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55X Explosion-Proof
Resonating Horn


This Federal Signal explosion-proof resonating horn is constructed for safe use in hazardous environments. It is enclosed in a heavy-duty die cast aluminum housing which is tapped for 3/4–inch conduit.

Federal Signal Model 55X is a resonating electric horn which produces sound by means of a diaphragm which resonates a column of air. The Model 55X is available in 120VAC.

The 55X is UL Listed for Class I, Division 1, Groups C & D; Class I, Division 2, Groups C & D; Class II, Division 1, Groups E, F & G; and Class III. A five minute duty cycle applies.

This resonating explosion–proof horn is designed for locations where the danger of explosion or fire exists, such as refineries, laboratories, mines and grain elevators.


  • Corrosion–resistant cast aluminum housing
  • Produces 105dBa @ 10' (115dBa @ 1m)
  • Type 4X, IP66 enclosure
  • UL and cUL Listed, CSA Certified

    pdfDownload the 55X Explosion-Proof Resonating Horn Datasheet in PDF format

    pdfDownload the 55X Explosion-Proof Resonating Horn Instruction Sheet in PDF format