Kidde Firex Smoke Detector, Hardwired with 9-Volt Battery Backup, Smoke Alarm, 6-Pack 21005927 - The Home Depot
First Alert Brk 6-Pack Hardwired Ionization Sensor Smoke Detector in the Smoke Detectors department at Lowes.com
Kidde Firex Hardwired Inter-Connectable 120-Volt Auxiliary Heat Detector 135 Degree with Battery Backup 21029895 - The Home Depot
Eaton Wiring 2-Way Infrared/Daylight Ceiling Sensor, Line Voltage, Up To 2000 Sq.ft, 120V-347V, White (Eaton Wiring AHAC-DT-2000-MV) | HomElectrical.com
First Alert 9120BFF Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack - Amazon.com
Bundle of 3 First Alert Hardwired 120-Volt AC Smoke Alarm with Plugs, SA9120BPCN
LEVITON® Provolt™ Occupancy Sensor | Line Voltage | White
Essential Overvoltage Protection for Fire Alarm Systems - Technical Articles
Optical Smoke Detector ES Detect with Relay Contact | Smoke Detectors | Sensors | Smoke Detectors | Honeywell Building Solutions