Ultrasonic sensor and its advantages for customers This method has several advantages, the first one is that it can detect objects without touching them so this technology relatively efficient in tough condition. Another feature which gives the ultrasonic sensor technology a leg up — it produces precise measurements dirty air, with smoke or other particlesfunction as an medium optical sensors should not able penetrate. One example is ultrasonic sensors, which are cheap and easy to retrofit into existing systems. That should cover an accurate answer at least for plenty of use-cases. Compared to the infrared sensor, however, ultrasonic sensors have a longer detection range so they are able to be used in more complex situations and scenes.