Winner
Updated November 2026
Data from the official Heiman and X-Sense sites.
2026 verdict
In this 2026 Heiman Interconnected Smoke Alarm S1-R vs X-Sense Wi-Fi Carbon Monoxide Alarm comparison, Heiman Interconnected Smoke Alarm S1-R comes out ahead thanks to battery life, connectivity, and integrations.
The comparison tilts its way because of battery life, connectivity, and integrations, with tests itself and steam check keeping it in front. X-Sense Wi-Fi Carbon Monoxide Alarm is the better fit only for buyers who prioritize rating, screen, and Built-in light above everything else here. For most setups, Heiman Interconnected Smoke Alarm S1-R is the smarter buy.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Heiman Interconnected Smoke Alarm S1-R | X-Sense Wi-Fi Carbon Monoxide Alarm | Winner |
|---|---|---|---|
| Rating | 4.2 | 4.6 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Battery Life | 8.3 years | 1 year | Heiman Interconnected Smoke Alarm S1-R |
| Connectivity | 2.4 GHz WiFi, Other | 2.4 GHz WiFi | Heiman Interconnected Smoke Alarm S1-R |
| Integrations | Google Home, Samsung SmartThings, Home Assistant | Home Assistant | Heiman Interconnected Smoke Alarm S1-R |
| Screen | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Built-in Light | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Tests Itself | YES | NO | Heiman Interconnected Smoke Alarm S1-R |
| Steam Check | YES | NO | Heiman Interconnected Smoke Alarm S1-R |
| Sensors | Smoke | CO | Tie |
| Alerts | Fire Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
Winner
Price unavailable right now
- + Battery Life: 8.3 years
- + Connectivity: 2.4 GHz WiFi, Other
- + Integrations: Google Home, Samsung SmartThings, Home Assistant
- - Rating: 4.2 vs 4.6
- - Screen: NO vs YES
£35.99
- + Rating: 4.6
- + Screen: YES
- + Built-in Light: YES
- - Battery Life: 1 year vs 8.3 years
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Other
Frequently Asked Questions
Which is better overall: Heiman Interconnected Smoke Alarm S1-R or X-Sense Wi-Fi Carbon Monoxide Alarm?
Heiman Interconnected Smoke Alarm S1-R has the stronger overall profile in this comparison, especially for battery life, connectivity, and integrations.
What is the biggest difference between Heiman Interconnected Smoke Alarm S1-R and X-Sense Wi-Fi Carbon Monoxide Alarm?
Rating is one of the clearest differences: Heiman Interconnected Smoke Alarm S1-R lists 4.2, while X-Sense Wi-Fi Carbon Monoxide Alarm lists 4.6.
Who should buy Heiman Interconnected Smoke Alarm S1-R?
Choose Heiman Interconnected Smoke Alarm S1-R if your priority is battery life and connectivity and that matters more than rating.
Who should buy X-Sense Wi-Fi Carbon Monoxide Alarm?
Choose X-Sense Wi-Fi Carbon Monoxide Alarm if your priority is rating and screen and that matters more than battery life.
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Compare all 28 Smoke & CO Detectors side by side
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- 28 Smoke & CO Detectors
- 45 specs compared
- 42 filters
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Matter Smoke Detector S1-TM
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Smoke Alarm HM-636PHS
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Smoke and CO Alarm HM-636THS
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SD19-MN Interconnected Smart Smoke Alarm
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Wi-Fi Smoke Alarm
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XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
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STH0B Smart Thermometer Hygrometer
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2-in-1 Wi-Fi Water Leak & Freeze Detector
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Wi-Fi Water Leak Detector