Gentex GN-503FF

GentexSKU: GN-503FF

Sale price$77.40 Regular price$92.88

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In stock (50 units), ready to be shipped

Pickup available at Phoenix, AZ

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Gentex GN-503FF Combination Photoelectric Smoke and Carbon Monoxide Alarm, 2 Sets Form A/Form C Relay Contacts, 120VAC with 9VDC Battery Backup.

The GN-503 Series combination photoelectric smoke/electrochemical carbon monoxide alarms are single/multiple station designed as an evacuation device for use in all dwelling units, including but not limited to homes, apartments, hospitals, nursing homes, hotels, and motels, in compliance with ANSI/UL 217, ANSI/UL 2034, applicable IBC/IFC/IRC Standards and NFPA 72 and NFPA 720.


  • GN-503 Series is 120VAC with 9V battery back-up.
  • Low or missing battery indicator.
  • 9V battery shipped with product.
  • Photoelectric smoke sensor.
  • Electrochemical CO sensor.
  • Push button self-test feature.
  • Push button functional test.
  • Horn frequency 3100Hz.
  • Temporal 3 sounding pattern for smoke annunciation and temporal 4 sounding pattern for CO annunciation.
  • GN-503F features one (1) set of Form A/Form C contacts that activate for smoke and/or CO events.

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