We offer Acoustic Signalers suitable for hazardous areas Zone I and Zone 21 to give Emergency warning signal (EWS) sounds for improved safety of railroad workers and warn trespassers. Our specialized Acoustic Signalers are specific for potentially explosive atmospheres (chemical plants and refineries, pumping stations, painting plants, silos) and/or anywhere there may be the presence of dust. The particularly tiny dimensions and possibility of fastening by bracket in four different positions ( at 90° along the longitudinal axis) allows the maximum installation flexibility. These acoustic signalers operate with a sound density of 120dB and are provided with IP66 degree of protection.