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Horns & Sounders

SpectrAlert® Advance Selectable-Output Low Frequency Sounder

SpectrAlert® Advance HR-LF Selectable-Output Low Frequency Sounders are red, two-wire, 12/24V, low frequency sounders for wall or ceiling installation.

Overview
SpectrAlert® Advance HR-LF Selectable-Output Low Frequency Sounders are red, two-wire, 12/24V, low frequency sounders for wall or ceiling installation. These sounders are designed to address the NFPA 72 sleeping space requirements that require a low frequency notification appliance that operates within frequency range of 520 Hz ± 10% and is of a square wave tone. These devices feature plug-in designs with minimal intrusion into the back box, making installations fast and foolproof while virtually eliminating costly and time-consuming ground faults.Certifications:
  • UL Listed: S4011
  • MEA Listed: MEA452-05-E
  • FM Approved: 3047563
  • CSFM: 7135-1653:0223; 7125-1653:0224
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HR-LF
Low Frequency Sounder, Wall or Ceiling Mount, Red, 2-wire, 1224V
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HR-LF
Low Frequency Sounder, Wall or Ceiling Mount, Red, 2-wire, 1224V