One of the practical advantages for photoelectric sensors is that it can detect objects without contact. First, it obviates the matter of wear and tear: endurance is high; maintenance better be. One more thing which favor high speed application is the response time of photoelectric sensors are very fast…(Photo sensor has to be highly responsive otherwise it will affect accuracy. One more you should learn about this important piece of information is that photoelectric sensors are versatile. They work well with a wide range of materials, be they transparent or opaque and colored black(ish) as is so often the case(materials like e.g., to detect clear flip-flop states). Finally, they are very cheap and energy efficient. This helps in reducing operational costs. They also have integrations on their designs with your existing systems. This renders the update process simpler, and manageable — which in turns ensures a much better operation of restopus.