1592953402000 1312632483000 term-49081 1616541449603 1312632543000 1616290373974 adlib fitz-online adlib-term-49081 bc34bd69-823c-3d9b-8416-c9871bab49d1 2 1 scope note Smoke detectors that work by detecting the obscuration of light by smoke. reference term-49080 adlib-term-49080 6288292c-4305-3c83-aa3f-1ff2ac594cf6 photoelectric smoke detector V.PJ.AFU.ALO.AFU.BCW.AFU.ARI.ALO 1 code V.PJ.AFU.ALO.AFU.BCW.AFU.ARI.ALO 1 photoelectric smoke detectors reference term-49074 adlib-term-49074 3dd198fb-aa7f-3b58-8b25-a517d553e4eb smoke detectors photoelectric smoke detectors term