Gentex GN-503F Combination Photoelectric Smoke & Carbon Monoxide Alarm

  • MPN: GN-503F
  • JMAC ID: 200043141
$84.65
JMAC_ID:
200043141
df_manual_boost:
2.20
Please Note: In order to keep our prices low, we have a minimum order requirement of $99
The Gentex GN-503F is a hard-wired, photoelectric smoke/carbon monoxide alarm designed to replace unreliable nuissance alarms.

This device is backed by a one year warranty, as well as a five year limited warranty on the carbon monoxide sensor. It features an 85dBA alarm horn at 10 feet, operates at 120 VAC, and has a 9V backup battery that provides power to the unit even after a power outage.

With Dual Link tones, a self test push button, a low-battery indicator, and a 5 year service life, the Gentex GN-503F is a beacon of high-performance smoke and carbon monoxide detection. It comes with a fast disconnect wiring harness, a non-latching alarm, and is able to connect to 12 other Gentex combination smoke and carbon monoxide alarms.

Unlike the Gentex GN-503, the Gentex GN-503F includes a Form A/Form C Relay.

UPC: 700217028094
Also known as: GN-GN503F, GN503F

Technical Specifications:
  • CO Sensing Cell: Electrochemical Cell
  • Secondary Power Source: Alkaline 9VDC battery (Duracell® MN 1604)
  • Size:
    -Diameter at base: 5.75 in. (14.605 cm)
    -Overall diameter 6.25 in. (16.51 cm)
    -Depth: 1.8 in. (4.572 cm)
  • Auxiliary Relay: 1 Form A & 1 Form C (0.5 amp)
  • Alarm Horn Rating: 5dBA at 10 feet (3.048 m)
  • Operating Ambient Temp Range: 40°F to 100°F (4.4°C-38°C)
  • Operating Current (Relay Options): .070 amps
  • Operating Current: .045 amps
  • Operating Voltage: 120VAC, 60Hz


For more information about the Gentex GN-503F, please contact us.
  • Additional Smoke Alarm Features
    -Photoelectric smoke sensing technology
    -Temporal 3 evacuation sounding pattern for smoke annunciation
    -Nominal 2.5% sensitivity (smoke)
    -Solid state red LED to indicate smoke presence
  • 5 year limited warranty on CO sensor
  • 1 year warranty from date of purchase
  • Low or missing battery indicator
  • Dust cover to prevent contamination during installation
  • Mounting hardware adapts to standard junction boxes, including but not limited to 4x4x2-1/8 octagon
  • Red LED pulses every 30 seconds, green LED for AC power on
  • Fully insect protected
  • Non-latching (self restoring) alarm
  • FF Model: Two (2) sets of Form A/Form C contacts that activate independently for smoke and CO events
  • Includes 9VDC battery back-up
  • Relay contacts operate on battery back-up
  • Push button self test feature
  • Push button functional test feature
  • F Model:One (1) set of Form A/Form C contacts that activate for smoke and/or CO events
  • Meets sensitivity requirements ofANSI/UL 2034
  • Quick-disconnect wiring harness
  • Horn frequency 3100 Hz (nominal)
  • Additional CO Alarm Features
    -Electrochemical sensor
    -Temporal 4 sounding pattern for CO annunciation
    -End of life signal indicates CO sensor has reached depletion state and unit must be replaced

2 Reviews

  • 5
    GENTEX-GN-503F

    Posted by 181121 on Feb 14th 2022

  • 5
    GENTEX-GN-503F

    Posted by 127150 on May 18th 2018

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