This document provides information on the YA90 flameproof audible signal, which produces 115 dB of sound. It has an IP66 rated enclosure that is suitable for hazardous environments. It has selectable tones and alarm stages, and can be used with voltages of 24V DC, 48V DC, 115V AC, and 230V AC. Accessories like cable glands for armored and unarmored cables are also available.