This European Standard specifies requirements, test methods and performance criteria for line smoke detectors utilising the attenuation and/ or changes in attenuation of an optical beam, for use in fire detection systems installed in buildings.
This European Standard does not cover:
¾ Line smoke detectors designed to operate with separations between opposed components of less than 1 m

¾ Line smoke detectors whose optical path length is defined or adjusted by an integral mechanical connection

Line smoke detectors with special characteristics, which cannot be assessed by the test methods in this European Standard.