This combined is certified for use in Atex explosive atmosphere, zone 1 & 2 for gas and zone 21 & 22 for dust. It is dedicated for Oil & Gas, chemical, petrochemical, pharmacy industries, marine and Offshore applications. It’s designed for corrosive environnements and hazardous area. This sounder, according to user control system, can be set with one tone among 59 prerecorded tones. The beacon can be delivered with two different light sources; LED with steady, rotary, fixed or blinking led of different powers. Flashing with XENON tube of different powers. Four flashing frequencies are selectable. Optional it is possible to control the beacon and the sounder or separately via a telephone line. Possibilty to mix functions as manual call point, push button, junction box... Housing and mounting plate are made of stainless steel 316L .