The new PATROL Model PA 1 100 db industrial sounder from Pfannenberg fulfills numerous requirements for alerting individuals of hazardous situations or production problems in factories. By electronically generating acoustic tones (no moving parts), reliability is one of the greatest benefits, according to the manufacturer. Mechanically, the housing is manufactured from a blend of polycarbonate and ABS for durability and is offered in red, gray or white to meet application requirements and building decor. Also, the unit splits into two pieces for ease of installation. The base portion facilitates all wiring connections so installation is straightforward requiring only one person. Redundant contacts are provided for daisy-chaining of multiple units. The cover, with integrated sound capsule, is neatly fitted to the base through fail-safe guides to ensure proper mechanical and electrical engagement. The cover secures quickly with 3/8-turn captive fasteners that cannot get dropped or lost and incorporates a molded, captive gasket to ensure a positive IP 66 rated seal against dust and liquids.