Best Smoke & Carbon Monoxide Alarms — Standalone (2026)
5 smoke & carbon monoxide alarms matching connectivity “Standalone”, hand-picked from UK Amazon listings.
#1 Pick
FireAngel FA6120-INT-T2 Smoke Alarm Detector, WhiteRated 4.5 out of 5 stars (1,876)
- Standalone
- 2 years
£14.99
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 DetectorRated 4.6 out of 5 stars (943)
- Standalone
- 5 years
£32.99
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
£24.99
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 HomeRated 4.6 out of 5 stars (2,764)
- Standalone
- 10 years
£19.99
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
Defender 10 Year Carbon Monoxide Alarm, BSI Rated, Battery Powered CO Detector with LCD Digital DisplayRated 4.4 out of 5 stars (612)
- Standalone
- 10 years
£17.99
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