$40

System Sensor i3, 2 W-B, 2-Wire Photoelectric Smoke Detector, new

$21

SYSTEM SENSOR RTS451 DUCT FIRE / SMOKE DETECTOR

$225

Innovair Flex D4129 Duct Smoke Detector w/ Components

$14.9

Vintage First Alert Battery Powered Smoke/Fire Detector Alarm SA92LT NOS 1994

$75

New System Sensor/BRK 1851B Smoke Detector

$18.24

System Sensor Smoke Detector Base B210LPA

$45

Honeywell Silent Knight Addressable Photoelectric Smoke Detector (SK-PHOTO-W)

$98.85

‎Notifier FSP-951-selft intelligent Photoelectric Sensor, Smoke Detector

$50

System Sensor 2W-B Smoke Detector 2-Wire White, E-10

$25

Kidde Carbn Monoxid Detector, AA Battery CO Alarm LEDs, Test-Reset Button Portab

$37.8

HONEYWELL Security Equipment K9194 Panel Only Used

$60

System Sensor 4WT-B i3 Series 4-wire Photoelectric Smoke Detector