Tomar Model 490S-T hazardous location strobes are UL listed for use in Class I and II, Division 2 locations. The 490S-T features a hermetically O-ring sealed Lexan lens, and polyurethane potted power supply for complete protection from moisture. This unit is UL NEMA 4X rated, and may be operated in any position. The high efficiency, solid state power supply is polarityprotected and utilizes built-in filters to guard against radio interference and spike voltages. These warning lights are ideally suited for installations in chemical and petrochemical processing facilities, sewage treatment plants, off-shore and dockside installations, as well as agricultural, commercial, industrial, mining and marine facilities.