPM parts per million. Battery operated - provides best protection during power outages.Led's - green led for normal operation, red led for alarm. 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.
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Battery safeguard makes it difficult to close the cover without batteries in the unit. Tests co alarm circuit operation and allows you to immediately silence the alarm. Provides peace of mind against the silent killer and a digital display. Digital display - displays the level of carbon monoxide the unit is sensing. 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.
Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 2.75 Inches |
Length | 4.5 Inches |
Weight | 0.01 Pounds |
Width | 1.5 Inches |
Part Number | 21008873 |
Model | 21008873 |
Warranty | 10 Year Limited |
More information #ad
2. Kidde
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Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3
#adKidde #ad - Note: this co alarm is not battery operated. Test button functions – Tests the unit for proper operation and resets the Carbon Monoxide alarm. Peak level button – displays the peak CO level recorded by the alarm since it was last reset or unplugged.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.
More information #ad
Temperature range-40˚f 4. 4˚c to 100˚f 37. 8˚c. Led operation – blinking dot in lower right corner of display denotes normal operation. Power source: 120vac. 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. Humidity range-5%-95% relative humidity RH.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 1.75 Inches |
Length | 6.06 Inches |
Weight | 3 Pounds |
Width | 3.75 Inches |
Part Number | 900-0076 |
Model | 900-0076-01 |
Warranty | 10 Year Limited |
More information #ad
3. FIRST ALERT
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SCO5CN, First Alert Smoke Detector and Carbon Monoxide Detector Alarm | Battery Operated
#adFIRST ALERT #ad - Battery operated unit installs quickly and easily without an electrician. Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling. 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.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.
More information #ad
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. Low battery signal mute, quiets low battery signal for upto 8 hours. 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. Features an electrochemical Carbon Monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5 Inches |
Length | 2 Inches |
Weight | 0.6 Pounds |
Width | 5 Inches |
Part Number | SCO5CN |
Model | SCO5CN |
Warranty | ------- |
More information #ad
4. FIRST ALERT
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Pack of 1, White, First Alert CO400 Carbon Monoxide Detector
#adFIRST ALERT #ad - A loud 85 decibel alarm sounds when CO levels reach dangerous levels. 5 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. To ensure complete protection make sure to place one on each level of your home and in each bedroom.
More information #ad
Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room. 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. All first alert cO alarms are rigorously tested to meet UL standards.Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 3 Inches |
Length | 5 Inches |
Weight | 0.45 Pounds |
Width | 1 Inches |
Part Number | CO400 |
Model | CO400FF |
Warranty | 7 Year Warranty |
More information #ad
5. Kidde
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Kidde Carbon Monoxide Detector Alarm | AC Powered with Battery Back-up | Model KN-COB-DP2
#adKidde #ad - End of life alarm : alerts user to replace CO alarm after 10-years of operation. Green – ac power is present, normal operation. 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.More information #ad
Two led’s : red - illuminates when in alarm mode. Test/reset button : tests CO alarm circuit operation and allows you to immediately silence the alarm. Provides peace of mind against the silent killer; Temperature Range: 40˚F 4. 4˚c to 100˚f 37. 8˚c.Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 4.5 Inches |
Length | 2.75 Inches |
Weight | 0.04 Pounds |
Width | 1.5 Inches |
Part Number | 900-0263 |
Model | KN-COB-DP2 |
More information #ad
6. FIRST ALERT
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1 pack, White, First Alert CO605 Plug-In Battery Backup CO Alarm
#adFIRST ALERT #ad - 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.To ensure complete protection make sure to place one on each level of your home and in each bedroom. Low battery signal mute, quiets low battery signal for upto 8 hours. All first alert co alarms are rigorously tested to meet UL standards.
More information #ad
7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety. 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. Simple to use, with a single test/silence button; a loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 5 Inches |
Length | 3.4 Inches |
Weight | 0.01 Pounds |
Width | 1.38 Inches |
Part Number | FATCO605 |
Model | CO605 |
More information #ad
7. Kidde
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Kidde 21026043 Battery-OperatedNot Hardwired Combination Smoke/Carbon Monoxide Alarm with Voice Warning KN-COSM-BA
#adKidde #ad - The battery door will not close unless the batteries are properly installed. Audio alarm: 85 db at 10 feet. Voice alarm –announces the hazard type detected thereby helping to speed up the correct reaction to the hazard detected.Refer to the pdf attached below in Technical Specification for Manual. Reduces installation time and helps to keep home décor attractive. Battery - provides protection even during power outages when many fire and carbon monoxide incidents occur.
More information #ad
Humidity range: 10 percent to 95 percent relative humidity non-condensing. Flashing green for normal operation and flashing red for alarm condition. 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. Alarm announces “fire!” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected.
Brand | Kidde #ad |
Manufacturer | Kidde Safety #ad |
Height | 5.6 Inches |
Length | 1.8 Inches |
Weight | 0.8 Pounds |
Width | 5.6 Inches |
Part Number | 21026043 |
Model | 21026043 |
Warranty | 5-year limited warranty |
More information #ad
8. FIRST ALERT
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CO600, First Alert Plug-In Carbon Monoxide Detector
#adFIRST ALERT #ad - 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. To ensure complete protection make sure to place one on each level of your home and in each bedroom.End of life timer; 7 year limited warranty. 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety.
More information #ad
Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet. A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. Uses electrochemical carbon monoxide sensor the most accurate technology available. 120 volt ac plug in carbon monoxide alarm. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.
Brand | FIRST ALERT #ad |
Manufacturer | First Alert #ad |
Height | 2.8 Inches |
Length | 8.5 Inches |
Weight | 0.3 Pounds |
Width | 6.75 Inches |
Part Number | CO600 |
Model | FATCO600 |
More information #ad
9. Kidde
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Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3
#adKidde #ad - Sounder alarm – the kn-coeg-3 offers a loud 85-decibel pulsing alarm that will sound to alert you to a potential problem. Two alarms in one detects carbon monoxide and explosive gas.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.
More information #ad
Digital display - Displays the level of carbon monoxide the unit is sensing. Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset. Test/reset button - tests unit’s electronic circuitry operation and allows you to immediately silence the alarm. Three convenient mounting options. Peak level memory - Recalls the highest CO concentration detected. Protects you and your family from two deadly threats: carbon monoxide and explosive gas.
Brand | Kidde #ad |
Manufacturer | Kidde #ad |
Height | 11 Inches |
Length | 2 Inches |
Weight | 1.2 Pounds |
Width | 8 Inches |
Part Number | KI-21006677 |
Model | Model KN-COEG-3 |
Warranty | 5 Year Limited |
More information #ad