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The System Sensor HGRL-LF is a low-frequency compact horn from the L-Series notification appliance family, engineered to meet modern fire-alarm and sleeping-area audibility requirements. It produces a 520 Hz ± 10 % low-frequency square-wave tone that aligns with NFPA 72 voice/alerting standards, making it especially effective at awakening occupants, including those with hearing impairments.
Low-Frequency Tone (520 Hz): Designed to satisfy NFPA 72 2010/2013 low-frequency requirements for sleeping areas and other spaces where improved audibility is critical.
Multiple Tone/Pattern Selection: Supports a variety of tone patterns, including Temporal 3, Temporal 4, Continuous, and Coded, via a rotary switch — versatile for many applications.
Compact Wall Mount Design: Fits a standard single-gang electrical box with minimal intrusion, ideal for tight installations.
Universal L-Series Mounting Plate: Plug-in design with a shorting spring enables wiring continuity testing before final installation, saving time and reducing ground-fault issues.
Legacy Compatibility: Electrically compatible with legacy SpectrAlert and SpectrAlert Advance systems, simplifying upgrades or retrofit work.
Tamper-Resistant Aesthetics: Sleek housing enhances interior appearance while meeting life-safety signage expectations.
| Weight | 2 lbs |
|---|---|
| Dimensions | 6 × 6 × 6 in |
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The System Sensor HGRL-LF is a low-frequency compact horn from the L-Series notification appliance family, engineered to meet modern fire-alarm and sleeping-area audibility requirements. It produces a 520 Hz ± 10 % low-frequency square-wave tone that aligns with NFPA 72 voice/alerting standards, making it especially effective at awakening occupants, including those with hearing impairments.
Low-Frequency Tone (520 Hz): Designed to satisfy NFPA 72 2010/2013 low-frequency requirements for sleeping areas and other spaces where improved audibility is critical.
Multiple Tone/Pattern Selection: Supports a variety of tone patterns, including Temporal 3, Temporal 4, Continuous, and Coded, via a rotary switch — versatile for many applications.
Compact Wall Mount Design: Fits a standard single-gang electrical box with minimal intrusion, ideal for tight installations.
Universal L-Series Mounting Plate: Plug-in design with a shorting spring enables wiring continuity testing before final installation, saving time and reducing ground-fault issues.
Legacy Compatibility: Electrically compatible with legacy SpectrAlert and SpectrAlert Advance systems, simplifying upgrades or retrofit work.
Tamper-Resistant Aesthetics: Sleek housing enhances interior appearance while meeting life-safety signage expectations.
| Weight | 2 lbs |
|---|---|
| Dimensions | 6 × 6 × 6 in |
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