System Sensor HWL2-LF Low Frequency Sounder Wall White

Product Description

The SYSTEM SENSOR HWL2-LF is a low frequency wall-mount sounder designed for fire alarm and life safety notification systems. Low frequency audible signals in the 520 Hz range are required by NFPA 72 for sleeping area notification, where research has shown standard 3 kHz tones are less effective at waking occupants. This device delivers that low frequency output in a white, wall-mount enclosure suited for residential and light commercial installations. It is installed by licensed fire alarm technicians and electricians working on notification appliance circuits.

The HWL2-LF is applied in residential and light commercial fire alarm systems where low frequency audible notification is required, particularly in sleeping areas. It mounts to a standard electrical wall box and connects to a supervised notification appliance circuit. White finish integrates with standard interior wall surfaces. Typical installations include single-family homes, apartments, hotels, dormitories, and assisted living facilities where code-compliant low frequency audible alerting is required.

Key Features

• Low frequency sounder output suited for sleeping area fire alarm notification
• Wall-mount form factor for standard electrical box installation
• White finish for unobtrusive interior placement
• Designed for use on supervised notification appliance circuits
• Sold as a single unit per package

Compatibility

Designed as an OEM-style notification appliance for use on standard fire alarm notification appliance circuits in residential and light commercial life safety systems.

Installation Notes

Installation should be performed by a licensed fire alarm technician or electrician in accordance with NFPA 72 and applicable local codes. Disconnect and lock out power to the notification appliance circuit before wiring. Mount to a properly sized wall box and verify polarity on the NAC wiring before restoring power. Conduct a full system functional test after installation to confirm audible output and circuit supervision.