The Clifford & Snell 8491 Series are audio Signalling Devices that are designed to warn, call and indicate hazardous areas. The Horn has a max. sound level of 105dB(A) at 1 metre.
The Clifford & Snell 8491/1 can be used in Zone 1 and Zone 2 areas, while the 8491/2 can be used in Zone 1, Zone 2, Zone 21 and Zone 22 areas.