Acoustic signaling equipment includes electronic sounders such as multi-tone sirens and piezo buzzers, as well as electromechanical sounders such as horns and bells. Generally speaking, what differentiates one piece of acoustic signaling equipment from another is its volume, tone and frequency.
Explosion-proof signaling equipment, also known as Ex signaling equipment or ATEX equipment, provides protection against ignition or explosion in the event that a piece of signaling equipment misfires. It is used in industrial atmospheres that are highly flammable, combustible or at risk of explosion. Ex signaling equipment certification; ATEX classification.