Fire detection and alarm systems for buildings - Specification for optical beam smoke detectors Ingestion-build-232773 Annex B (informative) Nephrops guide

Annex B (informative) Nephrops guide

4 Looking Around

2 Politica del sistema di gestione

Planning in detail

Fire detection and alarm systems for buildings - Specification for optical beam smoke detectors Ingestion-build-232773 Annex B (informative) Nephrops guideSummary BS 5839 5: 1988, a part of the BS 5839 series, specifies requirements, test methods and performance criteria for fire detectors utilizing attenuation of an optical beam for the detection of smoke aerosols. An optical beam detector may or may not include an external reflector but is distinct from a point detector in that there is no integral mechanical connection to define or adjust the optical path length. This specification covers beam