$500

Gent S4-34760 Duct Smoke Sensor Housing C/W 0.6M Venturi Tube

$88.13

Kidde P3010K-CO 10-Year Sealed Battery Photoelectric Smoke & Carbon Monoxide Ala

$60

System Sensor D4120 Smoke Detector for Duct Application, Black "E3D"

$43.05

First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with 1-Pack, White

$35

BOSCH D288 2-WIRE SMOKE DETECTOR BASE, Open Box, White Large, C-5

$42.75

Smoke Detector Base,6", 4 Wire W/Relay, 24 Volt. System Sensor Model #B112LP

$54.95

Apollo Series 65A 55000-328 Smoke Detector

$18.24

System Sensor Smoke Detector Base B210LPA

$14.9

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

$1228.8

Edwards SIGA-SD Duct Signature Smoke Detector PACK OF 5

$53

System Sensor A5069 Replacement Detector Board Brand New

$120

Siemens ABHW-4B Audible Base