First Alert SC5 Battery Smart Smoke & CO Alarm vs First Alert SMCO410 Smoke Detector & CO Alarm

The First Alert SMCO410 Smoke Detector & CO Alarm takes a narrow overall edge as the more affordable unit, but the two are very closely matched. Both combine smoke and carbon monoxide sensing with steam-check, low-battery alerts, a 10-year warranty and a 10-year battery, so the decision mostly comes down to connectivity preference.

Connectivity is the biggest difference. The First Alert SMCO410 Smoke Detector & CO Alarm uses Z-Wave and works with Home Assistant and the Ring Base Station, while the First Alert SC5 Battery Smart Smoke & CO Alarm uses Wi-Fi and works with Google Home. Their sensors, alerts and warranties are otherwise nearly identical.

Yes. Both the First Alert SC5 Battery Smart Smoke & CO Alarm and the First Alert SMCO410 Smoke Detector & CO Alarm pair a photoelectric smoke sensor with an electrochemical carbon monoxide sensor, sending fire, CO and low-battery alerts, and both use steam-check to reduce nuisance alarms.

They match closely. Both the First Alert SC5 Battery Smart Smoke & CO Alarm and the First Alert SMCO410 Smoke Detector & CO Alarm carry a 10-year warranty and a 10-year battery rating, so neither holds an advantage on longevity.

Buy the First Alert SMCO410 Smoke Detector & CO Alarm if you want the more affordable of the two, or if your smart home runs on Z-Wave, Ring or Home Assistant, since it targets those ecosystems while keeping the same combined smoke-and-CO protection.

Buy the First Alert SC5 Battery Smart Smoke & CO Alarm if you prefer Wi-Fi connectivity and Google Home compatibility, and value its voice alerts that announce the type and location of danger, with the same 10-year warranty and dual smoke-and-CO sensing.