System Sensor HGWL-LF L-Series Indoor Low-Frequency Compact Sounder, 2-Wire, Wall Mount, White
The System Sensor HGWL-LF is a compact low-frequency sounder from the L-Series, designed to provide dependable audible notification in sleeping areas and other indoor applications. Featuring a clean white housing and compact wall-mounted design, the HGWL-LF delivers a 520 Hz square wave tone that complies with NFPA 72 requirements for low-frequency occupant notification.
Engineered for modern fire alarm systems, the HGWL-LF offers field-selectable tone settings, a plug-in design for quick installation, and a universal mounting plate with an onboard shorting spring that allows wiring continuity to be tested before the device is installed. Its compact size makes it an excellent choice where space is limited while maintaining the performance and reliability expected from the System Sensor L-Series.
Key Features
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Compact indoor low-frequency sounder
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2-wire wall-mounted design
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White housing with no marking
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520 Hz ±10% square wave tone
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Complies with NFPA 72 sleeping area requirements
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Field-selectable High and Low output settings
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Temporal 3, Temporal 4, Continuous, and Coded tone options
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Plug-in design for fast installation
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Universal mounting plate with onboard shorting spring
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Minimal intrusion into the back box
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Compatible with legacy SpectrAlert and SpectrAlert Advance devices
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Compatible with the MDL3 Sync Module
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Modern compact L-Series design
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Genuine System Sensor notification appliance
Applications
The System Sensor HGWL-LF is ideal for:
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Hotels and motels
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Apartment buildings
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Student housing
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Hospitals
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Assisted living facilities
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Nursing homes
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Dormitories
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Residential care facilities
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Commercial buildings requiring NFPA 72 compliant sleeping area notification
Specifications
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Manufacturer: System Sensor
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Model: HGWL-LF
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Product Series: L-Series
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Product Type: Compact Low-Frequency Sounder
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Installation: Indoor
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Mounting: Wall
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Wiring: 2-wire
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Housing Color: White
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Frequency: 520 Hz ±10%
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Tone Type: Square wave
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Tone Settings: High/Low, Temporal 3, Temporal 4, Continuous, and Coded
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Operating Voltage: Regulated 24VDC/FWR
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Mounting Plate: Universal with onboard shorting spring
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Compatibility: SpectrAlert, SpectrAlert Advance, and MDL3 Sync Module
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Compliance: NFPA 72
Why Choose the System Sensor HGWL-LF?
The System Sensor HGWL-LF combines a compact design with powerful low-frequency audible notification to help meet modern fire alarm requirements for sleeping areas. Its 520 Hz output, flexible field-selectable settings, fast plug-in installation, and compatibility with existing L-Series and SpectrAlert systems make it an ideal solution for new installations and retrofit projects where dependable occupant notification and space-saving design are essential.
