Kidde 5CO Ten Year Life LED Carbon Monoxide Detecto


Kidde 5CO - Banner Image5CO - Angled View5CO - Loud Alarm and Flashing Light5CO - Tamper Proof Design

Loud alarm and flashing light

The detector raise a very loud alarm (85dB) and flashes an LED light when dangerous carbon monoxide levels are detected to notify you of the dangerous gas.

Slim and stylish

The alarm measures 72x126x35mm (HxWxD) and only stands 35mm off the wall. It features an elegant and timeless design.

Tamper proof design

The alarm can only be installed with the two AA alkaline batteries in place. The batteries are supplied with the alarm.

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Replaceable Battery ✓ ✓
Longlife lithium battery ✓ ✓
CO detection ✓ ✓ ✓ ✓
Smoke detection ✓
Voice warning ✓
Wall mounted ✓ ✓ ✓
Ceiling mounted ✓
Digital Display ✓


Weight: 115 g
Size: Alarm Dimensions 126 x 72 x 35mm
Dimensions: 12.6 x 3.5 x 7.2 cm; 115 Grams
Part: 5CO
Colour: White
Batteries Required: Yes
Batteries Included: Alkaline
Manufacture: Kidde
Colour: White
Dimensions: 12.6 x 3.5 x 7.2 cm; 115 Grams
Reference: 5CO
Size: Alarm Dimensions 126 x 72 x 35mm

228 Responses

  1. Chris Morris says:

     United Kingdom

    Really no idea what to say here..?! Aren’t going to install it, as it’s for my folding camper with gas hob. If I wake up dead. I’ll know it really didn’t work.

  2. EloiseAppleton says:

     United Kingdom

    When it arrived i fitted in minutes and it’s easy to set and test good produc

  3. Anonymous says:

     United Kingdom

    Just pull the protective film from the battery, and it is ready for the next 10 years, just wish my PC was as easy

  4. Erika Thomas says:

     United Kingdom

    Gave it 5 stars as I just assume it works. Purchased before our gas inspection as the gas man had mentioned on his previous 2 visits that we should invest in such an alarm. He liked it and his approval put us at ease.

  5. Anonymous says:

     United Kingdom

    Easy to install, good price I guess but first one I’ve bought for my daughter’s bedroom as she has the boiler on that room. Followed instructions. I haven’t put it on the wall, it’s in the airing cupboard with the boiler sitting on a shelf.

  6. Anonymous says:

     United Kingdom

    Use this as a portable detector in my Campervan. So far so good. Easy to use and decent quality

  7. Anonymous says:

     United Kingdom

    It’s a good product & it’s value for money. The instructions are easy to follow & it’s easy to install. My old one broke down but this is much better & as a bonus it looks better too.

  8. BridgetPRV says:

     United Kingdom

    Golden Review Award: 2 From Our UsersThis is the second one of these that I have purchased and they are absolutely brilliant. My carbon monoxide alarm went off twice this year due to a faulty boiler and if I didn’t have this alarm I would have been in trouble!! If you don’t have one in your home I strongly suggest you get one. Better to be safe and these are relatively cheap to be fair.

  9. Anonymous says:

     United Kingdom

    Easy installation and clear instructions, although without a carbon monoxide leak it’s hard to fully rate but the audio test soun should wake the dead

  10. KobyDelgadillo says:

     United Kingdom

    Value for money. Hard to review as you never know how good this product is until it’s called into use

  11. Pete Larson says:

     United Kingdom

    Bought this for our caravan. Worth every penny. Very easy to install and test. Good battery life.

  12. Anonymous says:

     United Kingdom

    This is a great and also a necessary item to use in conjunction with the small gas heater we use in our campervan. A+++++

  13. MindaGoodchild says:

     United Kingdom

    Bought this for safety. Works well and easy to attach to the wall. Great little alarm

  14. Anonymous says:

     United Kingdom

    Obviously I hope I never find out whether this will work properly, but item arrived quickly.

  15. Anonymous says:

     United Kingdom

    Works a treat easy to install and it monitors 24/7 green light flashes every 30 seconds a must if you have a log burner or an old boile

  16. Anonymous says:

     United Kingdom

    Popular brand/model that’s easy to fit but take notice of the placement instructions. Not ‘tested’ it as (hopefully) we don’t have a CO issue. Useful to have but no substitute for regular appliance maintenance.

  17. Anonymous says:

     United Kingdom

    Bought this for my summerhouse as I got a galore gas fire In it just bought it to make sure that when we use the fire that there are no harmful fumes

  18. Anonymous says:

     United Kingdom

    Flexible fast to set up product. Bought on recommendation of smart meter fitter due to gas use. Need to write the date on it as they say throw away after 10 years and replace.

  19. Anonymous says:

     United Kingdom

    Needed a new detector to check if leakage of carbon monoxide.This seemed to be a good quality good value monitor.Hopefully apart from the initial test we won’t have a leak but nice to know it will warn us

  20. LeonaBRKJku says:

     United Kingdom

    This item arrived well packaged and on time. Placed in the house to give the protection I was looking for. Well pleased, good purchase..

  21. IsolouGadson says:

     United Kingdom

    Arrived next day and does what it says. I’ve used this brand before and had no issues. Good value compared to popular high street store asking 9 more for exactly the same product.

  22. Anonymous says:

     United Kingdom

    Easy to fit, screws included in the box. It arrived as advertised, and works.

  23. Anonymous says:

     United Kingdom

    When installing this it tells you to check that it works before putting it up. It scared the living daylights out of me, my husband, and my dog and woke up the baby who was in the other room – so it works extremely well and I have every faith it would easily wake us all up in the dead of night if it needed to.

  24. James Hercher says:

     United Kingdom

    Ordered on the 26th April and arrived today (27th) thanks to Amazon Prime.
    Partner is happy that we now have a detector at home – better to be safe than sorry; CO is a “silent killer”.
    Happy with the 7 year Warranty and 10-year life – didn’t expect the batteries to last that long! Requires x3 AA sized but it’s not a problem replacing them for the price of the device.
    The green, ‘Operate’ light flashes every 30 seconds to show that the unit is working (rather than being on constantly – not a problem when you know what to expect).
    Happy with the purchase and peace of mind that it offers. Would recommend.

  25. GiseleGauthier says:

     United Kingdom

    Great product, fitting instructions were clear and helpful.

    Careful, when your put the batteries in, it goes off to test. Jumped out my skin.

  26. The Browser says:

     United Kingdom

    Golden Review Award: 2 From Our UsersIt’s odd being asked to rate this. Like the last one I had, I fitted the batteries, checked the alarm worked, and that the green ‘on’ light was flashing, and that was all I could do, really. I’ll only find out if it’s really working properly if the CO levels rise – which I hope they don’t. And, until I find out if it’s working as it should, I can’t really say if it’s value for money or not!

  27. Elliott3593 says:

     United Kingdom

    Seems ok. Set up easy to do. Very loud alarm. Think we had this one in the past. Good price too and comes with batteries

  28. Sara Coughlin says:

     United Kingdom

    This is a well priced, easy to install carbon monoxide alarm. Fast delivery, and is working well. Highly recommended for the quality of the product.

  29. Anonymous says:

     United Kingdom

    This is the second time that I bought this product. It’s very good but I just should point out that Kidde have reduced the usable life of the product to 7 years. Its not 10 years as stated in the product informatio

  30. FlynnTolley says:

     United Kingdom

    Excellent device, neat and tidy to look at,. It lasts for a very long time on one set of batteries. Also very economical to purchase.

  31. JocelynStapleto says:

     United Kingdom

    Excellent product, very easy to set up. Small and compact, due existing alarm bleeping fault, needed asap amazon did not disappoi

  32. johnstewart says:

     United Kingdom

    prompt delivery . An inconspicuous and neat monitor which can free stand and is therefore moveable . Fortunately the alarm has not sounded so I can’t comment on efficacy but I can say it is very loud from the initial set up !

  33. FrankieO02 says:

     United Kingdom

    I feel so much safer with having this in the house. It’s easy to install and it also comes with batteries so you can use straight away. It’s not very bulky so it looks neat and tidy in the house, came the next day after ordering. It can be put op the wall or just placed on a shelf like I’ve done

  34. Anonymous says:

     United Kingdom

    I dont know why it didn’t occur to me to buy one sooner. Every home should have at least one. This device is value for money easy to use and easy to check weekly that the battery does not need changing. It is good to know it will save lives, hopefully it won’t be needed but goid to know it’s there. Money well spent.

  35. Anonymous says:

     United Kingdom

    Good quality.
    Gas Board said it’s a very good one when they came to service boile

  36. Anonymous says:

     United Kingdom

    This product can be fitted anywhere that there is a possibilty of carbon monoxide. Battery operated so no need to be near a power socket. Simple to fit and operate.

  37. Anonymous says:

     United Kingdom

    Fast delivery & looks exactly like the images, so a good start. Batteries included so a bonus which were easy to install. I’m unable to test it as we don’t have any fumes leaking, so I have to assume it does. Pressing the test button emits a very loud shrill tone.

  38. FawnW05iwu says:

     United Kingdom

    This is my second purchase as really happy with the first one. It can be wall mounted or free standing. Neat and with a good guarantee. Perfect to place close tot he gas boiler in the utility room. Arrived swiftly.

  39. JerrodBiehl says:

     United Kingdom

    Bought to replace an almost identical one that had gone out of date. Don’t see the need for anything fancy but it’s loud when tested and presumably works fine as it’s a trusted brand and has all the right certifications

  40. Rosie Vare says:

     United Kingdom

    Brilliant we just had our apartment evacuated… inside and out ….leaks
    Brilliant product.
    for a Life saving product the cost is excelle

  41. LLB staff reporter says:

     United Kingdom

    Good price for a necessary life saving device. Excellent, fast, the same day delivery option. Thank you.

  42. Anonymous says:

     United Kingdom

    This is just great! I was advised by British Gas I needed a second carbon monoxide detector in the bathroom owing to the boiler; prices varied but this baby was an excellent price and after reading the reviews went with it and it’s great and VERY LOUD! Would highly recommend.

  43. LenardHannaford says:

     United Kingdom

    Liked the fact that all you had to do was put in a battery and ready to use. Not digital but replaced a similar one which was past its sell by. Simple and does the job

  44. VictoriUwu says:

     United Kingdom

    This was easy to install and easy to use. It comes with instruction booklet which also has information about how to look for the signs of carbon monoxide poisoning and the different stages.
    There is also a warning sticker which tells you what to do if your alarm sounds a warning there is carbon monoxide being leaked.
    It tells you what to do and who to call.

  45. Anonymous says:

     United Kingdom

    Compact so it’s not seen on top of my unit.
    Value for money but there again you can’t put a price on something that can save your life.
    It’s battery operated so no
    Wiring

  46. Anonymous says:

     United Kingdom

    Seems fine. Good loud signal. Frequent flashing light to show still active. Otherwise time will tell

  47. DamonQyqykdxbb says:

     United Kingdom

    Golden Review Award: 2 From Our UsersAmazon recommends I use ‘sheerness’ & ‘thickness’.
    Either they think ive bought something a bit more adult or I don’t know anything about this item.

    As far as I’m concerned, it’s a carbon monoxide dectector, sits on our window sill as we have a coal fire. Easy to get up and running, it’s just happily flashing every 30secs to show its working.
    Does exactly what it says on the tin. As the old advert used to say.

  48. Victoria says:

     United Kingdom

    Arrived quickly, as described at a good price. I hope it never needs to go off !

  49. XQURachael says:

     United Kingdom

    It didn’t turn up had to get intuch with them, but they did send a new 1

  50. Anonymous says:

     United Kingdom

    Came early and just what we needed, good size and easy to put up

  51. KathaleRaymond says:

     United Kingdom

    I feel safe , knowing any carbon monoxide will be detected.

  52. ShannanGonzalez says:

     United Kingdom

    It looks good, we are never sure if it works until we have a leak. Hopefully neve

  53. Anonymous says:

     United Kingdom

    Very easy to fit looks good dont even know it’s there. Let’s hope it never goes off

  54. JaunitaWheat says:

     United Kingdom

    Easy to install and assemble and Sits well on the mantlepiece without having to attach it to a wall. The detector emits a very loud noise when activated and provides you with a sense of security.

  55. CharissaGMJA says:

     United Kingdom

    Good replacement for expired carbon monoxide detector. I have used this brand before and I like to use the same brand if possible – well worth the money

  56. Anonymous says:

     United Kingdom

    I bought two of these alarms, one for the kitchen, as we have a gas cooker, and one for the lounge, as we have a gas fire. Kidde do sell LED digital ones as well, but I chose these for simplicity. The instructions are easy to follow and the alarms are very easy to set up. I would recommend these alarms.

  57. Anonymous says:

     United Kingdom

    Does exactly what it says. Delivery was brilliant – came before expected date. Very pleased with price.

  58. Paul says:

     United Kingdom

    Golden Review Award: 2 From Our UsersWhat did I use it for? That’s a stupid question; you don’t use a CO detector to mix cocktails.
    It is a bit fiddly to get batteries located because of the springs ( a little force may be needed to push home in locations)
    I had to run the initial test twice in order to get the green light flashing every 30 – had to do that the first one I bought. A good machine.

  59. Anonymous says:

     United Kingdom

    Perfect – Quick Delivery and came with batteries and wall hangings. Perfect. The test function seems to be working ok. I cant vouch for the alarm working unless we have a carbon monoxide leak however I have had this brand of alarms for years and never let me down. 100% trust them. Thank you

  60. Anonymous says:

     United Kingdom

    Looks good and gives me reassurance that I can sleep safe at night.

  61. Jermaine6261 says:

     United Kingdom

    Was bought as a replacement for out of date one
    Replaced like for like

  62. Alexandra Able says:

     United Kingdom

    Appears solid, and works when testing. Apart from that I won’t know if it works until there is a leak

  63. Anonymous says:

     United Kingdom

    A quality product that is easy to set up and gives peace of mind. Ten years of reassurance from Kidde. Seller dispatched very quickly and I am happy to recommend both them and the product.

  64. Henry Miller says:

     United Kingdom

    Just had a new boiler installed so thought it prudent to get a carbon monoxide detector as well, in order to keep safe

  65. LucindaBMYE says:

     United Kingdom

    we purchased this as a replacement for one that was now out of date.It is the same one that we have had for many years so were pleased with this purchase came on time well packed easy to install. would recomend .

  66. Anonymous says:

     United Kingdom

    These are good, we have them in our static caravan, a little fiddly to put batteries in to start with, but fine after tha

  67. FelicitasCortez says:

     United Kingdom

    Quick delivery. Item as described. Value for money. Would recommend seller and item. Thanks.

  68. Steven Petite says:

     United Kingdom

    Bought these to replace a different make that turned out not to be reliable.. these kidde ones are reliable and what is needed to safeguard and protect.

  69. Anonymous says:

     United Kingdom

    Excellent quality product followed up by super customer service. Recommended.

  70. Under the Covers Book Blog says:

     United Kingdom

    Have always bought this make. And from experience can certainly tells you it works. Great value for money.

  71. Anonymous says:

     United Kingdom

    Easy to use and set up . Green flashing intermittent light lets you know it’s working

  72. Oscar Gonzalez says:

     United Kingdom

    Exactly as described. Arrived on time. Looks neat. I have mine standing but comes with screws to install on wall.

  73. CathyNeace says:

     United Kingdom

    Arrived extremely quickly from the seller. Easy to put together and test. I just need someone to mount it on the wall for me now.

  74. Anonymous says:

     United Kingdom

    simple to use , have it up above my fire place on top of a large mirror ,good price for peace of mind

  75. PenelopFKP says:

     United Kingdom

    Golden Review Award: 2 From Our UsersA very decent detector at a more than reasonable price. So good I bought it twice! Put the batteries in, and away you go! It can be mounted onto a wall or other surface, but I have just placed mine on level surfaces near to my fireplace and next to my boiler. Easy peasy!

    Great value.

  76. Danny van Leeuwen says:

     United Kingdom

    This is the second one I have bought the last one lasted 7years

  77. Anonymous says:

     United Kingdom

    This is a simple device without ‘bells and whistles’ but it does the job!

  78. HarryMakinson says:

     United Kingdom

    Fitted in exactly the same way as the redundant old one

  79. UVSShannon says:

     United Kingdom

    Bought to replace one I have had for a number of years. Simple, easy, reassuring.

  80. Anonymous says:

     United Kingdom

    I’ve been meaning to get one for ages, as I have a gas fire and a gas boiler. I will be buying another one soon to position near the boiler.

  81. DottySpeer says:

     United Kingdom

    Golden Review Award: 23 From Our UsersSimple to install. Can be mounted if needed (fixings supplied). Comes with 3 AA Batteries, so only need to replace those when the time comes for up to 10 years.
    Warranty expires at 7 years, so needs to be changed at that time for your own peace of mind!!
    Came quickly from supplier. All instructions are supplied with the product, as well as the 3 x AA Batteries.
    Well worth the money for your security, as Carbon Monoxide can be fatal!!

  82. Anonymous says:

     United Kingdom

    Simple to use which is great for us technophobes. A great price compared to others

  83. Jonathan says:

     United Kingdom

    Good value item which arrived pre expected date of delivery. Easy to install and test produced a deafening alarm which is very useful when sited at rear of house. If this last and works as well as old detector I will be delighted with my choice.

  84. ArthurTheriot says:

     United Kingdom

    I was very pleased with this item and it arrived on time

  85. DSPTrevorods says:

     United Kingdom

    I had the gas board come due to a break down and they wanted to charge me 30.00 for one so I bought this and I am highly satisfied

  86. NannieZlephgrj says:

     United Kingdom

    Golden Review Award: 7 From Our UsersIt is difficult to review this item as I will not know how good or bad it is until, or unless, my boiler develops a fault and releases carbon monoxide into the room. Hopefully that will not happen, however I feel confident that this product will alert the family well before any damage is done, should a leak occu

  87. LucioCartwright says:

     United Kingdom

    Golden Review Award: 2 From Our UsersI received this item on the delivery date I was given. It is just as described and fits just where I want it. I would recommend anybody wanting a detector to purchase this item.

  88. JohnieAngela says:

     United Kingdom

    My last KIDDE carb mon dets were long life and trouble free, these were about the best price I could find so I hope I’m OK for another 10 years !

  89. Anonymous says:

     United Kingdom

    Nice and slim. Stands on its own. Does the job on the label.

  90. Anonymous says:

     United Kingdom

    Golden Review Award: 39 From Our UsersThe same model of this carbon monoxide detector was already installed in the property when we arrived, and had worked efficiently for years. When it gave us the “bleeping” warning that it was time to replace it, we decided to purchase the same Kidde detector which is now installed and working perfectly.

  91. Anonymous says:

     United Kingdom

    Does exactly what it said it would do. Delivered promptly. Provides reassurance for everyone in the home.

  92. Anonymous says:

     United Kingdom

    Excellent product,bought to replace exhausted previous Kidde models. Working silently away no problem.

  93. JaneChilders says:

     United Kingdom

    Good value for money and easy to set up. Bought one on recommendation from chimney sweep, but this was much cheaper and almost identical to the one he was going to sell me at 3 times the price!!!

  94. JoanneMcAlpine says:

     United Kingdom

    This is our 3rd one of these now and they do as it says on the tin!!!

  95. Vanessa Hand Orellana says:

     United Kingdom

    Not much to say really, worked straight out of the box, neat alarm smaller than my kidde alarm it replaces, hope to get years of service out of it like the one it replaced

  96. Anonymous says:

     United Kingdom

    his is my second one. put them in lounge and beside gas boiler. so easy to put together even for me. would recommend.

  97. Anonymous says:

     United Kingdom

    Golden Review Award: 46 From Our UsersThe unit is small enough to be discrete in the kitchen. We asked for advice and were told that a simple alarm is far better than ones that give constant read outs which only serve to give you more to do and are unnecessary…you just want to know if there is a problem. I can’t say whether it is effective or not..no way of knowing unless there was a problem.

  98. Anonymous says:

     United Kingdom

    Golden Review Award: 14 From Our UsersEasy to install. Have had one of these in the past and this is a replacement. Quite happy to stay with this brand until it also needs replacing – recommended replacement date clearly displayed on the unit.

  99. AprilSavage says:

     United Kingdom

    Golden Review Award: 33 From Our UsersThis is the 3rd Kidde CO2 alarm Ive bought, they arrive well packed and promptly. Instructions are easily understood and the units work extremely well. If you are thinking about buying one – DO IT you will not be sorry.

  100. Anonymous says:

     United Kingdom

    Golden Review Award: 22 From Our UsersI chose this Kidde CO2 detector because they are large long established company and their products get excellent reviews.
    It looks well designed and made – my last CO2 detector lasted 7 years (different make) so I hope this one will last at least as long.
    it set up easily and gives a feeling of confidence – of course I won’t know unless / until we discover a CO 2 leak just how effective it is.