The U-shaped photoelectric switch is a sensor. This sophisticated sensor is designed to improve precision and reliability in detecting objects under various conditions. Its main function is to produce an invisible infrared light beam and detect when the beam is interrupted by an object moving along its trajectory. With a U-shaped light path, it's possible to achieve both the widest possible range of detection and the most precise targeting compared to traditional photoelectric switches. It is built into vehicles door switches under current technology, which contributes not only a more fashionable touch but also decreases the likelihood of switch damage due to the misuse. Technological features include adjustable sensitivity, durable design for bad environments, and compatibility with all types of control systems. Possible applications include automatically detected doors on parking lots and assembly lines; security systems such as closed-circuit television systems in cities as well rural areas for farm overlooks; and monitoring traffic signals from many cities throughout the United States--some with up to 99% accuracy.