55000-019APO Conventional Flame Detector (IR3) [SIL2]55000 019APO Conventional Flame Detector (IR3) [SIL2] The Conventional Flame Detector (IR3) is designed for harsh environments in indoor applications. The detector has three sensors which respond to different IR wavelengths to discriminate between flames and spurious sources of radiation. Key Features: Class 1 sensitivity to EN 54 10 detects 0. 1m2 fire at 25m High optical interference immunity Selectable response speed Optical self test Low power