SDi Fire can provide you with alarm component testers to make sure your alarms don’t degrade and make sure they are operating properly.
The Fire Alarm Supplier
MTech's Analog Addressable Fire Alarm System
The Fire Alarm Supplier
Kidde Fire Sentry Smoke Detector, 9V Battery Powered Smoke Alarm, 4 Inch Compact Design
How Does an Addressable Fire Alarm System Work? - High Rise Security Systems
First Alert 9120BFF Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack
Nuclear Equipment Testing
Fire alarm system - Wikipedia
Detector Testers