The ultrasonic flaw detector is a device meant for identifying and examining flaws in materials. It uses short wavelength ultrasonic waves to detect internal flaws such as cracks, voids, and discontinuities in a tested material. There are many synonyms for the ultrasonic flaw detector, such as ultrasonic flaw meter, ultrasonic flaw gauge, ultrasonic flaw testing device, and ultrasonic flaw scanner. These devices are widely used in numerous industries, including aerospace, manufacturing, and automotive, to ensure the quality and integrity of materials being used. Regardless of the synonym used, the ultrasonic flaw detector's primary purpose remains the same: detecting flaws to prevent accidents and ensure safety.