The low frequency sounder strobes were 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.

Like the entire L-Series product line they include a variety of features that increase their application versatility while simplifying installation. All 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. To further simplify installation and protect devices from construction damage, L-Series uses a universal mounting plate with an onboard shorting spring, so installers can test wiring continuity before the device is installed.

Main Features

• 520 Hz ± 10% square wave tone, NFPA compliance
• Full candela range plus High/Low tone options to optimize current draw for a wide variety of applications
• Compact, standard, and round ceiling options
• Field-selectable candela settings. Wall units: 15, 30, 75, 95, 110, 135, and 185. Ceiling units: 15, 30, 75, 95, 115, 150, and 177
• Rotary switch for High/Low, Temp3, Temp4, and Continuous settings. Sounder-only models also offer a Coded setting.
• Plug-in design with minimal intrusion into the back box
• Mounting plate shorting spring checks wiring continuity before device installation
• Electrically compatible with legacy SpectrAlert and SpectrAlert Advance devices (Direct replacement for HW/R-LF and P2R/WH-LF)
• Compatible with MDL3 sync module
• Sounders listed for ceiling and wall
• Round Sounder Strobes listed for ceiling and wall
• Updated modern aesthetics