10 Best Smart Smoke Detector 2025 in the United States

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector is designed to provide comprehensive safety for your home. Its main strength lies in the interconnected feature; when one unit detects smoke or CO, all interconnected units will alarm, ensuring that you are alerted promptly no matter where you are in the house. With the ability to connect up to 24 devices, this system can effectively cover larger spaces, making it a great choice for families living in bigger homes.

The smoke detector uses advanced detection technology, combining photoelectric and electrochemical sensors, which enhances its reliability in detecting both smoke and harmful CO levels. The informative LCD display is another plus, showing real-time CO levels and battery status, keeping you informed about the unit’s functionality.

On the practical side, the built-in 10-year battery is a significant advantage, removing the hassle of battery replacements during the lifespan of the unit. Installation is straightforward, as they are screw-in models and lightweight, weighing only 300 grams each.

However, this model does not support Wi-Fi, which may limit smart home integration for users looking for more advanced features such as remote monitoring via smartphone apps. If Wi-Fi connectivity is a priority for you, you would need to consider the alternative model, SC07-WX. Additionally, while the coverage per detector is decent, it is recommended for spaces up to 215-430 sq. ft., so you'll need to ensure adequate placement throughout your home for maximum protection.

The First Alert Smoke Alarm SMI100-AC 3-Pack is designed to provide reliable fire detection with a focus on reducing false alarms from cooking using its Precision Detection technology. This ionization sensor-based detector offers early warning to help keep your home safe. One strong point is its interconnect feature, which ensures that when one alarm sounds, all compatible units in your home will activate, giving you a clear and widespread alert.

The battery backup is another plus, providing continuous protection even during power outages, so you don’t have to worry about losing your smoke alarm’s functionality. Installation is made easier with the included Quick Connect Plug, which means you can set it up without rewiring your home’s electrical system. However, it's worth noting that these alarms do not offer Wi-Fi or app connectivity, so they lack remote alerts or smart home integration that some other smoke detectors have.

The unit uses standard 9V alkaline batteries, which are included, but they will need regular replacement to keep the alarm working optimally. Maintenance is relatively straightforward, especially with the visual alarm indicator that shows which alarm was triggered. This 3-pack is a solid choice for anyone wanting dependable, wired smoke alarms with battery backup and simple installation, especially if you prefer straightforward devices without the need for smartphone controls or complex smart features.

The X-Sense Smoke and Carbon Monoxide Detector Combo offers reliable 2-in-1 protection by combining smoke and carbon monoxide detection in one device. It uses photoelectric and electrochemical sensors, which are effective for detecting smoke and CO respectively, making it a good choice for family safety. One of its biggest strengths is the wireless interconnection feature allowing up to 24 alarms to link together. This means if one alarm detects danger, all connected alarms will sound, providing better home coverage.

It does not support Wi-Fi, so you won’t get smart home app notifications or remote alerts, which might be a drawback if you want advanced smart features. The device is powered by a sealed 10-year lithium battery, meaning you won’t need to worry about changing batteries often, which adds convenience and reduces maintenance. Installation is straightforward since it’s battery-powered and wireless, though linking multiple alarms requires understanding the RF interconnection process.

The detectors are made from heat-resistant, durable materials, ensuring long-term reliability. This product suits those looking for dependable, easy-to-install smoke and CO protection with excellent inter-device communication but without the complexity or cost of full smart home integration.