Simplex TrueAlarm Analog Sensing. Weatherproof Duct Housing Enclosure.

SIMPLEX 4098-9685 2 Wire Duct Detector Sensor NEW (Sealed)

Simplex 4098‑9756 Addressable TrueAlarm 4‑Wire Duct Smoke Sensor

SIMPLEX 4098-9792

SIMPLEX 4098-9685 2 Wire Duct Detector Sensor GENUINE NEW

Simplex 4098-9852 10" In-Duct Senor Housing

Simplex 4004 565-598 Contact Closure Dact Assy/Dact Card USED with Screws