Visible SMOKE DETECTOR BS-655/12 12VDC BASED OLYMPIA ELECTRONICS

Optical smoke detector BS-655/12 12VDC basis of OLYMPIA ELECTRONICS. 

Detectors (BS-655/12, BS-660/12 BS-668/12) was constructed to provide 

quick detection in case of fire. They consist of 2 parts, a plastic 

base mounted on the ceiling, and the main body of the detector snaps 

the plastic base with a simple clockwise rotation.