508-128 High-Powered Outdoor Siren

508-128 High-Powered Outdoor Siren

  • High-powered rotating siren for maximum coverage
  • 500 Hz, 128 dB(C) output
  • Three distinct warning signals
  • AC or Solar powered with battery operation or back-up
  • Weather-resistant coating

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Federal Signal’s 508-128 siren is a high power, rotating, uni-directional, 500 Hz outdoor warning siren that offers an anechoic chamber-certified signal strength of 128 dB(C). The high-decibel output provides maximum coverage with minimum installation cost. Radio activation can further minimize installation costs by eliminating the need for leased dedicated control lines.

The siren rotates at 3 RPM and can produce three distinct warning signals: steady, wail and fast wail. The 508-128 siren will supply a minimum of 15 minutes of full power output from its batteries after AC power loss. The siren controls are available with battery operation, Solar AC operation, and AC operation with battery back-up, one-way and two-way radio control, wired or wireless ethernet, satellite/cellular or landline.

Ideal applications for these warning sirens include hazardous weather conditions, fires, floods, chemical spills and other types of emergencies, the 508-128 siren is an excellent choice to protect any community.


Sirens can be powered from 120VAC, 240VAC, with battery back-up or battery operation. Solar powering can also be provided

70 dB
7,300' Calculated²
60 dB
14,700' Calculated²
Signal Information:3
Signal /Sweep Rate
Frequency Range
Sweep Rate
Steady /Continuous
500 Hz
Wail/10 sec.
180-500 Hz
10 sec.
Fast Wail /3.5 sec.
300-500 Hz
3.5 sec.

Pole Mounts:
Wood, steel, composite or concrete poles can be provided. Contact Federal Signal for details
Federal Signal can supply one-way and two-way communications. Radio, IP, Landline, Satellite and Cellular can be combined to provide a robust alerting solution
Operating Temperature:4   -22° F to 140° F (-30° C to 60° C) 
Dimensions: Height x Width x Depth:  70.1" x 53.4" x 43.1" (1780.5mm x 1356.4mm x 1094.7mm)
Shipping Weight:   590 lbs (268 kg)

1 Contact Federal Signal for powering options
2 Actual coverage is dependent on many factors, contact Federal Signal for sound analysis of your specific location
3 The siren can operate throughout this temperature range provided that battery temperature is maintained at 18° C or higher
4 Batteries not included

Ordering Info

Model Types
508-128-CRotating electro-mechanical siren 128dB, 48VDC, steel/concrete mount
508-128Rotating electro-mechanical siren 128 dB(C) +/- 1 dB(C), 48VDC, pole mount included
Replacement Parts
DC Battery charger, 48 Volt Upgrade Kit (replaces 4 Q8402B073C)Q-DCCHG1