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LFHSHR3 Cooper Wheelock Exceder LED3 520 Hz Low Frequency Sounder Strobes - FIRE

  • Meets dual low frequency sounder codes for sleeping rooms in a single device
    • NFPA 72 for fire alarm
    • NFPA 720 for CO alarm
  • 4 Settings in 1 device
    • T3 (fire)
    • T4 (CO)
    • Continuous (Coded)
    • T3/T4
  • Energy efficient
    • Patented LED technology provides industry's lowest current draw
  • Low-profile design
    • Smallest footprint with sleek, modern aesthetics
  • 110 or 177 candela setting (dependent on model)
  • Easy-to-install
    • Finger slide switches--No tools needed for setting changes
    • Built-in level adjustment feature and snap-on grille cover
    • IN/OUT screw terminals using #12 to #18 AWG wires
    • Mounting Options: Trim plate (LFTP) for single-gang backbox included in all LFHNK3/LFHSK3/LFHSH3 models; Exceder LSPKBB backboxes and 4" square backboxes
  • Strobe synchronization components
    • Meet synchronizing standards with Wheelock's DSM Sync Modules or Power Supplies
More details...
MSRP Price: $150.61
Online Price: $120.00

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Product Details

Eaton has developed the Wheelock Exceder LED3 Low Frequency Sounder Strobes (LFHSK3/LFHSH3) and Sounders (LFHNK3) to meet the National Fire Protection Association (NFPA) low frequency sounder requirements for sleeping rooms



  • Material - Red or white textured UV stabilized, colored impregnated engineered plastic. Exceeds 94V-0 UL flammability rating
  • Weight - 1.10 lbs.
  • Lens - Light Emitting Diode (LED) in a rugged Lexan lens
  • Dimensions - 6.23"H x 4.69" W x 1.77" D (with LFTP trim plate)
  • Operating Temperature - Indoor: 32F to 122F (0C to 50C) and maximum humidity of 93%

Mounting & Wire Connections

  • Mounting (indoor only) - Wall-mount applications for sounder strobe (LFHSK3/LFHSH3); Wall and ceiling-mount applications for the sounder only model (LFHNK3). Trim plate for single-gang backbox included in all LFHNK3/LFHSK3/LFHSH3 models; Exceder LSPKBB backboxes and 4" square backboxes
  • Wire Connections - #12 through #18 AWG

Power & General

  • Operating voltage - 24 VDC: 16 - 33 VDC
  • Strobe Output Rating - UL 1971: 110 candela output (LFHSK3 models)/ 177 candela output (LFHSH3 models)
  • Strobe Flash Rate - Strobes are designed to flash at 1 flash per second
  • Synchronization Models - Strobes can be synchronized with Wheelock's DSM Sync Modules, PS Power Supplies, using Wheelock patented sync protocol
  • Temporal Audible Pattern - Continuous, Code 3, Code 4 or Code 3/Code 4 Sync Control. The Code 3 temporal pattern (1/2 second on, 1/2 second off, 1/2 second on, 1/2 second off, 1/2 second on, 1-1/2 off and repeat) is specified by ANSI and NFPA 72 for standard emergency evacuation signaling. The Code 4 temporal pattern (four cycles of 100 milliseconds 10 percent on and 100 milliseconds 10 percent off, followed by 5 seconds 10 percent off)is specified by NFPA 720

LFHSHR3 Specification Sheet

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DWG - 800 Shames Drive , Westbury , NY 11590 , USA - 516-933-4900
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