Best Smoke & Carbon Monoxide Alarms — Interlinked (2026)
1 smoke & carbon monoxide alarms matching connectivity “Interlinked”, 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.
Interlinked smoke and carbon monoxide alarms provide comprehensive protection for your home by working together seamlessly. These alarms are designed to alert you to the presence of fire or dangerous levels of carbon monoxide, regardless of which hazard triggers first. The interlinked system ensures that if one alarm detects a problem, all connected alarms will sound simultaneously, providing immediate notification throughout your property. This dual detection is crucial for safeguarding your family's wellbeing and offers peace of mind.
#1 Pick
Aico Ei3016 230V Mains Powered Optical Smoke Alarm with Rechargeable Battery Backup- Interlinked
- 10 years
£53.50
Pros
- 230V mains powered with 10-year rechargeable battery backup
- AudioLINK+ lets you extract alarm history via smartphone app
- Interlinks with other Aico RadioLINK and hard-wired alarms
Cons
- Mains wiring means professional installation is usually required
FAQ
What does ‘interlinked’ actually mean in this context?+
‘Interlinked’ signifies that these alarms are connected wirelessly, so when one detects smoke or carbon monoxide, all the alarms within the set communicate the danger. This coordinated response ensures you're alerted to any potential threat as quickly as possible throughout your home.
How many alarm units can I typically link together?+
The number of units you can connect varies by manufacturer but generally ranges from 6 to 10 alarms within a single set. Always check the specific product details on Amazon UK for the exact limit and range before purchasing.
Do the alarms require a battery, or are they mains powered?+
Most interlinked sets utilise both mains power and long-life lithium batteries as a backup. This dual power supply guarantees operation even if there's a power cut, ensuring continuous protection.
How often should I test the alarms?+
It’s recommended to test your interlinked smoke and carbon monoxide alarms at least once a month. Regularly testing confirms they are functioning correctly and alerts you to any potential issues before they become critical.
What happens if one alarm fails or malfunctions?+
Typically, individual alarms within the set will have a battery backup that allows them to continue operating independently until replaced. Refer to the manufacturer's warranty for specific details regarding replacement units.
Are these alarms suitable for flats and apartments?+
Many interlinked sets are designed with reduced sensitivity to false alarms, which is particularly beneficial in apartment settings where external smoke can easily trigger alerts. Check product specifications for optimal performance.
Do I need a separate battery for each alarm, or is there a central power supply?+
The majority of interlinked systems utilize a central mains power supply with individual alarms having backup lithium batteries. This setup provides reliable protection against both power outages and localized hazards.
How do the alarms communicate with each other – Wi-Fi, cellular, or another method?+
These alarms utilise wireless communication technology, typically employing radio frequency (RF) signals to relay information between units within the set. This allows for near real-time alerts across the entire linked network.
What type of test button do the alarms use – mechanical or digital?+
Most interlinked smoke and carbon monoxide alarm sets feature a push-button test function that activates both the sounder and the battery check. This confirms the system is functioning correctly and provides an easy method for regular maintenance.
Can I replace individual alarms within the set, or do I need to purchase a complete new kit?+
You can usually replace individual alarm units if they require servicing or have a short lifespan. However, it’s generally recommended to purchase replacement sets as they are often designed to work together seamlessly and maintain compatibility.