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X-Sense smoke and carbon monoxide alarm

Updated: 21 October 2026

A fuel-burning appliance in one room is a different problem from a hall that only needs smoke. An X-Sense smoke and carbon monoxide alarm puts a photoelectric smoke sensor and an electrochemical carbon monoxide sensor in one ceiling unit, and that unit still only covers the room it sits in. On amazon.co.uk, in the listings captured on 19 October 2026, three models do that job: the sealed SC07, the Wi-Fi SC07-WX, and the XP0A-MR that needs an SBS50. There was no lab test. A qualifying purchase can earn us a commission at no extra cost to you. Smoke-only heads stay on the [X-Sense smoke detector comparison](/hub/fire-protection/x-sense-smoke-detector). Landlord duties stay on the [buying guide](/hub/fire-protection/x-sense-smoke-detector/sub/x-sense-smoke-detector-buying-guide).

A fuel-burning appliance in one room is a different problem from a hall that only needs smoke.

Our top picks

X-Sense X-Sense SC07

Best overall

X-Sense X-Sense SC07
8.0/10about £27.71
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X-Sense X-Sense XP0A-MR

Alternative

X-Sense X-Sense XP0A-MR
7.7/10about £35.99
View offer
X-Sense X-Sense SC07-WX

Alternative

X-Sense X-Sense SC07-WX
7.8/10about £45.99
View offer
On this page
  1. 1.What one combined head does, and where it stops
  2. 2.SC07: one room, no phone
  3. 3.SC07-WX: a phone for one room, not a linked house
  4. 4.XP0A-MR: spoken rooms, once the base exists

What one combined head does, and where it stops

The useful part is one disc for two hazards in the same room: smoke from a fire, and carbon monoxide from a faulty appliance. The SC07 listing claims EN 14604 and EN 50291, with CO in ppm on an LCD. It does not replace a smoke alarm on every storey, or a heat alarm in the kitchen. If anyone in the house has symptoms that might be carbon monoxide, leave and call 999. In Great Britain the gas emergency number is 0800 111 999. An app history of ppm is not that call.

SC07: one room, no phone

The SC07 is listed at about £27.71 with 4.6 from 2,885 reviews. The cell is a sealed 10-year lithium unit. The listing says it is not compatible with the SBS50 and has no interlink and no app. UK reviews include a cell that expired at about five years and a unit that rang in a clear room at 0 ppm after 13 months. That is a pattern in the file, not a rate. Choose the SC07 when the room needs both sensors and a phone is not part of the brief. Skip it if the landing must sound. You replace the whole alarm when a sealed cell is dead.
X-Sense X-Sense SC07

Testsieger

X-Sense X-Sense SC07
8.0/10about £27.71
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SC07-WX: a phone for one room, not a linked house

The SC07-WX is listed at about £45.99 with 4.4 from 2,304 reviews. It joins the X-Sense Home Security app on 2.4 GHz without an SBS50. The listing says it does not interlink and does not support 5 GHz. Carbon monoxide history sits in the app, with a warning when the level exceeds 100 ppm. The replaceable batteries are stated at up to one year, and one CR123A is in the box. No EN number is printed in this capture. A push notification is not a siren in the rest of the house. Use the SC07-WX when you will replace the CR123A and you want a record for one room. Use the SC07 when you would rather keep a sealed head.

XP0A-MR: spoken rooms, once the base exists

The XP0A-MR is listed at about £35.99 with 4.6 from 91 reviews. The highlight says the wireless alarm requires the SBS50, and the box has no base. The listing gives English examples for smoke and for carbon monoxide, including the room name, then evacuate or move to fresh air. The replaceable CR123A is stated at up to five years, but the included-components line does not name a cell. No EN number is printed in this capture. Buy it when an SBS50 is already in the plan and you want a spoken room name. Do not buy it as a first alarm for a bedsit. The standalone versus SBS50 page is that architecture choice.

Common questions

Does the XP0A-MR include the base station?
No. The listing says the wireless alarm requires the SBS50, and the included line is the alarm, a bracket, two screws, two plugs and a manual. Voice prompts and the app exist through that base. At about £35.99 you have bought a head, not the hub. The FS31 at about £63.99 is a smoke-only kit that does include an SBS50, and it does not include this combination sensor. Budget for the base before you treat the XP0A-MR as a system.
Can a combination alarm replace separate smoke and carbon monoxide units?
In the one room where it is fitted, the SC07 is sold as both sensors in one body. It does not cover the hall, the landing and a second appliance room. You still want a smoke alarm on each level, which is the Fire Kills pattern, and a heat alarm rather than this smoke sensor in the kitchen. A combination head also does not interlink the house. If two storeys must hear each other, this is the wrong single purchase.
Is the SC07-WX interlinked with other X-Sense heads?
The listing says it is not. It joins the app on its own 2.4 GHz connection and is not compatible with the SBS50. A notification on your phone does not make an SD11 on the landing sound. If linked horns are the requirement, look at an SBS50 kit or the Link+ HS21, and keep this head for a room where the record of ppm is the extra you are paying for. 5 GHz Wi-Fi will not run it.
Where should I fit a smoke and carbon monoxide alarm?
Fit it in the room with the fuel-burning appliance, on the ceiling, and not in the kitchen if the smoke sensor will see cooking vapour. Screws and plugs are in the SC07 box. Follow the manual for clearance from walls, because this capture does not print a millimetre figure. Test the button monthly until the horn sounds. The LCD on the SC07 shows CO in ppm on the listing's description. That display is a check, not a reason to stay in the room if you feel unwell.
Do I still need carbon monoxide alarms in other rooms?
Yes, where another room has its own fuel-burning appliance. One head reports the air at its own sensor. A closed door between a boiler cupboard and a bedroom is enough to make a single disc a poor proxy for the whole house. The GOV.UK landlord booklet frames a carbon monoxide duty around solid fuel, and this comparison does not invent how many alarms that duty becomes in your let. Owner-occupiers still have the practical problem of one sensor, one room.

Related pages

Best X-Sense smoke detector

X-sense smoke detector

X-Sense smoke alarm buying guide: nation and family

How to fit an X-Sense smoke alarm and test it monthly

X-Sense SBS50 base station or standalone smoke alarm

Sources

Public UK sources from the research digest, last checked on 19 October 2026. Prices, stars, and review counts are the amazon.co.uk lines captured that day.

  1. GOV.UK — Smoke and carbon monoxide alarms, landlord booklet (retrieved 19 October 2026)
  2. Scottish Government — fire and smoke alarms, where and what to buy (retrieved 19 October 2026)
  3. Scottish Fire and Rescue Service — smoke and heat alarms (retrieved 19 October 2026)
  4. legislation.gov.uk — Wales, WSI 2022/6 (retrieved 19 October 2026)
  5. Northern Ireland Department for Communities — smoke, heat and carbon monoxide alarms (retrieved 19 October 2026)
  6. London Fire Brigade — smoke alarms and heat alarms (retrieved 19 October 2026)
  7. Fire Kills — detect (retrieved 19 October 2026)
  8. X-Sense SD11 user manual (retrieved 19 October 2026)