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System Sensor HW-LF SpectrAlert Advance Low Frequency 520Hz Fire Alarm Sounder
- Regular price
- $62.00
- Sale price
- $62.00
- Regular price
-
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Product Description P/N: HW-LF
Description
The System Sensor HW-LF is a SpectrAlert Advance low frequency sounder designed for wall or ceiling installation in fire alarm notification systems. It provides a 520 Hz ±10% square wave tone required for sleeping area applications while supporting flexible 12/24V operation and simplified installation.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | System Sensor |
| Category | Fire Alarm Systems |
| Part Number | HW-LF |
| Subcategory | Low Frequency Sounder |
| Series | SpectrAlert Advance |
| Product Type | Low Frequency Fire Alarm Sounder |
| Device Color | White |
| Mounting Type | Wall or Ceiling Mount |
| Operating Voltage | 12/24V |
| Circuit Type | Two-Wire Notification Appliance Circuit |
| Sound Output Frequency | 520 Hz ±10% Square Wave Tone |
| Application | Sleeping areas, residential, commercial, and institutional fire alarm systems |
| Tone Type | Low Frequency Audible Notification |
| Installation Design | Plug-in mounting system |
| Mounting Plate | Universal mounting plate included |
| Wiring Feature | Shorting spring for continuity testing |
| Synchronization | Compatible with MDL3 Sync Module |
| Compatibility | Legacy SpectrAlert devices |
| Construction | Tamper-resistant housing |
| Listings | UL S4011, FM 3047563, MEA452-05-E, CSFM 7135-1653:0223 / 7125-1653:0224 |
| Weight | Approximately 1.0 lb (0.45 kg) |
Information About HW-LF
The HW-LF is part of the System Sensor SpectrAlert Advance low frequency notification appliance family developed to meet NFPA 72 requirements for sleeping spaces. The two-wire sounder produces a low frequency 520 Hz square wave tone designed to improve occupant alerting in residential and similar protected areas. Its plug-in design, universal mounting plate, and wiring continuity testing features help reduce installation time and minimize field wiring issues. The appliance is suitable for commercial, institutional, healthcare, and residential fire alarm systems requiring compliant low frequency audible notification.
Key Features:
- Low Frequency Sound Output: Provides a 520 Hz ±10% square wave tone for sleeping area notification requirements.
- SpectrAlert Advance Series: Designed as part of System Sensor’s advanced fire alarm notification platform.
- Two-Wire Operation: Connects to compatible 12/24V notification appliance circuits.
- Wall and Ceiling Mounting: Supports flexible installation on either wall or ceiling surfaces.
- NFPA 72 Sleeping Space Compliance: Designed to meet low frequency notification requirements for protected sleeping areas.
- Plug-In Design: Simplifies installation with minimal intrusion into the electrical back box.
- Universal Mounting Plate: Allows easier installation and wiring preparation before device connection.
- Wiring Continuity Testing: Integrated shorting spring helps verify circuit wiring before installation.
- Tamper-Resistant Construction: Helps prevent unauthorized adjustments or interference.
- Legacy Compatibility: Electrically compatible with legacy SpectrAlert devices.
- MDL3 Sync Compatibility: Supports synchronization when used with compatible System Sensor modules.
- Selectable Sounder Output: Provides adjustable low frequency tone configuration.
The HW-LF delivers the reliability and precision required for low frequency fire alarm notification and sleeping area safety applications.
Description
The System Sensor HW-LF is a SpectrAlert Advance low frequency sounder designed for wall or ceiling installation in fire alarm notification systems. It provides a 520 Hz ±10% square wave tone required for sleeping area applications while supporting flexible 12/24V operation and simplified installation.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | System Sensor |
| Category | Fire Alarm Systems |
| Part Number | HW-LF |
| Subcategory | Low Frequency Sounder |
| Series | SpectrAlert Advance |
| Product Type | Low Frequency Fire Alarm Sounder |
| Device Color | White |
| Mounting Type | Wall or Ceiling Mount |
| Operating Voltage | 12/24V |
| Circuit Type | Two-Wire Notification Appliance Circuit |
| Sound Output Frequency | 520 Hz ±10% Square Wave Tone |
| Application | Sleeping areas, residential, commercial, and institutional fire alarm systems |
| Tone Type | Low Frequency Audible Notification |
| Installation Design | Plug-in mounting system |
| Mounting Plate | Universal mounting plate included |
| Wiring Feature | Shorting spring for continuity testing |
| Synchronization | Compatible with MDL3 Sync Module |
| Compatibility | Legacy SpectrAlert devices |
| Construction | Tamper-resistant housing |
| Listings | UL S4011, FM 3047563, MEA452-05-E, CSFM 7135-1653:0223 / 7125-1653:0224 |
| Weight | Approximately 1.0 lb (0.45 kg) |
Information About HW-LF
The HW-LF is part of the System Sensor SpectrAlert Advance low frequency notification appliance family developed to meet NFPA 72 requirements for sleeping spaces. The two-wire sounder produces a low frequency 520 Hz square wave tone designed to improve occupant alerting in residential and similar protected areas. Its plug-in design, universal mounting plate, and wiring continuity testing features help reduce installation time and minimize field wiring issues. The appliance is suitable for commercial, institutional, healthcare, and residential fire alarm systems requiring compliant low frequency audible notification.
Key Features:
- Low Frequency Sound Output: Provides a 520 Hz ±10% square wave tone for sleeping area notification requirements.
- SpectrAlert Advance Series: Designed as part of System Sensor’s advanced fire alarm notification platform.
- Two-Wire Operation: Connects to compatible 12/24V notification appliance circuits.
- Wall and Ceiling Mounting: Supports flexible installation on either wall or ceiling surfaces.
- NFPA 72 Sleeping Space Compliance: Designed to meet low frequency notification requirements for protected sleeping areas.
- Plug-In Design: Simplifies installation with minimal intrusion into the electrical back box.
- Universal Mounting Plate: Allows easier installation and wiring preparation before device connection.
- Wiring Continuity Testing: Integrated shorting spring helps verify circuit wiring before installation.
- Tamper-Resistant Construction: Helps prevent unauthorized adjustments or interference.
- Legacy Compatibility: Electrically compatible with legacy SpectrAlert devices.
- MDL3 Sync Compatibility: Supports synchronization when used with compatible System Sensor modules.
- Selectable Sounder Output: Provides adjustable low frequency tone configuration.
The HW-LF delivers the reliability and precision required for low frequency fire alarm notification and sleeping area safety applications.