10 Best Smoke Detector Carbon Monoxide Detectors Combo 2025 in the United States

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector offers a comprehensive safety solution for your home. Equipped with both a photoelectric smoke sensor and an electrochemical CO sensor, it ensures reliable detection of both smoke and carbon monoxide. This 6-pack model allows you to interconnect up to 24 devices, ensuring that when one alarm goes off, all of them do, providing extensive coverage and early warnings throughout your home.

One standout feature is the built-in 10-year lithium battery, which means you don't have to worry about replacing batteries for a decade. Additionally, the LCD display is very informative, showing real-time CO levels, battery status, and working status, which helps in maintaining the device easily. However, it's important to note that while these detectors support wireless interconnection, they do not have Wi-Fi capabilities. If you need Wi-Fi, you would want to look for a different model, specifically the SC07-WX. The alarms are battery-powered, which makes installation straightforward without the need for hardwiring.

The detectors are made from heat-resistant PC plastic, making them durable and reliable. If you're looking for a combination smoke and CO detector that ensures extensive coverage, long battery life, and ease of use, the X-Sense SC07-W is a solid choice.

The First Alert SMICO100-AC is a combination smoke and carbon monoxide detector that offers robust safety features and user convenience. It uses ionization sensor technology, which is effective in detecting fast-flaming fires commonly found in home environments. The hardwired power source with a battery backup ensures continuous protection even during power outages. This model is designed for easy installation with its Quick Connect Plug, eliminating the need for rewiring, which is ideal for those who prefer straightforward setups.

One of its standout features is its interconnectivity capability, meaning when one alarm triggers, all connected alarms will sound, providing comprehensive coverage throughout your home. This can be a crucial feature for larger homes or multi-story buildings. The test/silence button allows for regular testing and easy silencing of nuisance alarms, which is helpful for maintaining the device without much hassle. Durability is another aspect, as it complies with new industry standards aimed at reducing false alarms during cooking, which is a common issue with older models.

However, the unit uses an ionization sensor, which is less effective in detecting smoldering fires compared to photoelectric sensors. The hardwired installation might be a drawback for those without existing wiring setups or who prefer battery-only models. This product is best suited for homeowners looking for a dependable, easy-to-install, and interconnected alarm system for enhanced safety.

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector (SC06-W, 6-Pack) offers a robust solution for home safety. Its dual protection with photoelectric smoke and electrochemical CO sensors ensures comprehensive hazard detection. The standout feature is its wireless interconnectivity, allowing all alarms to sound simultaneously if one is triggered, which can significantly enhance safety throughout a home.

It’s important to note that this device doesn’t support Wi-Fi, which limits remote monitoring capabilities. The 10-year sealed battery is a strong point, offering a long-term power solution without the need for frequent battery changes, though it will give a low battery warning towards the end of its lifespan. The inclusion of a test/silence button is a practical touch, making it easy to check functionality or silence alarms if needed.

This model supports full home coverage by linking up to 24 units, ensuring extensive protection. Since it’s battery-powered, there may be concerns about battery disposal, and the lack of Wi-Fi means users can’t receive alerts on their phones. This detector is ideal for users seeking a reliable, interconnected alarm system with long battery life, but it may not suit those looking for smart home integration features.