BS 5839-5 88th Edition, March 31, 1988
Fire Detection and Alarm Systems in Buildings - Part 5: Optical Beam Smoke Detectors
Includes all amendments and changes through Reaffirmation Notice , February 25, 1998
Additional Comments: W/D NO S/S
Published By:British Standards Institution (BSI)
Requirements, methods of test and performance criteria for detectors with ranges between 1 m and 100 m.