Prismatic reflectors for DOP-40, DOP-40R Purpose: The set of prismatic reflectors E39-R8 prismatic reflector are designed for operation together with beam smoke detectors DOP-40 and DOP-40R. Co-operation: Detectors DOP-40 and DOP-40R Technical data: - operation distance range(for E39-R8 reflector) 5 to 50 m