The D297 Long-range beam smoke detector (12V) is used in clear open structures. Arenas, atriums, auditoriums, ballrooms, churches, factories, museums, and warehouses are typical areas. Each detector consists of a transmitter, a receiver, and a remote indicator plate. The transmitter and receiver typically mount on the ceiling or high on walls or columns. They
provide an effective and unobtrusive means of supervising public areas for fire protection.