Security sensor with built-in sight device

摘要

A security sensor equipped with a sighting device in which respective optical axes of a beam projector and a beam receiver can be adjusted easily and quickly. The beam receiver A includes an adjustment (50) for adjusting the optical axis, a mirror-equipped sighting device (C) having a viewing window (12) through which viewing is possible from a lateral side of the beam receiver (A), a light emitting element (8) and a mirror (14) accommodated therein for presenting an image of the beam projector (B), and a lamp control (6) for changing a status of the light emitting element (8) in correspondence with the amount of light received from the beam projector (B).