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

X-Sense Wi-Fi Carbon Monoxide Alarm

4.6
1,506 ratings
Launch Year: 2022

Model: XC04-WX

28% OFF
€39.99
€28.73
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Our review

X-Sense Wi-Fi CO Alarm Review: A Dedicated Carbon Monoxide Detector That Just Works

A freestanding, app-connected CO alarm with a clear LCD readout and real-time phone alerts, but no smoke detection and no smart home integrations.

The verdict

The X-Sense Wi-Fi CO Alarm is a dedicated carbon monoxide detector built for households with gas appliances, wood stoves, or boilers who want a phone alert if CO levels rise while they are away. Buyers consistently praise how quickly it connects to WiFi, how loud and clear its alarm is, and its self-standing design that needs no wall mounting. It is a single-purpose device though: it does not detect smoke and has no Google Home, Alexa, HomeKit, or other smart home integration, so anyone wanting a combined smoke and CO unit or voice assistant control should look elsewhere.

Best for
  • Homes with gas boilers or wood stoves
  • Rental and vacation properties
  • Buyers who want a standalone CO alarm
  • Anyone wanting real-time phone alerts while away

Pros

  • Fast WiFi and app setup
  • Loud, clearly audible built-in siren
  • Large LCD showing live CO readings
  • Freestanding design, no wall mounting required
  • Replaceable battery
  • 5-year warranty

Cons

  • No smoke detection or fire alerts
  • No smart home integrations (no Alexa, Google Home, HomeKit, Matter)
  • No automations support
  • App and instructions not localized for every market

Who is the X-Sense Wi-Fi CO Alarm for?

This alarm targets anyone whose home has a potential carbon monoxide source: gas boilers, wood-burning stoves, fireplaces, or attached garages. Reviewers describe buying it specifically for these situations, including one owner whose alarm caught a real gas leak from a new boiler and another whose device stayed reliable for years without false alerts. Its freestanding, tabletop-friendly design (it does not need to be wall mounted) also makes it popular for rental units and vacation homes where landlords or hosts want an extra layer of guest safety without any wall work.

What buyers love

Setup is the most repeated praise: reviewers describe connecting the alarm to 2.4GHz WiFi and the X-Sense Home Security app in just a few minutes, matching the item's simple app-pairing design. The built-in siren, rated loud and clearly audible from other rooms, comes up often, as does the large LCD screen that displays the live CO reading rather than just a pass/fail indicator. Several buyers highlight getting real-time push notifications on their phone when away from home, and more than one mentions the replaceable battery setup as a practical plus over a sealed, non-serviceable unit.

What to know before you buy

This is a CO-only alarm: it has no smoke sensor and no fire alerts, so it will not replace a smoke detector and should be paired with one if you need both types of protection. It also has no smart home integrations at all, no Google Home, Alexa, Apple HomeKit, Samsung SmartThings, or Matter, so it cannot be added to voice routines or third-party automations, unlike some connected smoke alarms. A couple of reviewers note the app and instructions are not localized into every buyer's language, though the setup is simple enough that this is a minor hurdle, and one noted that push notifications can lag slightly behind the live reading shown on the device.

Is the X-Sense Wi-Fi CO Alarm worth it?

Backed by a 5-year warranty and consistently strong buyer feedback, this alarm delivers on its single job: accurate, promptly-alerted carbon monoxide detection with the convenience of phone notifications. It is a good value pick for anyone who specifically needs standalone CO coverage and does not require smart home integrations, though shoppers wanting one alarm that handles both smoke and CO, or that plugs into a broader automation ecosystem, will want a different model.

Frequently asked questions

Does the X-Sense Wi-Fi CO Alarm also detect smoke?

No. It is a dedicated carbon monoxide alarm with no smoke sensor and no fire alerts, so it needs to be paired with a separate smoke alarm for full coverage.

Does it work with Alexa, Google Home, or Apple HomeKit?

No. It has no smart home integrations at all; it connects only to its own X-Sense app over 2.4GHz WiFi for alerts and history.

Does it need to be mounted on the wall?

No, it has a freestanding design so it can sit on a shelf or table, though it can also be wall mounted if preferred.

How will I know if the battery is running low?

The alarm sends low-battery alerts through the app, and it uses a replaceable CR123A battery rather than a sealed, non-serviceable cell.

Does the alarm show the actual CO level or just an alarm state?

It has a built-in LCD screen that displays the live carbon monoxide reading, letting you monitor levels rather than only seeing a pass/fail alert.

At a glance

Summary

Everything this smoke & co detector supports, grouped by category.

Size & Materials
5.3 × 2.5 × 0.9 in (135 × 63 × 24 mm)3 oz (85 g)
Connectivity
2.4 GHz WiFi
Display
LCD
Sensors
CO
Alerts
CO AlertsLow Battery Alerts
Features
Built-in SirenBuilt-in Light

Price History

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Company
X-Sense logo

X-Sense

4.5/ 5 avg ratingChina flagHeadquartered in China

X-Sense specializes in smart home safety devices, including interconnected smoke and carbon monoxide alarms, heat detectors and water leak sensors. Its alarms can link wirelessly and send alerts to a phone through the X-Sense base station and app. X-Sense focuses on reliable, connected home safety and early warning.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials

Dimensions

5.3 × 2.5 × 0.9 in (135 × 63 × 24 mm)

Weight

3 oz (85 g)

Power

Wired

NO

Battery Type

CR123A

Battery Life

?

Connectivity

2.4 GHz WiFi

YES

IEEE 802.11b/g/n

5 GHz WiFi

NO

Bluetooth

NO

Zigbee

NO

Z-Wave

NO

Thread Protocol

NO

Integrations

Google Home

NO

Alexa

NO

Apple HomeKit

NO

Samsung SmartThings

NO

Home Assistant

NO

IFTTT

NO

Matter

NO

Display

Screen

YES

Screen Type

LCD

The large LCD indicates how much carbon monoxide the alarm is detecting, ranging from 30 to 999 ppm.

Sensors

Smoke

NO

CO

YES

Occupancy

NO

Temperature

NO

Humidity

NO

Air Quality

NO

Ambient Light

NO

Motion

NO

Alerts

Fire Alerts

NO

CO Alerts

YES

Low Battery Alerts

YES

Temperature Alerts

NO

Air Quality Alerts

NO

Features

Built-in Siren

YES

Built-in Light

YES

Tests Itself

NO

Pathlight

NO

Steam Check

NO

Automations

NO

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