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Smoke & CO Detectors · Head to head

X-Sense Wi-Fi Carbon Monoxide Alarm vs X-Sense Wi-Fi Smoke Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official X-Sense site.
2026 verdict
Same brand and app, two different hazards, and the X-Sense Wi-Fi Carbon Monoxide Alarm comes out ahead on its LCD with live readings and its stronger owner reception.
X-Sense Wi-Fi Carbon Monoxide Alarm
Winner
X-Sense Wi-Fi Carbon Monoxide Alarm
€39.99

Last recorded price

Buy on Amazon Italy
It watches for carbon monoxide and shows the level on screen, so you can see a reading rising instead of just hearing an alarm. The X-Sense Wi-Fi Smoke Alarm wins on battery life, with its CR123A cell rated for 10 years against 1 year, in a small 78 mm puck. Both connect to 2.4 GHz Wi-Fi with phone alerts, work with Home Assistant but not Google Home, Alexa or Apple Home, and carry a 5 year warranty. Most homes with fuel-burning appliances need one of each: pick the X-Sense Wi-Fi Carbon Monoxide Alarm near a gas boiler, stove or wood burner, and the X-Sense Wi-Fi Smoke Alarm on ceilings for fire warnings.
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FeatureX-Sense Wi-Fi Carbon Monoxide AlarmX-Sense Wi-Fi Smoke AlarmWinner
Price€39.99€24.06X-Sense Wi-Fi Smoke Alarm
Rating4.64.5X-Sense Wi-Fi Carbon Monoxide Alarm
Battery Life1 year10 yearsX-Sense Wi-Fi Smoke Alarm
ScreenYESNOX-Sense Wi-Fi Carbon Monoxide Alarm
Warranty5 years5 yearsTie
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
IntegrationsHome AssistantHome AssistantTie
SensorsCOSmokeTie
AlertsCO Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Built-in LightYESYESTie
Tests ItselfNONOTie

What the differences mean

What it detects

The X-Sense Wi-Fi Carbon Monoxide Alarm senses CO only and the X-Sense Wi-Fi Smoke Alarm senses smoke only. They do not substitute for each other: one warns of a gas leak from a fuel-burning appliance, the other of a fire.

Screen

The CO alarm has an LCD that shows the current carbon monoxide level, useful to see whether a reading is climbing. The smoke alarm has no screen.

Battery life

Both use a CR123A cell, rated for 10 years in the X-Sense Wi-Fi Smoke Alarm and 1 year in the X-Sense Wi-Fi Carbon Monoxide Alarm, so the CO alarm needs a yearly battery change.

Placement

The smoke alarm is a 78 mm puck for the ceiling. The CO alarm is a slim 135 x 63 x 24 mm unit that can stand on a shelf near the appliance it watches.

Which one to buy if

What owners say

Owners of both X-Sense alarms say the same things about setup: join 2.4 GHz Wi-Fi through the app and be running within minutes, with a loud siren, phone alerts while away and a replaceable battery. Both groups also mention app text that is not translated for every market. X-Sense Wi-Fi Carbon Monoxide Alarm owners, typically with gas boilers or stoves, single out the LCD with a live CO reading and a freestanding design that needs no mounting, and note that push alerts can lag a little behind the screen. X-Sense Wi-Fi Smoke Alarm owners praise a solid build and mention that there is no automatic self-test, so they still press the test button themselves.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • X-Sense Wi-Fi Carbon Monoxide Alarm
  • X-Sense Wi-Fi Smoke Alarm

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Frequently Asked Questions

Which is better overall: X-Sense Wi-Fi Carbon Monoxide Alarm or X-Sense Wi-Fi Smoke Alarm?

The X-Sense Wi-Fi Carbon Monoxide Alarm edges it on its live LCD reading, but they protect against different hazards. The X-Sense Wi-Fi Smoke Alarm is the one for fire, and has a much longer rated battery life.

Does the X-Sense Wi-Fi Smoke Alarm detect carbon monoxide?

No. The X-Sense Wi-Fi Smoke Alarm detects smoke only. For carbon monoxide you need the X-Sense Wi-Fi Carbon Monoxide Alarm or a combination smoke and CO alarm.

Does X-Sense work with Google Home?

Not these two. Neither the X-Sense Wi-Fi Carbon Monoxide Alarm nor the X-Sense Wi-Fi Smoke Alarm works with Google Home, Alexa or Apple Home. Both send alerts through the X-Sense app over Wi-Fi and work with Home Assistant.

Do the X-Sense Wi-Fi Carbon Monoxide Alarm and the X-Sense Wi-Fi Smoke Alarm need a hub?

No. Both connect directly to 2.4 GHz Wi-Fi and push alerts to your phone through the X-Sense app.

Who should buy the X-Sense Wi-Fi Carbon Monoxide Alarm?

Homes with fuel-burning appliances that want a CO alarm with a live reading on screen and phone alerts.

Who should buy the X-Sense Wi-Fi Smoke Alarm?

Anyone who needs Wi-Fi smoke alerts on the ceiling from a small alarm whose battery is rated for 10 years.

Full comparison table

Compare all 25 Smoke & CO Detectors side by side

You are looking at two of them. The full table lines up all Smoke & CO Detectors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

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  • 44 specs compared
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