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Smoke & CO Detectors · Head to head

X-Sense Wi-Fi Carbon Monoxide Alarm vs X-Sense WiFi Smoke & CO Detector

Full Smart Smoke & CO Detectors comparison in 2026

Updated October 2026
Data from Amazon and official X-Sense site.
2026 verdict
CO-only or smoke and CO in one unit? The X-Sense WiFi Smoke & CO Detector wins because it adds smoke detection and fire alerts to the carbon monoxide sensing both share.
X-Sense WiFi Smoke & CO Detector
Winner
X-Sense WiFi Smoke & CO Detector
€33.58€39.9916% OFF
Buy on Amazon GermanyCheck price
Everything else is close to identical: an LCD with readings, 2.4 GHz Wi-Fi with phone alerts, Home Assistant support and no Google Home, Alexa or Apple Home, a CR123A cell rated for 1 year and a 5 year warranty. The X-Sense Wi-Fi Carbon Monoxide Alarm is the slimmer device, 24 mm thick and able to stand on a shelf or counter, which suits a spot beside a boiler or stove where a ceiling alarm does not belong. Pick the X-Sense WiFi Smoke & CO Detector when one ceiling unit has to cover both hazards, and the X-Sense Wi-Fi Carbon Monoxide Alarm to add CO coverage next to smoke alarms you already have.
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FeatureX-Sense Wi-Fi Carbon Monoxide AlarmX-Sense WiFi Smoke & CO DetectorWinner
Price€39.87€33.58X-Sense WiFi Smoke & CO Detector
Rating4.64.5X-Sense Wi-Fi Carbon Monoxide Alarm
SensorsCOSmoke, COX-Sense WiFi Smoke & CO Detector
AlertsCO Alerts, Low Battery AlertsFire Alerts, CO Alerts, Low Battery AlertsX-Sense WiFi Smoke & CO Detector
Warranty5 years5 yearsTie
Battery Life1 year1 yearTie
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
IntegrationsHome AssistantHome AssistantTie
ScreenYESYESTie
Built-in SirenYESYESTie
Built-in LightYESYESTie
Tests ItselfNONOTie

What the differences mean

Smoke detection

The X-Sense WiFi Smoke & CO Detector detects smoke and sends fire alerts as well as CO. The X-Sense Wi-Fi Carbon Monoxide Alarm senses carbon monoxide only and does not replace a smoke alarm.

Shape and placement

The X-Sense Wi-Fi Carbon Monoxide Alarm is a slim 135 x 63 x 24 mm unit that can stand freely near a boiler or stove. The Smoke & CO Detector is a 144 mm round ceiling alarm, since smoke detection needs to sit high.

Battery

Both run on a CR123A cell rated for about 1 year, so battery upkeep is the same on either.

Which one to buy if

What owners say

Owners of both X-Sense alarms praise setup over Wi-Fi in a few minutes, a loud siren and an LCD that shows the actual reading rather than a simple status light. X-Sense Wi-Fi Carbon Monoxide Alarm owners, many with gas boilers or wood stoves, single out phone alerts while they are away, a freestanding design that needs no wall mounting and a replaceable battery; their small complaints are an app and instructions not translated for every market and push alerts that lag slightly behind the screen. X-Sense WiFi Smoke & CO Detector owners value covering smoke and CO from one ceiling spot and fast warranty replacements when a unit failed, and they note that it is bigger than a regular smoke alarm, that its bracket is tricky to level and that there is no automatic self-test.

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 WiFi Smoke & CO Detector

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Frequently Asked Questions

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

The X-Sense WiFi Smoke & CO Detector, because it detects smoke as well as carbon monoxide. The X-Sense Wi-Fi Carbon Monoxide Alarm is the better fit only when you already have smoke alarms and need CO coverage.

What is the difference between the X-Sense Wi-Fi Carbon Monoxide Alarm and the X-Sense WiFi Smoke & CO Detector?

The X-Sense WiFi Smoke & CO Detector adds a smoke sensor and fire alerts. The X-Sense Wi-Fi Carbon Monoxide Alarm senses CO only, in a slimmer freestanding case.

Do both X-Sense alarms have a screen?

Yes. The X-Sense Wi-Fi Carbon Monoxide Alarm and the X-Sense WiFi Smoke & CO Detector both have an LCD, and both send phone alerts over 2.4 GHz Wi-Fi.

Do the X-Sense Wi-Fi Carbon Monoxide Alarm and the X-Sense WiFi Smoke & CO Detector work with Google Home?

No. Neither works with Google Home, Alexa, Apple Home or Matter. Both work with Home Assistant and send alerts through the X-Sense app.

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

Homes that already have smoke alarms and want to add CO monitoring near a gas boiler, stove or wood burner, with a live reading and phone alerts.

Who should buy the X-Sense WiFi Smoke & CO Detector?

Anyone who wants smoke and carbon monoxide covered by one Wi-Fi connected ceiling alarm, with a 5 year warranty.

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.

  • 25 Smoke & CO Detectors
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