Federal Signal’s Model FHEX Explosion-Proof Vibrating Horn produces a loud and distinctive tone by the electromechanical vibration of a diaphragm. This horn is designed for use in alarm notification systems and is compatible with fire alarm and suppression supervised control panels and power boosters.
The Model FHEX operates on 24VDC and produces a very loud 99 dBa @ 10' (109 dBa @ 1m).
Model FHEX is housed in a heavy duty, copper-free cast aluminum housing tapped for 3/4" conduit. The housing is sealed with red powder coat paint and utilizes a stainless steel diaphragm for long life.


Operating Temperature Range -31°F to 150°F
Net Weight 9 lb
Shipping Weight 10.30 lb
Height 7.630 in
Depth 6.500 in
Diameter 6.500 in

Ordering Information

Model Types
Model Description UPC
FHEX-24SMR Horn, explosion-proof, 4-wire, 24VDC, red 782979213789