Sensor of ultrasonic waves is a sophisticated device that uses sound waves to detect and measure the distance to an object. Objects obstruction, liquid level detection, and measuring the thickness of materials are all performed by its control mechanism. The sensors are technically extremely advanced, and work at frequencies beyond the hearing range of human beings. This means that measurements taken can be relied upon as being accurate. Also, they are equipped with features such as automatic gain control and noise suppressors that allow excellent performance in a wide range of production environments. Ultrasonic sensors have many uses, from highprecision distance measurement in robotics to rearview parking aids for automobiles. They also serve various roles in detecting dangerous collisions between people and sensors on the road. In industry again applications range widely: process control measures such as thickness gauges; light-speed speed measurement of hot steel bars rolling through a plant's production lines--but we will stop here for now.