Optical dust detector assembly for use in an automotive vehicle

摘要: An optical dust detector assembly includes an air duct member having introductory portion and a base for permitting flow of passing therethrough, the pair radial holes formed in its peripheral wall, cylindrical casings secured to wall at both sides thereof respective opening ends communicating with interior through thereof, light emission element arranged within one emit beam pass it toward other casing, receiving casing receive emitted from passed holes. The is bent such manner as form therein inclined internal surface deflecting upwardly introduced portion, are face deflected by so that foreign particles like rain or snow not upward detector.