• 2-Wire Photoelectric Smoke Detector w/Auxiliary..Relay

The UTC Interlogix 731U is a two-wire photoelectric smoke detector wiith a form C auxiliary relay. The detector operates at 12/24VDC and is S11A compatible.

The ESL 700 Series conventional photoelectric smoke detector is an interchangeable head and base detector with a light-scattering optical sensor that provides outstanding stability and excellent response to a wide range of fires.


  • Two-Wire Photoelectric Smoke Detector
  • 12/24VDC
  • Form C Auxiliary Relay
  • S11A Compatible
  • Self-diagnostic Capabililty Continually Monitors Operation
  • Meets NFPA 72 Sensitivity Test Requirements
  • Head and Terminal Base Design (base sold separately)
  • Automatic Drift Compensation
  • Field-replaceable Optical Chamber
  • Low Profile Design Blends into the Ceiling
  • Advanced Alarm Verification Nuisance Alarm Immunity
  • Continuity Switch in Base to Ease Installation
  • Extensive Two-Wire Compatibility Listings

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2-Wire Photoelectric Smoke Detector w/Auxiliary..Relay

  • Product Code: UTC:731

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Tags: fire, hardwired smoke detectors, security