Photoelectric sensors (photocells) are those who respond to the change in the intensity of light, allowing the activation or deactivation of a signal depending on the values received from that light. Photocells modulated light emitting and receiving the reflected light from the detected objects. It can detect objects and also distinguish colors, depending on the intensity of the light signals received. Idealfor production chains, as well as detecting objects, it detects its colors, shapes, textures, etc.