Description
System Sensor P4WL White Horn Strobe
The System Sensor P4WL is a 4-wire, wall-mount horn-strobe (“audible + visual”) notification appliance marked “FIRE” in a white housing. It belongs to the L-Series line which prioritises modern aesthetics, lower current draw, flexible configuration, and easy installation.
Key Features & Benefits
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Field-selectable candela settings on wall units: 15, 30, 75, 95, 110, 135 and 185 cd.
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Automatic selection of 12- or 24-volt operation at the 15 and 30 candela settings.
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Plug-in design with minimal intrusion into the backbox; universal mounting plate with an onboard shorting spring to check wiring continuity before device installation.
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Tamper-resistant construction.
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Horn selectable tone and volume: Rotary switch selects horn mode (continuous / temporal) and 2 volume levels.
Typical Specifications
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Model: P4WL (white wall-mount, “FIRE” legend)
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Mounting: Indoor, wall mount
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Finish / Colour: White housing, “FIRE” legend
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Operating Voltage: 8 – 17.5 V (12 V nominal) or 16 – 33 V (24 V nominal) when used with sync module.
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Strobe Flash Rate: ~1 flash per second (typical)
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Dimensions (Wall): Width ~4.7″, Depth ~2.5″.
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Field-Selectable Candela Settings: 15 / 30 / 75 / 95 / 110 / 135 / 185 cd.
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Listed Standards: Horn to UL 464; strobe to UL 1638 (via L-Series documentation).





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