Smoke detector

Abstract

The problem is to reduce the possibility of missing non-fire alarms or fire detections due to insect intrusion. The solution is that the smoke sensor has a base plate (1). The base plate (1) has a cylindrical wall (103) that forms a smoke detection space and ribs (105) that are connected at both ends to the outer side of the cylindrical wall (103) and form a light-receiving space between the ribs and the outer side. A substrate is arranged substantially parallel to the base plate (1). The substrate has its ends abutting against the outer side and covering the light-receiving space. The ribs (105) extend from the lower surface of the base plate (1) toward the substrate to prevent insects from entering the light-receiving space.

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