Model 252 back-up alarm is a solid state audible warning device enclosed in a weatherproof housing. The alarm produces a horn tone of 97 dBa @ 4 feet and sounds at approximately 60 times per minute with equal on and off pulses. Model 252 conforms to SAE (Society of Automotive Engineers) J994 Sound Level Type C.
Federal Signal’s Model 252 housing is constructed of black glass-reinforced plastic and comes equipped with universal mountings for easy installation. When properly installed, this unit is weatherproof, dust-proof and not adversely affected by the steam cleaning of vehicles.
Model 252 is designed for use in a wide variety of vehicles that operate in populated areas — both indoors and out. This alarm is ideal for use on forklifts, tractors, waste disposal vehicles, dump trucks, earth moving equipment or any other vehicle that operates near people.
Federal Signal’s Model 252 Vehicular Back-up Alarm is an economical life-safety device designed to prevent accidents.


Voltage 12-48VDC
Mount Universal
Operating Current 0.20 Amps
Operating Temperature Minimum -40 °F
Operating Temperature Maximum 167 °F
Height 2.630 in
Width 4.000 in
Depth 1.630 in


Product Literature
Product Manuals

Ordering Information

Model Types
Model Description UPC
252-012-048 Back-up alarm, 12-48VDC 782979289005