The best Smoke and CO detectors, compared.
Top pick: X-Sense XP0A-SR Best value: AEGISLINK SC200 – Highest listing-and-price score that is not the top pick, on about £23.19 and 3,147 reviews. The listing prints no EN number. Updated October 2026.
A smoke and CO detector is one battery housing with a smoke sensor and a carbon monoxide sensor. It is not a smoke-only alarm, and it is not a kitchen heat alarm. Owner-occupiers in existing English homes often want one disc for a landing or a room that also has a boiler. Landlords, and owners in Scotland, have extra duties a single disc often cannot finish. Tell quality by whether both sensing methods are named, whether the battery is sealed for the life of the alarm or only replaceable, whether a real standard is cited, and whether the unit is standalone. How to choose is in the [smoke and CO detector buying guide](/hub/fire-protection/smoke-and-co-detector/sub/smoke-and-co-detector-buying-guide). Prefer a listing that names an optical or photoelectric smoke sensor and an electrochemical CO sensor. A dual-sensor line with no chemistry is weaker evidence. A sealed 10-year cell, as on the FireAngel SCB10-R and the X-Sense SC07, is a different product from a 10-year sensor with a replaceable cell.
A smoke and CO detector is one battery housing with a smoke sensor and a carbon monoxide sensor. It is not a smoke-only alarm, and it is not a kitchen heat alarm.
28 products checked · 64 hrs invested · +24,600 readers
Swipe for more
1-2 of 8
Personal buying guide
Question 1 of 2
What should the listing show?
The X-Sense XP0A-SR is a standalone talking combination alarm at £25.49, rated 4.7 from 352 amazon.co.uk reviews. The listing gives English lines for smoke and for carbon monoxide, plus an LCD, and it states no app and no interconnect. The cell is a replaceable CR123A claimed for up to 5 years, with a 10-year sensor life, and there is no EN number in the capture. Reviewers like the spoken smoke-versus-CO warning and the chance to change a cell instead of living with a sealed unit that will not silence. Battery life in the reviews is far shorter than five years: a late-November 2025 purchase fitted in April 2026 was dead by mid-August 2026, and another pair bought in May failed by the end of August, with cells dated March 2026. The twist lock has about half a turn of play, and several reviewers call the voice American rather than British. One reviewer mentions a cooking delay as useful.
Pros
Cons
Best for: You want a voice that names the hazard, and you will keep a spare CR123A in the drawer.
Less suitable: You need a sealed 10-year cell, a printed standard, or a five-year battery you can take from these reviews.
Specifications
Common questions
Does the XP0A-SR need a base station?
No. The listing says it does not support interconnectivity or an app. It is a standalone talking alarm.
How long does the battery last?
The listing claims a replaceable CR123A for up to 5 years. Campervan reviews include cells that died in a few months.
What does the voice say?
The listing gives English lines that name smoke and tell you to evacuate, and lines that name carbon monoxide and tell you to move to fresh air.
The AEGISLINK SC200 is the cheapest kept combination alarm in this capture, at £23.19, with 4.6 from 3,147 amazon.co.uk reviews. The bullets name a photoelectric smoke sensor and an electrochemical CO sensor, a screen that wakes for a test or an alarm reading, and a sound level over 85 dB at 3 m. The life claim is a 10-year sensor with a replaceable 3-year lithium cell, not a sealed pack. Reviewers like the twist plate and a loud one-button test, and one long-term note says the casing has not yellowed. The plate has only two fixing holes, so the LCD is hard to keep horizontal, and the replacement cell is an unusual size that buyers say they find mainly online. One of two units bought in 2023 later sounded for no reason even after a battery swap. The captured listing prints no EN 14604 or EN 50291 number, so the best-value mark here is the price and the review file, not a standards claim.
Pros
Cons
Best for: You want the lowest price in this set with a large review file, and you will check the standards yourself.
Less suitable: You need both EN numbers on the page, or a sealed cell you never open.
Specifications
Common questions
Does the SC200 print EN 14604 and EN 50291?
No. The captured listing has no standard number.
Is the battery sealed for ten years?
No. The listing claims a 10-year sensor life and a replaceable 3-year lithium cell. Reviews call the cell an unusual size.
How loud is the alarm?
The listing says over 85 dB at 3 m. Reviews call the test very loud.
The X-Sense SC07 is a sealed combination alarm at £27.71, rated 4.6 from 2,885 amazon.co.uk reviews. The listing claims a built-in 10-year lithium cell, a photoelectric smoke sensor, an electrochemical CO sensor, and both EN 14604 and EN 50291, with an LCD that shows carbon monoxide in ppm about every 10 seconds. Reviewers praise a loud test, a twist lock that can switch the unit on as you fit it, and use beside a wood burner or in a caravan. Dated reviews miss the 10-year claim: one unit manufactured on 18 March 2021 expired on 11 September 2026 with no low-battery warning, about five years, and another from around 2019 or 2020 failed early. The mounting-plate holes sit the disc about 15 degrees off level if you treat the holes as horizontal. Steam false alarms come up, and the listing says it will not work with the SBS50 hub. There is no Kitemark line in this capture, so the dual-standard wording is the seller’s claim.
Pros
Cons
Best for: You want a screen on a sealed standalone combo and you will accept a claimed EN line without a Kitemark.
Less suitable: You need a printed Kitemark, an SBS50 hub, or a cell you can change if it dies early.
Specifications
Common questions
Does the SC07 work with the X-Sense SBS50 hub?
No. The listing says it is not compatible with the SBS50 and has no interconnect or app.
Is the 10-year battery replaceable?
No. The listing claims a built-in 10-year lithium cell. Dated reviews include units that expired around five years.
Does it show carbon monoxide on a screen?
Yes. The LCD shows battery level and CO in ppm, updated every 10 seconds on the listing.
The X-Sense XP0A-MR is a Wi-Fi voice combination alarm at £35.99, rated 4.6 from 91 amazon.co.uk reviews, and the highlight says an SBS50 base station is required and not in the box. Reviewers who already own that hub describe a clear English voice that names smoke or carbon monoxide and the room, and they use the app when a garage or utility unit is too far to hear. Toast and shower-steam false alarms come up. One reviewer says only the person logged into the app gets notifications, two units keep dropping connection while the app still shows full signal, and one unit failed in about 18 months. Another review says the carbon monoxide reading stays at 0. The spec sensor line says carbon monoxide sensor while the bullets say smoke and CO, and the captured page has no EN number. An app alert on this model is not an interlink, and 91 reviews is a thin file next to the standalone X-Sense listings.
Pros
Cons
Best for: You already own an X-Sense SBS50 and want a talking combination alarm on that hub.
Less suitable: You are buying a first alarm, you need a printed standard, or you expected the base station in the box.
Specifications
Common questions
Do I need a base station?
Yes. The highlight says the SBS50 is required. It is not in the included line.
Is this a combination alarm?
The title and bullets name smoke and carbon monoxide. The spec sensor line only says carbon monoxide sensor.
Does it print EN 14604 and EN 50291?
No. The captured listing has no standard number. One reviewer was unsure this version meets all safety standards.
The Kitire Cosx2 4-pack is four standalone combination alarms at £33.29, rated 4.6 from 11 amazon.co.uk reviews. The listing claims an 85 dB siren, replaceable batteries, and no Wi-Fi, app, base station or wireless link, and its rank in the capture sits under Smoke Alarms. Ten UK texts describe compact units packed for cottages, hotels, caravans and short lets, with a clear test button and sturdy casings. There is no EN 14604 or EN 50291 line, and the four units do not talk to each other. One reviewer called four non-interlinked units silly expensive and quoted a shelf price other than £33.29. Some review titles mention a travel pack at a different price, so part of this small file may mix listings. The title names a kitchen, and these short reviews do not show that use. At about 5 × 7 × 5 cm and 690 g for the pack, this is a small spare set, not a sealed life-battery system.
Pros
Cons
Best for: You want several small standalone discs for temporary rooms and you accept an 11-review file.
Less suitable: You need standards on the page, interlinked alarms, or a sealed 10-year cell.
Specifications
Common questions
Are the four alarms interlinked?
No. The listing says the alarm is standalone and does not support Wi-Fi, an app, a base station or wireless interconnection.
Does the 4-pack print a British Standard?
No. The captured listing has no EN 14604 or EN 50291 line. Its Best Sellers rank is under Smoke Alarms.
How many reviews does it have?
11 ratings on the capture. Ten UK texts. Some review titles mention a different travel pack and a different price.
The FireAngel SCB10-R is a sealed combination alarm at £29.99, rated 4.4 from 1,372 amazon.co.uk reviews, and it is number 1 in Combination Smoke and Carbon Monoxide Detectors in this 19 October 2026 capture. Reviewers who fitted it describe a few-minute screw-and-click job, a compact disc, and different bleeps for smoke and carbon monoxide. The listing prints a Kitemark and BSI approval to EN 14604:2005+AC:2008 and EN 50291-1:2018, with an optical smoke sensor and an electrochemical CO sensor. The cell is sold as 10 years and is not replaceable, but the warranty is 3 years, and one reviewer reports a failure at 4 years and 5 months. A bright green flash about every 40 seconds led several buyers to take units down from bedrooms, hallways and campervans. One unit chirped after about a year with no obvious cause, and one reviewer rounded off the supplied screws. In this set it is the top pick when you want both standards printed on a sealed combo, and a poor bedroom choice if that standby flash will sit in your eyeline.
Pros
Cons
Best for: You want a standalone sealed combo that prints both EN numbers and a Kitemark, and you can site it away from a dark bedroom.
Less suitable: A bedroom or campervan bunk where the green flash will show, or a kitchen or garage.
Specifications
Common questions
Does the SCB10-R meet both smoke and CO standards?
The listing states CE and UKCA, a Kitemark, and BSI approval to EN 14604:2005+AC:2008 and EN 50291-1:2018.
Can you change the battery?
No. The battery is sealed for a claimed 10-year life. End of life is two chirps and an amber LED twice every 40 seconds.
Does it flash in standby?
Reviews describe a bright green flash about every 40 seconds. Several buyers took the upstairs unit down for bedrooms and campervans.
The Kitire cosx2 1-pack is a standalone combination alarm at £25.99, rated 4.2 from 48 amazon.co.uk reviews, with an LCD and an 85 dB siren and no standard number in the capture. The colour field says 1pack, but the UK texts also describe a twin pack and match the 2-pack ASIN, so those 48 ratings are a shared pool. Reviewers who like it mention an easy bracket, batteries in the box, a loud test, and replaceable AA cells. The siren runs about 25 seconds when the batteries first go in. The title names a garage, and one reviewer found a garage ban in the instructions. The wall bracket is called weak in one garage review, and one review says the unit did not work. One buyer was surprised by a 60 to 90 minute carbon monoxide delay at 50 ppm. At about 5 × 7 × 4 cm it is a small disc whose listing does not print EN 14604 or EN 50291.
Pros
Cons
Best for: You want a cheap standalone LCD combo and you will treat the shared reviews and the missing standard line as limits.
Less suitable: You need a Kitemark, a sealed cell, or a garage alarm the instructions actually allow.
Specifications
Common questions
Does this listing print EN 14604 or EN 50291?
No. The captured bullets have no standard number.
Can I put it in a garage?
The title names a garage. One reviewer found a garage ban in the instructions.
Are the reviews for the 1-pack?
The listing has 48 ratings. The captured UK texts also describe a twin pack and match the 2-pack ASIN.
The Kitire cos-x2 2-pack is listed at £45.99 with 4.2 from 48 amazon.co.uk reviews, the same star line as the 1-pack, and the captured UK review blocks read as the same pool. The title and colour field say two packs, while the Number of Items field prints 1. Reviews describe two units, an LCD, a loud test, a bracket and plugs, and 3 × AA cells in each. The captured page has no EN 14604 or EN 50291 number, and the listing says the units are standalone with no interconnection or app. The siren runs about 25 seconds when the batteries first go in, the bracket is called weak, and one review is a unit that did not work. The title names a garage, and a reviewer found a garage ban in the instructions. At £45.99 this is the dearest listing in the set, for two replaceable-battery discs that do not print a standard.
Pros
Cons
Best for: You have checked that two units will actually arrive, and you only need uncertified standalone discs.
Less suitable: You want a sealed Kitemarked alarm, or a 2-pack whose item count matches the title.
Specifications
Common questions
Is this definitely a two-pack?
The title and colour field say 2 packs. The Number of Items field prints 1. Reviews describe two units and 3 × AA each.
Does it print EN 14604 or EN 50291?
No. The captured listing has no standard number.
Do the two units talk to each other?
No. The listing says standalone with no interconnection or app. Reviews repeat that.
Eight amazon.co.uk combination listings were scored on 19 October 2026 from stars, review count, combo fit, and shelf price. This is not a laboratory test. A high star line on a smoke-only alarm does not win, and those files were left out before this page. The four weights below are the point maxima in the scoring note, and they sum to 100.
Amazon stars
30%Maximum 30. The amazon.co.uk star rating divided by 5, then times 30, rounded to the nearest whole number. A 4.2 line scores 25. A 4.4 line scores 26. A 4.6 or 4.7 line scores 28.
Review sample
25%Maximum 25. 5,000 or more reviews scores 25, 1,000 or more scores 22, 700 or more scores 20, 300 or more scores 16, 200 or more scores 14, and under 100 scores 8. The listing count is used.
Combo fit
30%Maximum 30 for both EN 14604 and EN 50291, a Kitemark, and a sealed cell. Both EN numbers claimed, sealed, with no Kitemark, scores 24. A combination with an LCD or a voice and no standard line scores 12. A combination that needs a base station and prints no standard scores 10. A kitchen or garage title clash with no standard scores 8.
Listing and price
15%Maximum 15 for the cheapest kept combo with a large sample. A named dual-standard sealed unit around £28 to £30 scores 12. A voice standalone around £25 scores 10. A shared-review 1-pack scores 8. A Wi-Fi unit that needs a hub not in the box scores 6. A pack whose item count or kitchen title clashes scores 5.
A smoke and CO detector is one housing for both hazards. Match the sensors, the battery, and the nation before you match the price. The eight prices below are the amazon.co.uk shelves on 19 October 2026, from about £23.19 to about £45.99. Nothing here is a mains Grade D2 system, and no lab test was run.
A smoke and CO detector here is one battery housing with a smoke sensor and a carbon monoxide sensor, sold on amazon.co.uk for UK homes. It is not a smoke-only alarm and not a kitchen heat alarm. Prefer a listing that names an optical or photoelectric smoke sensor and an electrochemical CO sensor. A dual-sensor line with no chemistry is weaker evidence. A sealed 10-year cell, as on the FireAngel SCB10-R and the X-Sense SC07, is a different product from a 10-year sensor with a replaceable cell.
England still wants a smoke alarm on each living storey, and a CO alarm in the room with the appliance. One landing combination alarm is not the CO alarm for a boiler in another room. Scotland and Northern Ireland also want interlinked smoke alarms and a kitchen heat alarm.
The FireAngel SCB10-R sells a sealed 10-year cell and a 3-year warranty. The AEGISLINK SC200 splits a 10-year sensor from a replaceable 3-year lithium cell. The X-Sense voice units split a 10-year sensor from a CR123A claimed for up to 5 years. Dated SC07 reviews expired around five years.
These optical and photoelectric combination alarms do not belong over a hob or beside a bathroom. Kitire titles name a kitchen or a garage, and a reviewer found a garage ban in the instructions. A kitchen needs a heat alarm. A Wi-Fi alert on the XP0A-MR is not an interlink.
Prefer a listing that says optical or photoelectric smoke plus an electrochemical CO sensor. The FireAngel SCB10-R listing prints a Kitemark and BSI approval to EN 14604:2005+AC:2008 and EN 50291-1:2018. The X-Sense SC07 listing names both EN 14604 and EN 50291, with no Kitemark in the capture, so that dual-standard line is the seller’s claim. The AEGISLINK SC200, the X-Sense XP0A-SR, the X-Sense XP0A-MR, and the three Kitire listings print no EN number in this capture.
A sealed 10-year cell on the FireAngel SCB10-R and the X-Sense SC07 is a different product from a 10-year sensor with a shorter replaceable cell. The SC200 claims a 10-year sensor and a replaceable 3-year lithium cell that reviewers call an unusual size. The XP0A-SR and XP0A-MR claim a replaceable CR123A for up to 5 years. Reviews on the XP0A-SR include cells that died within months. The FireAngel warranty is 3 years, not the 10-year cell.
Three typical situations, each with a recommendation from this comparison.
You want one standalone alarm that prints a Kitemark and both EN 14604 and EN 50291, with a sealed cell. The FireAngel SCB10-R is about £29.99, score 90, with 4.4 from 1,372 reviews. Site it away from a dark bedroom. The green flash is about every 40 seconds, and the warranty is 3 years.
You want the cheapest kept combination alarm and a review file you can read, and you will check the standards yourself. The AEGISLINK SC200 is about £23.19, with 4.6 from 3,147 reviews. The captured listing prints no EN number. The cell is a replaceable 3-year lithium battery, not a sealed pack.
You want carbon monoxide in ppm on a sealed standalone unit, and you will accept a claimed EN line without a Kitemark. The X-Sense SC07 is about £27.71, score 86, with 4.6 from 2,885 reviews. It will not work with the SBS50 hub. Dated reviews include units that expired around five years.
The top pick is the FireAngel SCB10-R, score 90, at about £29.99. The listing prints a Kitemark and both EN 14604 and EN 50291 on a sealed cell, with 4.4 from 1,372 reviews. The green flash and a 3-year warranty hold it back for a dark bedroom. The best value is the AEGISLINK SC200, score 77, at about £23.19, with 4.6 from 3,147 reviews. That award is the shelf price and the review file. The captured listing prints no EN number, and the cell is replaceable. Neither result is a lab test, and one disc does not finish the duties in every UK nation.
AEGISLINK SC200
Highest listing-and-price score that is not the top pick, on about £23.19 and 3,147 reviews. The listing prints no EN number.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
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.
This page contains affiliate links to amazon.co.uk with the tag pcuk26-21. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars, and review counts are the UK listing lines from 19 October 2026. We did not run a lab test.
