Winner
15% OFF
£26.00
£30.59
Updated October 2026
Data from the official X-Sense site.
2026 verdict
The built-in light and the stronger owner feedback tilt this CO alarm comparison to the X-Sense Wi-Fi Carbon Monoxide Alarm, with the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts winning on sensors.
Both are standalone 2.4 GHz Wi-Fi carbon monoxide alarms with no base station required, an LCD, a replaceable CR123A battery and a five-year warranty. What sets the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts apart is sensing and speech: it adds temperature and humidity readings and spoken alerts that name the alarm and its location. The X-Sense Wi-Fi Carbon Monoxide Alarm keeps it simpler, with a built-in light, a large LCD showing live CO levels and a freestanding design, and its Home Assistant integration is listed where the XC0M-iR's is not documented. Neither detects smoke or works with Alexa, Google Home, Apple HomeKit, SmartThings or Matter. Pick the X-Sense Wi-Fi Carbon Monoxide Alarm for a straightforward, light-equipped CO monitor, and the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts if you want climate readings and spoken alerts.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | X-Sense Wi-Fi Carbon Monoxide Alarm | X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts | Winner |
|---|---|---|---|
| Price | £26.00 | £27.71 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Rating | 4.6 | 4.4 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Sensors | CO | CO, Temperature, Humidity | X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts |
| Built-in Light | YES | NO | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Warranty | 5 years | 5 years | Tie |
| Battery Life | 1 year | 1 year | Tie |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Integrations | Home Assistant | None | Tie |
| Screen | YES | YES | Tie |
| Alerts | CO Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
| Tests Itself | NO | NO | Tie |
What the differences mean
Extra sensors
The X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts reads ambient temperature and humidity as well as carbon monoxide, and graphs both in the app. The X-Sense Wi-Fi Carbon Monoxide Alarm measures carbon monoxide alone.
Voice alerts
The X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts speaks its warnings, naming the alarm and its location, so a household knows which room to check. The X-Sense Wi-Fi Carbon Monoxide Alarm warns with a siren only.
Built-in light
The X-Sense Wi-Fi Carbon Monoxide Alarm includes a built-in light for local warning and visibility. The X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts has none, showing status through an LED indicator and its backlit LCD.
Display detail
Both use an LCD, but the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts scrolls the live CO reading, temperature and humidity and stores the peak CO level, while the X-Sense Wi-Fi Carbon Monoxide Alarm shows the CO concentration on its own.
Home Assistant
Home Assistant support is listed for the X-Sense Wi-Fi Carbon Monoxide Alarm. For the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts it is not documented, which matters if you plan to automate the alarm.
Which one to buy if
- you want carbon monoxide, temperature and humidity on one device
The X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts adds temperature and humidity sensing alongside its CO cell.
- you prefer spoken alerts over a beeping siren
The XC0M-iR announces the alarm and its location aloud, while the X-Sense Wi-Fi Carbon Monoxide Alarm only sounds a siren.
- you want a built-in light on the alarm
The X-Sense Wi-Fi Carbon Monoxide Alarm has a built-in light the XC0M-iR does not.
- you want the simpler and better reviewed CO monitor
The X-Sense Wi-Fi Carbon Monoxide Alarm keeps to CO coverage with a light and carries the stronger owner feedback of the pair.
Winner
15% OFF
£26.00
£30.59
- + Price: £26.00
- + Rating: 4.6
- + Built-in Light: YES
- - Sensors: CO vs CO, Temperature, Humidity
16% OFF
£27.71
£32.99
- + Sensors: CO, Temperature, Humidity
- - Price: £27.71 vs £26.00
- - Rating: 4.4 vs 4.6
What owners say
Owners of both X-Sense CO alarms describe an easy 2.4 GHz Wi-Fi setup through the X-Sense app, and both groups value push alerts on a phone and a replaceable battery. X-Sense Wi-Fi Carbon Monoxide Alarm owners praise the loud siren, the large LCD showing live CO levels and the freestanding design that needs no wall mounting, and several mention a fast warranty replacement; their complaints are that it offers no smart home integration, that the app is not localized everywhere and that notifications can lag the device. X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts owners single out the spoken alerts and the temperature and humidity readout, but warn that the climate history lags the live reading and that the small display is hard to read from an angle.
Frequently Asked Questions
Which is better overall: X-Sense Wi-Fi Carbon Monoxide Alarm or X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts?
The X-Sense Wi-Fi Carbon Monoxide Alarm, on its built-in light and stronger owner feedback, and it lists Home Assistant support. The X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts wins on sensors, adding temperature and humidity plus spoken alerts.
What is the biggest difference between the X-Sense Wi-Fi Carbon Monoxide Alarm and the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts?
Extra sensing and speech. The X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts adds temperature and humidity readings and spoken alerts that name the alarm and its location, while the X-Sense Wi-Fi Carbon Monoxide Alarm adds a built-in light and a simpler, single-purpose CO display.
Do these alarms detect smoke?
No. Neither the X-Sense Wi-Fi Carbon Monoxide Alarm nor the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts has a smoke sensor, so either should be paired with a separate smoke alarm.
Do both need a base station?
No. Both the X-Sense Wi-Fi Carbon Monoxide Alarm and the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts are standalone models that join 2.4 GHz Wi-Fi directly and need no X-Sense base station.
Who should buy the X-Sense Wi-Fi Carbon Monoxide Alarm?
Buyers who want a straightforward standalone Wi-Fi CO alarm with a built-in light and listed Home Assistant support.
Who should buy the X-Sense XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts?
Anyone who wants spoken CO alerts plus temperature and humidity readings from the same unit.
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