The Intelligent Reflective Beam detector:   is loop-powered is compatible with XP95 and Discovery incorporates a short-circuit isolator has automatic drift compensation has an automatic reset function following clearance of an alarm or fault condition

The Intelligent Reflective Beam Detector differs from a traditional beam detector in that it is a single unit comprising a transmitter, a receiver and control electronics. The transmitter projects a cone-shaped beam of modulated infra-red light to a reflector (prism). The reflector returns the beam to the detector where the receiver measures the amount of light received and converts it to a signal for processing in the control electronics.

The beam detector is available in two versions: a single reflector model for distances of 50m and a four-reflector unit for distances of 100m.