Winner
Data from Amazon and official First Alert and X-Sense sites.
2026 verdict
In this 2026 First Alert SC5 Battery Smart Smoke & CO Alarm vs X-Sense Wi-Fi Carbon Monoxide Alarm comparison, First Alert SC5 Battery Smart Smoke & CO Alarm comes out ahead thanks to warranty, integrations, and sensors. Its clearest strengths are warranty, integrations, and sensors, and it still looks stronger on alerts and steam check. The only strong reason to choose X-Sense Wi-Fi Carbon Monoxide Alarm is if price, rating, and screen is more important to you than the overall verdict. That keeps the verdict firmly in favor of First Alert SC5 Battery Smart Smoke & CO Alarm.
| Feature | First Alert SC5 Battery Smart Smoke & CO Alarm | X-Sense Wi-Fi Carbon Monoxide Alarm | Winner |
|---|---|---|---|
| Price | $129.98 | €28.73 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Rating | 3.5 | 4.6 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Warranty | 10 years | 5 years | First Alert SC5 Battery Smart Smoke & CO Alarm |
| Integrations | Google Home | None | First Alert SC5 Battery Smart Smoke & CO Alarm |
| Screen | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Sensors | Smoke, CO | CO | First Alert SC5 Battery Smart Smoke & CO Alarm |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | First Alert SC5 Battery Smart Smoke & CO Alarm |
| Built-in Light | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Steam Check | YES | NO | First Alert SC5 Battery Smart Smoke & CO Alarm |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Built-in Siren | YES | YES | Tie |
| Tests Itself | NO | NO | Tie |
Winner
- + Warranty: 10 years
- + Integrations: Google Home
- + Sensors: Smoke, CO
- - Price: $129.98 vs €28.73
- - Rating: 3.5 vs 4.6
28% OFF
€28.73
€39.99
- + Price: €28.73
- + Rating: 4.6
- + Screen: YES
- - Warranty: 5 years vs 10 years
- - Integrations: None vs Google Home
Frequently Asked Questions (FAQ)
Which is better overall: First Alert SC5 Battery Smart Smoke & CO Alarm or X-Sense Wi-Fi Carbon Monoxide Alarm?
First Alert SC5 Battery Smart Smoke & CO Alarm has the stronger overall profile in this comparison, especially for warranty, integrations, and sensors.
What is the biggest difference between First Alert SC5 Battery Smart Smoke & CO Alarm and X-Sense Wi-Fi Carbon Monoxide Alarm?
Price is one of the clearest differences: First Alert SC5 Battery Smart Smoke & CO Alarm lists $129.98, while X-Sense Wi-Fi Carbon Monoxide Alarm lists €28.73.
Which one looks better on price?
First Alert SC5 Battery Smart Smoke & CO Alarm is listed at $129.98, while X-Sense Wi-Fi Carbon Monoxide Alarm is listed at €28.73. X-Sense Wi-Fi Carbon Monoxide Alarm (better spec).
Who should buy First Alert SC5 Battery Smart Smoke & CO Alarm?
Choose First Alert SC5 Battery Smart Smoke & CO Alarm if your priority is warranty and integrations and that matters more than price.
Who should buy X-Sense Wi-Fi Carbon Monoxide Alarm?
Choose X-Sense Wi-Fi Carbon Monoxide Alarm if your priority is price and rating and that matters more than warranty.
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