Best Smoke & Carbon Monoxide Alarms — Standalone + Budget (2026)
2 smoke & carbon monoxide alarms matching connectivity “Standalone” + price “Budget”, 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
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