There are many reasons why ultrasonic measurement is both practical and valuable for customers. Types of things it can measure include distance, position and displacement. Therefore, nondestructive testi the technique of ultrasonics, no damage is done to any material or structure undergoing inspection. This saves on repair and replacement costs in particular for non-metal buildings where not both techniques would be applicable. The result is an ultra-highly accurate and efficient detection of defects. Ultrasonic measurement can provide quick results without significant waiting times or potential errors due to human factors like boredom or tiredness interfering with their tests. In addition, ultrasonic waves can penetrate most materials: metals, plastics, composites and so forth making this form of testing also highly flexible. Such equipment for ultrasonic measurement is portable and easy to operate, so it can easily be taken along on inspection tours. It can also help quickly explain results from remote inspections－-a function similar to the black box flight recorder on an airplane but at lower cost and with greater flexibility. Lastly, this method can find internal and external defects which may not be visible to the eye. That helps ensure safety and reduce risk of component failure during operation.