The Miller Edge TruGuard monitored reflective photo optic system combines an emitter and receiver in the same housing. The reflector, equipped with hood for added sunlight immunity, returns the photo optic beam to the emitter/receiver unit. This system functions as a protective barrier guarding an entrapment or hazard zone. When an obstruction interrupts the invisible barrier, a signal is sent to motor controls to stop and/or reverse motion. A visible light beam eases alignment to the reflector making it easy to install.