Photoelectric Switches with Self-Contained Amplifier has effective light axis alignment, 50 % power savings and ensures prevention of accidental switch operation. The Photoelectric Switches has wide operating temperature range and no damage from any wiring error. The Photoelectric Switches have reduced operating error due to noise and error due to ambient light reduced. The Photoelectric Switches has various detection methods such as polarized retro reflective, thru-scan and diffuse-scan. The Photoelectric Switches have light on/ dark on option that is selectable by switch and has 500 µn; maximum response time for both operation and recovery. The Photoelectric Switches with Self-Contained Amplifier has red LED and infrared LED emitter.