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Ultrasonic proximity switch is used to detect objects of different materials, shapes, colors or concentrations, with excellent accuracy, flexibility and reliability. Its application scope is very extensive. Whether it is a level measurement or a height measurement, whether it is a distance measurement or a bottling count, whether it is 2.5 cm or 10 m, a variety of different characteristics of the object can be detected. And can be solid, liquid, powder, or even transparent objects. The detection is independent of the surface properties. The surface can be rough or smooth, clean or dirty, wet or dry. The proximity switch sensor has a very strong structure and is not sensitive to dirt, ambient light or noise.