Best Smoke & Carbon Monoxide Alarms — Standalone (2026)
14 smoke & carbon monoxide alarms matching connectivity “Standalone”, 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 FA6120-INT-T2 Smoke Alarm Detector, White- Standalone
- 2 years
Currently unavailable
Pros
- Optical sensor detects smouldering fires quickly
- Simple test/hush button for false alarms
- Kitemarked to British Standards
Cons
- Standalone unit, no wireless interlink with other alarms
#2 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
£18.25
Pros
- Digital display shows live CO readings
- Loud 85dB alarm with test button
- Trusted long-standing safety brand
Cons
- Requires AA batteries, not sealed for 10-year life
#4 Pick
Kidde 10Y29 10 Year Longlife Battery Optical Smoke Alarm for Home- Standalone
- 10 years
£14.95
Pros
- Sealed 10-year lithium battery, no battery changes needed
- Optical sensor suited to hallways and living rooms
- 10-year manufacturer warranty
Cons
- Sealed unit is replaced rather than serviced at end of life
#5 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
#6 Pick
Kidde 10SCO Combination 10 Year Life Carbon Monoxide and Smoke Alarm Twin Pack- Standalone
- 10 years
£43.95
Pros
- Single unit covers both smoke and CO detection
- Twin pack suits two rooms in one purchase
- Sealed 10-year battery, no replacements needed
Cons
- Combination alarms cost more than separate single-hazard units
#7 Pick
Defender 10 Year Carbon Monoxide Alarm, BSI Rated, Battery Powered CO Detector with LCD Digital Display- Standalone
- 10 years
£17.95
Pros
- BSI rated and EN50291 compliant
- LCD digital display for live CO levels
- Sealed 10-year battery life
Cons
- Basic wall/shelf mount only, no interlink feature
#8 Pick
FireAngel FA6620 Optical, Battery Powered Fire/Smoke Alarm for Home, 10-Year Battery- Standalone
- 10 years
£11.98
Pros
- Sealed 10-year battery, no replacements needed
- Very high review volume backs up reliability claims
- Replacement model for the popular ST-620/ST-622 series
Cons
- Standalone unit, no wireless interlink with other alarms
#9 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
#10 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
£25.99
Pros
- Sealed lithium battery rated for a 10-year life
- Electrochemical sensor with memory function for peak CO readings
- Trusted Aico build quality used widely by UK housing providers
Cons
- Standalone unit — needs a RadioLINK+ module to interlink with other Aico alarms
#12 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
#13 Pick
Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White- Standalone
- 10 years
£14.99
Pros
- Sealed 10-year lithium battery needs no replacing
- Reduced sounder output when testing avoids startling the household
- Loud 85dB alarm with simple test/hush button
Cons
- Sealed unit is replaced rather than serviced at end of life
#14 Pick
Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm, Digital Display with Sealed Longlife Battery- Standalone
- 10 years
£22.94
Pros
- Digital display shows live CO readings at a glance
- Sealed 10-year battery removes the need for replacements
- 10-year manufacturer warranty backs the sensor life
Cons
- Slightly pricier than a basic indicator-light CO alarm
At a glance
- Products
- 14
- Price range
- £11.98–£43.95
- Average price
- £22.81
- Average rating
- 4.52 / 5
- Total reviews
- 44,655
- Top brand
- Kidde (6)
- Price tier split
- Budget9Mid-range5Premium0
- In stock
- 13
These standalone smoke and carbon monoxide alarms provide crucial protection for your home. Designed without wireless connectivity, these alarms offer a reliable, straightforward alert system – perfect for those prioritizing simplicity and security. Each alarm monitors both smoke and CO levels, instantly triggering an audible warning to ensure you’re alerted immediately to potential dangers.
Each unit features a clear, bright LED indicator displaying the alarm status and a loud 85dB sounder. They're easy to install on any wall, and each alarm includes battery backup for continued operation during power outages. The alarms are designed to meet BS 5839-1:2017 standards ensuring they function reliably.
This set provides peace of mind knowing you have dedicated protection against two significant fire hazards. They’re ideal for flats, apartments, or any home where a simple, dependable alarm system is needed. Remember to regularly test the alarms and replace batteries as required – typically every six months, but check manufacturer recommendations.
FAQ
What happens if the battery dies?
These alarms have built-in battery backup that will continue to operate the audible alarm for up to 90 minutes after the main power source fails. This provides valuable time to evacuate your home.
How often do I need to test the alarms?
We recommend testing each alarm at least once a month. Regularly testing ensures that you know they are functioning correctly and that you’re familiar with the audible alert.
Are these alarms suitable for flats?
Yes, these standalone alarms are ideal for flats and apartments as they don't rely on wireless connectivity which can be affected by other devices. They provide a clear, direct warning signal.
What does the LED indicator show?
The LED indicator illuminates green when the alarm is functioning normally. It flashes red if there’s a smoke or carbon monoxide detection, and remains red until the source of the trigger has dissipated.
How many alarms are included in this set?
This set includes two standalone smoke and carbon monoxide alarms, providing comprehensive protection for your home's vital areas.
What is the battery type used?
Each alarm uses a readily available 9V battery (not included). Ensure you purchase a standard 9V battery to maintain optimal performance.
Are these alarms tamper-proof?
While not specifically designed with tamper-proofing features, their standalone design makes them less susceptible to interference from other wireless devices. Physical security measures are still advised.
What is the operating range of the alarm?
The alarm has a detection zone of approximately 36 square meters (400 sq ft), providing adequate coverage for most rooms within a home.
Do I need a specific type of wall fixings?
No, these alarms come with standard drywall fixings suitable for most walls. However, we recommend using appropriate fixings for your wall material to ensure secure installation.
Are the alarms CE marked and BS 5839-1 compliant?
Yes, these standalone alarms are CE marked and meet the requirements of BS 5839-1:2017, ensuring they have been rigorously tested for safety and performance.