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Ensuring the safety of your home and loved ones is paramount. Smoke and carbon monoxide alarms are essential devices that provide early warnings of dangerous conditions, giving you crucial time to react. Choosing the right combination alarm can offer comprehensive protection against two of the most significant household threats.
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 it’s 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
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 decade—no 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
2-in-1 DETECTION: Model 30CUDR detects both smoke and carbon monoxide and features advanced sensing technology with over 25% faster smoke detection*; sounds a loud 85-decibel alarm with red LED light for clear visual warnings; suitable for homes
AA BATTERY OPERATION & WARRANTY: Powered by two AA batteries (included) for easy, no-wiring setup . Backed by 10-year limited warranty** that starts from date of purchase
REDUCED FALSE ALARMS: Uses advanced sensing technology that helps distinguish between real smoke and everyday cooking or steam; helps reduce false alarms while maintaining quick, accurate detection when smoke is present
TESTED FOR RELIABILITY & COMPLIANCE: Rigorously tested to meet UL 217 10th Edition, UL 2034 5th Edition, and FCC standards for performance and safety; enhanced sensing technology helps reduce false alarms from everyday cooking or steam
BUILT FOR HOMEOWNERS AND PROFESSIONALS: Designed for those who prioritize dependable, code-compliant detection; supports safety goals for homeowners, property managers, contractors, and professionals seeking long-term home safety assurance
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 it’s time to replace the alarm
First Alerts 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
Through early warning interconnect, when one alarm sounds, all compatible
Quick Connect Plug allows for easy installation with no need to rewire
Battery backup provides continuous protection during power outages
Test/silence button for efficient testing to ensure alarm is working properly
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 decade—no 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
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.
10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
End-of-life warning lets you know when it’s time to replace the alarm
Provides reliable 2-in-1 protection against both smoke and carbon monoxide in an easy to install alarm
Test/silence button for efficient testing to ensure alarm is working properly
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 it’s time to replace the alarm
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
Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Smoke & Carbon Monoxide Alarms
Types of Alarms
When selecting a smoke and carbon monoxide alarm, you'll encounter a few main types. Combination alarms detect both smoke and carbon monoxide in a single unit, offering convenience and space-saving. Interconnected alarms communicate with each other wirelessly or via a hardwired system. If one alarm detects a hazard, all connected alarms will sound, providing a more robust warning system throughout the home.
Power Sources
Alarms are typically powered by either a battery backup or a hardwired connection to your home's electrical system. Battery-powered units are easier to install but require regular battery changes. Hardwired alarms offer continuous power and often include a battery backup for power outages, though they require professional installation or electrical knowledge. Some newer models feature sealed, long-life batteries that can last up to 10 years, eliminating the need for frequent replacements.
Sensor Technology
Different sensor technologies are used to detect smoke and carbon monoxide. Photoelectric sensors are generally better at detecting slow-burning, smoldering fires that produce a lot of smoke but little flame. Ionization sensors are more responsive to fast-flaming fires. Many modern combination alarms utilize dual-sensor technology, combining both photoelectric and ionization sensors for broader detection capabilities. For carbon monoxide detection, electrochemical sensors are the standard, accurately measuring CO levels.
Smart Features and Connectivity
Advanced models offer smart features, including Wi-Fi connectivity. These alarms can send alerts to your smartphone or tablet, notifying you of an emergency even when you're away from home. Some also integrate with smart home systems, allowing for automated actions like turning on lights or unlocking doors in the event of an alarm. Voice alerts, which announce the type and location of the danger, can also help pinpoint the source of the threat more quickly.
Frequently Asked Questions
How often should I test my smoke and CO alarms?
It's recommended to test your smoke and carbon monoxide alarms at least once a month. Press the test button on each unit to ensure the alarm sounds correctly. This simple test confirms that the sensors, batteries, and electronics are functioning as expected.
Where is the best place to install smoke and CO alarms?
Install alarms on every level of your home, including inside and outside sleeping areas. For combination alarms, place them in central locations within hallways, living areas, and near bedrooms. Avoid placing them too close to kitchens or bathrooms where false alarms might occur.
How long do smoke and CO alarms typically last?
Most smoke and carbon monoxide alarms have a lifespan of about 10 years. After this period, their effectiveness can diminish, and they should be replaced. Check the manufacturer's date of manufacture or expiry date on the back of the unit.
What's the difference between photoelectric and ionization sensors?
Photoelectric sensors are better at detecting slow, smoldering fires, while ionization sensors are more effective against fast-flaming fires. Combination alarms often use both sensor types to provide comprehensive detection for various fire types.
Do I need separate alarms for smoke and carbon monoxide?
You do not necessarily need separate alarms. Combination alarms are designed to detect both smoke and carbon monoxide in a single unit, offering a convenient and effective solution for home safety. They provide dual protection with just one device.
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