System Sensor PC2WL-LF


Low Frequency Sounder Strobe, Ceiling

Availability: In Stock

Condition: New
Brand: System Sensor
Status: Active
SKU: 56175
Manufacturer Part #: PC2WL-LF


The L-Series offers the most versatile and easy-to-use line of low frequency sounder and low frequency sounder strobes in the industry. With white and red plastic housings, listed for wall and ceiling mounting, L-Series Low Frequency can meet virtually any application requirement.

The low frequency sounder and 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.

Additional information

Weight 1.2 lbs
Dimensions 2.80 × 6.80 × 6.80 in


Lens Color












Production Status



  • 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


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Indoor Selectable-Output Low Frequency Sounders and Low Frequency Sounder Strobes


System Sensor - Data Sheet