September 4, 2026

10 Best Best Carbon Monoxide And Smoke Detector Combo of 2026

Last Updated - September 4, 2026

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Up to 16% off

1

9.9

Outstanding

X-Sense Smoke & Carbon Monoxide Alarm, SC06, 5-Pack

X-Sense

Clicked 397 times in the last week

X-Sense Smoke & Carbon Monoxide Alarm, SC06, 5-Pack

Why We Love It

Please Note: SC06 is a basic standalone unit; it does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for interconnection, search for SC06-W
Combination Smoke and Carbon Monoxide Alarm: One alarm to protect against 2 deadly threats, including smoke and carbon monoxide; accurately detects carbon monoxide from any potential source; tested and certified to meet UL 217 and UL 2034 safety standards
10-Year Battery-Operated Smoke and CO Alarm: A sealed lithium battery enables the unit to keep you and your family safe and sound for up to a decade with no need to replace batteries frequently; a low battery warning lets you know the unit is coming to its end of life
Faster Response to Dangers with Loud 85 dB Alarm: Upgraded photoelectric and electrochemical sensors significantly increase the sensitivity of the alarm for a faster response time while minimizing false alarms
Simple Installation & Operation: This battery-operated unit can be installed quickly and effortlessly without an electrician; one-button operation allows you to test and silence the alarm with ease
Premium Quality: Made from a premium PC material, ensuring exceptional quality and protection

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Why We Love It

Please Note: SC06 is a basic standalone unit; it does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for interconnection, search for SC06-W
Combination Smoke and Carbon Monoxide Alarm: One alarm to protect against 2 deadly threats, including smoke and carbon monoxide; accurately detects carbon monoxide from any potential source; tested and certified to meet UL 217 and UL 2034 safety standards
10-Year Battery-Operated Smoke and CO Alarm: A sealed lithium battery enables the unit to keep you and your family safe and sound for up to a decade with no need to replace batteries frequently; a low battery warning lets you know the unit is coming to its end of life
Faster Response to Dangers with Loud 85 dB Alarm: Upgraded photoelectric and electrochemical sensors significantly increase the sensitivity of the alarm for a faster response time while minimizing false alarms
Simple Installation & Operation: This battery-operated unit can be installed quickly and effortlessly without an electrician; one-button operation allows you to test and silence the alarm with ease
Premium Quality: Made from a premium PC material, ensuring exceptional quality and protection

2

9.5

Excellent

X-Sense Smoke Detector Carbon Monoxide Detector Combo, SC07, 1-Pack

X-Sense

X-Sense Smoke Detector Carbon Monoxide Detector Combo, SC07, 1-Pack

Main Highlights

Please Note: The SC07 is a basic standalone unit. It does not support wireless interconnection, Wi-Fi, or base station connection; for wireless interconnection, search for SC07-W
10-Year Protection, Zero Maintenance: A built-in sealed lithium battery powers the alarm for a full decadeno battery replacements, no late-night low-battery chirps, and no ladder climbing
Photoelectric Smoke Sensor and Electrochemical CO Sensor: Responds faster to slow-smoldering fires, helps reduce cooking-related false alarms, and reliably detects dangerous carbon monoxide
Simple Installation: No rewiring required; easily mount this smoke and carbon monoxide alarm on a wall or ceiling using the included mounting bracket, screws, and anchor plugs
Meets UL 217 & UL 2034 Safety Standards: Independently tested and certified to meet UL 217 and UL 2034 standards for smoke and carbon monoxide detection; clear certification markings help support safety checks and code-compliant installation

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Main Highlights

Please Note: The SC07 is a basic standalone unit. It does not support wireless interconnection, Wi-Fi, or base station connection; for wireless interconnection, search for SC07-W
10-Year Protection, Zero Maintenance: A built-in sealed lithium battery powers the alarm for a full decadeno battery replacements, no late-night low-battery chirps, and no ladder climbing
Photoelectric Smoke Sensor and Electrochemical CO Sensor: Responds faster to slow-smoldering fires, helps reduce cooking-related false alarms, and reliably detects dangerous carbon monoxide
Simple Installation: No rewiring required; easily mount this smoke and carbon monoxide alarm on a wall or ceiling using the included mounting bracket, screws, and anchor plugs
Meets UL 217 & UL 2034 Safety Standards: Independently tested and certified to meet UL 217 and UL 2034 standards for smoke and carbon monoxide detection; clear certification markings help support safety checks and code-compliant installation

3

9.5

Excellent

X-Sense Smoke Detector Carbon Monoxide Detector Combo, SC07, 3-Pack

X-Sense

X-Sense Smoke Detector Carbon Monoxide Detector Combo, SC07, 3-Pack

Main Highlights

Please Note: The SC07 is a basic standalone unit. It does not support wireless interconnection, Wi-Fi, or base station connection; for wireless interconnection, search for SC07-W
10-Year Protection, Zero Maintenance: A built-in sealed lithium battery powers the alarm for a full decadeno battery replacements, no late-night low-battery chirps, and no ladder climbing
Photoelectric Smoke Sensor and Electrochemical CO Sensor: Responds faster to slow-smoldering fires, helps reduce cooking-related false alarms, and reliably detects dangerous carbon monoxide
Simple Installation: No rewiring required; easily mount this smoke and carbon monoxide alarm on a wall or ceiling using the included mounting bracket, screws, and anchor plugs
Meets UL 217 & UL 2034 Safety Standards: Independently tested and certified to meet UL 217 and UL 2034 standards for smoke and carbon monoxide detection; clear certification markings help support safety checks and code-compliant installation

View Deal on:

Main Highlights

Please Note: The SC07 is a basic standalone unit. It does not support wireless interconnection, Wi-Fi, or base station connection; for wireless interconnection, search for SC07-W
10-Year Protection, Zero Maintenance: A built-in sealed lithium battery powers the alarm for a full decadeno battery replacements, no late-night low-battery chirps, and no ladder climbing
Photoelectric Smoke Sensor and Electrochemical CO Sensor: Responds faster to slow-smoldering fires, helps reduce cooking-related false alarms, and reliably detects dangerous carbon monoxide
Simple Installation: No rewiring required; easily mount this smoke and carbon monoxide alarm on a wall or ceiling using the included mounting bracket, screws, and anchor plugs
Meets UL 217 & UL 2034 Safety Standards: Independently tested and certified to meet UL 217 and UL 2034 standards for smoke and carbon monoxide detection; clear certification markings help support safety checks and code-compliant installation

4

9.2

Excellent

X-Sense Smoke Detector and Carbon Monoxide Detector, SC01, 1-Pack

X-Sense

X-Sense Smoke Detector and Carbon Monoxide Detector, SC01, 1-Pack

Main Highlights

Please Note: SC01 is a basic standalone unit; it does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for interconnection, search for SC01-W
10-Year Sealed Battery (Not AC Hardwired): Contains a long-life lithium battery that powers the device for its entire 10-year life
2-in-1 Protection: This combination detector protects your family against two dangers-both smoke and carbon monoxide
Simple Installation: Requires no rewiring; easy to mount this fire and CO alarm on any wall or ceiling with the included mounting bracket, screws and anchor plugs
Loud 85 dB Alarm: Upgraded photoelectric and electrochemical sensors significantly increase the sensitivity of the alarm for a faster response time while minimizing false alarms

View Deal on:

Main Highlights

Please Note: SC01 is a basic standalone unit; it does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for interconnection, search for SC01-W
10-Year Sealed Battery (Not AC Hardwired): Contains a long-life lithium battery that powers the device for its entire 10-year life
2-in-1 Protection: This combination detector protects your family against two dangers-both smoke and carbon monoxide
Simple Installation: Requires no rewiring; easy to mount this fire and CO alarm on any wall or ceiling with the included mounting bracket, screws and anchor plugs
Loud 85 dB Alarm: Upgraded photoelectric and electrochemical sensors significantly increase the sensitivity of the alarm for a faster response time while minimizing false alarms

5

9.0

Excellent

X-Sense Smoke Detector Carbon Monoxide Alarm Combo, XP0H-SN, 1-Pack

X-Sense

X-Sense Smoke Detector Carbon Monoxide Alarm Combo, XP0H-SN, 1-Pack

Main Highlights

Please Note: The XP0H-SN is a basic standalone unit; does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for an interconnected version, search for XP0H-WN
2-in-1 Protection, One Simple Solution: This combination alarm features built-in sensors for both smoke and carbon monoxide, delivering reliable 24/7 protectionall in one compact device; tested and certified to meet UL 217 and UL 2034 safety standards
10-Year Sealed Lithium Battery: The long-life battery and reliable performance offer peace of mind without the hassle of battery changes, knowing your home is protected for a decade
Large Mounting Bracket for a Clean Finish: Our extra-large 5.7-inch (145 mm) bracket covers more area than standard small ones, easily hiding old screw holes and ceiling stains from previous alarms; installation looks neat with no need for patching (Note: Please check that your existing device fits within this size before installation.)
Built-in Self-Test: Automatically checks the sensors, electronics, and battery every 60 seconds to ensure the device is working properly and keeping your home and family safe
Easy-to-Read LCD: See real-time CO levels and battery life at a glance; the LCD screen stays off during standby and only lights up when theres an alarm or testso it keeps you informed without disturbing your sleep

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Main Highlights

Please Note: The XP0H-SN is a basic standalone unit; does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for an interconnected version, search for XP0H-WN
2-in-1 Protection, One Simple Solution: This combination alarm features built-in sensors for both smoke and carbon monoxide, delivering reliable 24/7 protectionall in one compact device; tested and certified to meet UL 217 and UL 2034 safety standards
10-Year Sealed Lithium Battery: The long-life battery and reliable performance offer peace of mind without the hassle of battery changes, knowing your home is protected for a decade
Large Mounting Bracket for a Clean Finish: Our extra-large 5.7-inch (145 mm) bracket covers more area than standard small ones, easily hiding old screw holes and ceiling stains from previous alarms; installation looks neat with no need for patching (Note: Please check that your existing device fits within this size before installation.)
Built-in Self-Test: Automatically checks the sensors, electronics, and battery every 60 seconds to ensure the device is working properly and keeping your home and family safe
Easy-to-Read LCD: See real-time CO levels and battery life at a glance; the LCD screen stays off during standby and only lights up when theres an alarm or testso it keeps you informed without disturbing your sleep

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6

8.8

Very Good

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

First Alert

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
End-of-life warning lets you know when its time to replace the alarm

View Deal on:

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
End-of-life warning lets you know when its time to replace the alarm

7

8.6

Very Good

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

First Alert

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
End-of-life warning lets you know when its time to replace the alarm
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly

View Deal on:

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
End-of-life warning lets you know when its time to replace the alarm
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly

8

8.3

Very Good

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

First Alert

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
End-of-life warning lets you know when its time to replace the alarm

View Deal on:

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
End-of-life warning lets you know when its time to replace the alarm

9

8.1

Very Good

First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm

First Alert

First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm

Main Highlights

BRK's Precision Detection advanced sensing technology reduces cooking nuisance alarms and delivers early warning
Interconnects with most First Alert and BRK alarms so when one sounds, all compatible alarms sound to provide an early warning
Battery backup provides continuous protection during power outages
Perfect mount bracket keeps the alarm secure over a wide rotation range for ideal alignment and easy installation
Latching Alarm Indicator visually identifies the unit that initiated the alarm or low battery warning

View Deal on:

Main Highlights

BRK's Precision Detection advanced sensing technology reduces cooking nuisance alarms and delivers early warning
Interconnects with most First Alert and BRK alarms so when one sounds, all compatible alarms sound to provide an early warning
Battery backup provides continuous protection during power outages
Perfect mount bracket keeps the alarm secure over a wide rotation range for ideal alignment and easy installation
Latching Alarm Indicator visually identifies the unit that initiated the alarm or low battery warning

10

8.1

Very Good

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

First Alert

First Alert Battery Combination Smoke & Carbon Monoxide Alarm

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
End-of-life warning lets you know when its time to replace the alarm
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly

View Deal on:

Main Highlights

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Provides reliable 2-in-1 protection against both smoke and carbon monoxide
End-of-life warning lets you know when its time to replace the alarm
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly