CircleSafe® Aerosols Fluorescent CircleSafe® 778A and CircleSafe® 800A fluorescent aerosols with yellow-green particles, its ultra-bright, ultra-sensitive particles allow for excellent detection. CircleSafe® 800A Posted in: CircleSafe® Aerosols, Fluorescent CircleSafe® 778A Posted in: CircleSafe® Aerosols, Fluorescent