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4-Wire Duct Smoke Detector 4 wire Photoelectric Duct Smoke Detector. Square or Rectangular Footprint. 24 or 120 volts. 100 to 4000 FPM. Max temp 158F. 1 SPST N/O alarm, 2 SPDT auxilliary and 1 SPST N/O supervisory contacts.

Metal sample tube for smoke detection in 2-4 foot ducts

Metal Sample Tube 4-8Ft * Metal sample tube for smoke detection in 4-8 foot ducts

Metal sample tube for smoke detection in 1-2 foot ducts

Metal Smple Tube 8-12ft * Metal sample tube for smoke detection in 8-12 foot ducts

Remote Test Station w/ Key * Remote test station with key.

Remote Test Station * Remote test station for System Sensor smoke and fire detectors.

USE PART# DST1.5