The XAL Hazardous Location Fire Alarm Pull Station is activated by lifting the front cover and pulling down the ring. This quick, easy to use two-step process prevents unintentional operation. Unit is reset by depressing shaft and returning plate to original position.Suitable for hazardous locations where flammable gases or vapors,combustible dusts or easily ignitable fibers or flyings are present.Ideal for installation at petroleum refineries, chemical and petrochemical plants, storage areas, and other processing facilities where hazardous substances are handled or stored. Used in areas where emergency control of fire alarm or signal circuits is required.