Best Smoke & Carbon Monoxide Alarms — Standalone + 5 years (2026)
5 smoke & carbon monoxide alarms matching connectivity “Standalone” + warranty “5 years”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Kidde 7DCOC Carbon Monoxide Alarm, White vs FireAngel FA6120-INT-T2 Smoke Alarm Detector, White: Which Smoke & Carbon Monoxide Alarms Is Better? guide.
#1 Pick
FireAngel Smoke and Carbon Monoxide Alarm 2-Pack — SB1-R Toast Proof Smoke Alarm and FA3313 10-Year CO Detector- Standalone
- 5 years
£26.00
Pros
- Bundle covers both smoke and CO detection in one purchase
- "Toast proof" sensor reduces false alarms near kitchens
- 10-year sealed battery on the CO detector
Cons
- Two separate standalone units, not interlinked
#2 Pick
Kidde Smoke Alarm and CO Detector Bundle for Home — 10Y29 10 Year Battery Smoke Alarm and K5CO Battery Carbon Monoxide Detector with AA Batteries- Standalone
- 5 years
£25.00
Pros
- Bundles a 10-year smoke alarm with a separate CO detector
- Trusted long-standing safety brand
- Batteries included, ready to fit out of the box
Cons
- Two standalone units, not interlinked
#3 Pick
FireAngel Optical Smoke Alarm 2-Pack — FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button, Replacement for FireAngel ST-622/ST-620- Standalone
- 5 years
£22.16
Pros
- Twin pack covers two rooms in one purchase
- Sealed 10-year lithium battery, no replacements needed
- Test/silence button for easy false-alarm hushing
Cons
- Standalone units, no wireless interlink between the two alarms
#4 Pick
FireAngel FA3313-T2 Carbon Monoxide Alarm and Detector — 10-Year Sensor Life CO Alarm for Home with 1-Year Replaceable Batteries, Travel/Portable CO Detector, 2-Pack, White- Standalone
- 5 years
£36.00
Pros
- 10-year sensor life reduces long-term running costs
- Twin pack suits both kitchen and bedroom coverage
- Compact and portable, suits travel and caravans too
Cons
- Batteries are replaceable rather than fully sealed for 10 years
#5 Pick
Ei Electronics Ei650i Optical Smoke Alarm, White- Standalone
- 5 years
£24.20
Pros
- Continuous self-check reduces false alarms
- Easy to install with test button
- Trusted Ei Electronics/Aico safety brand
Cons
- Standalone unit, no wireless interlink
At a glance
- Products
- 5
- Price range
- £22.16–£36.00
- Average price
- £26.67
- Average rating
- 4.56 / 5
- Total reviews
- 14,771
- Top brand
- FireAngel (3)
- Price tier split
- Budget2Mid-range3Premium0
- In stock
- 5
These standalone smoke and carbon monoxide alarms provide comprehensive protection for your home. Designed for simple installation and reliable performance, this set offers peace of mind knowing you're safeguarded against two of the most common household hazards. Each alarm features both a bright visual alarm and a distinctive audible warning, ensuring early detection in any situation.
This particular selection includes five individual alarms, providing complete coverage for your property. The 5-year manufacturer’s warranty offers substantial reassurance regarding long-term reliability, covering potential manufacturing defects. Amazon's standard returns policy applies to these alarms, allowing you to return them within 30 days of delivery if they don’t meet your expectations – subject to their terms.
FAQ
What type of batteries do these alarms use?
These standalone alarms utilise readily available AA alkaline batteries. It's recommended to check the battery levels monthly and replace them as needed, typically every six months for optimal performance.
How many rooms can one alarm cover effectively?
While a single alarm can provide protection within a small room (approximately 30-40 square metres), it’s best practice to install multiple alarms throughout your home, particularly on each floor and near sleeping areas.
Are the alarms tamper-proof?
Yes, these alarms feature a tamper seal to prevent false activations. If the alarm is tampered with, the sensor will disable, preventing nuisance alerts and alerting you to a genuine hazard.
Do I need a separate power supply for these alarms?
No, these standalone alarms are entirely battery-powered. They don’t require mains electricity, providing flexibility in installation locations throughout your home.
What happens if the alarm goes off falsely?
The alarms have a hush feature allowing you to silence nuisance alerts caused by cooking steam or dust. Once the source of the trigger is removed, the alarm will automatically restart.
How often do I need to test the alarms?
It’s essential to test each alarm at least once a month using the test button. This ensures that all components are functioning correctly and that you are familiar with the audible alert.
What does the 5-year warranty cover specifically?
The 5-year warranty covers defects in materials and workmanship under normal household use. It doesn’t cover damage caused by misuse, neglect, or external factors like fire or flood – refer to the manufacturer's documentation for full details.
Can I link these alarms together to receive alerts on my phone?
No, these are standalone alarms and do not include smart home connectivity features. They operate independently with audible and visual warnings only.
What is Amazon’s returns policy for these alarms?
Amazon's standard returns policy applies; you have 30 days from delivery to return the alarms unused, in their original packaging, subject to their terms and conditions. Please check the Amazon website for detailed information.
Are the alarm sounds easily distinguishable?
Each alarm features a distinct audible tone – a piercing beep for smoke detection and a lower-frequency drone for carbon monoxide detection – allowing you to quickly identify the type of hazard that has triggered the alert.