Head-to-head · Best Carbon Monoxide Detectors

Siterwell Wireless Interconnected Smoke & CO Alarm vs X-Sense SC07-WX Smart Smoke and CO Alarm

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

X-Sense SC07-WX Smart Smoke and CO Alarm is the only one of the two with a published score (4.2); Siterwell Wireless Interconnected Smoke & CO Alarm has none, so this is not a close call so much as an unmeasured one. X-Sense SC07-WX Smart Smoke and CO Alarm is best for: Renters and homeowners who want phone alerts for smoke and CO without hardwiring. Read the strengths below before deciding.

Ranked #5 in Best Carbon Monoxide Detectors

Siterwell Wireless Interconnected Smoke & CO Alarm

Unrated3 sources$41.99as of Oct 11

Siterwell's wireless interconnected smoke and CO alarm offers reliable 10-year battery life and wireless interconnected functionality for up to 18 devices. The Do Not Disturb mode provides relief from nighttime false alarms, while its compact design makes it suitable for various locations including Airbnbs and RVs. Consumer Reports noted its ease of installation and accurate electrochemical sensor. This makes it ideal for renters or those seeking affordable interconnected protection without hardwiring.

Strengths

— 10-year long-life lithium battery built-in
— Wireless interconnected capability connecting up to 18 devices
— Do Not Disturb mode silences alarms for up to 10 hours

Watch-outs

— potential mounting orientation issue

$41.99 · Check Price on Amazon Full review →

Higher ratedRanked #2 in Best Carbon Monoxide Detectors

X-Sense SC07-WX Smart Smoke and CO Alarm

4.2

1 source$36.54as of Oct 10

The X-Sense SC07-WX is a battery-powered combination smoke and carbon monoxide alarm with built-in Wi-Fi and a 1.2-inch LCD that shows the CO level in parts per million. PCMag rated it 4.0 out of 5, calling it reasonably priced and easy to install, with push and email alerts and optional professional monitoring with fire dispatch. PCMag's criticisms are that it does not work with Alexa, Apple HomeKit or Google Home, has no voice alerts, and cannot be interconnected with other alarms.

Strengths

— Reasonably priced for a Wi-Fi alarm, per PCMag
— LCD shows the CO level in ppm and the battery level
— Push and email alerts, with an in-app button to silence the alarm

Watch-outs

— Does not work with Alexa, Apple HomeKit or Google Home
— No voice alerts
— Standalone: cannot be interconnected with other alarms

$36.54 · Buy at x-sense.com Full review →

How they stack up

Siterwell Wireless Interconnected Smoke & CO Alarm

The Siterwell Wireless Interconnected Smoke & CO Alarm links wirelessly with up to 18 devices and runs on a built-in 10-year lithium battery, where the Kidde Smart Smoke + Carbon Monoxide Alarm is hardwired with battery backup and costs more. The X-Sense SC07-WX Smart Smoke and CO Alarm cannot be interconnected with other alarms, though it sends push and email alerts over Wi-Fi and costs less than the Siterwell.

X-Sense SC07-WX Smart Smoke and CO Alarm

Unlike the Kidde Smart Smoke + Carbon Monoxide Alarm, which is hardwired with battery backup and lists Amazon Alexa and Google Home connectivity, the SC07-WX runs on a single replaceable battery and, per PCMag, works with no smart home platform. It is a standalone unit, whereas the Siterwell Wireless Interconnected Smoke & CO Alarm links to other alarms. Its $36.54 price is well under the Kidde Smart alarm's $130.10.

Specs side-by-side

Spec	Siterwell Wireless Interconnected Smoke & CO Alarm	X-Sense SC07-WX Smart Smoke and CO Alarm
Power Source	Built-in 10-year lithium battery	One CR123A battery (included)
Battery Life	10-year lithium	—
Connectivity	Wireless interconnected	Wi-Fi (2.4GHz), Bluetooth
Alert Type	Loud alarm with flashing light	—
Installation	Easy Install	—
Detection Type	Smoke and carbon monoxide	Smoke and carbon monoxide
Alarm Volume	85 dB	85 dB
Sensor Type	Photoelectric smoke + electrochemical CO	Photoelectric smoke, electrochemical CO
Dimensions	3.3"D x 4.8"W x 1.7"H	5.7 x 5.7 x 2.0 in
Material	Plastic	—
Display	—	1.2-inch LCD (CO ppm, battery level)
Rated Life	—	10 years

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