What are the demerits of the typical ultrasonic flaw detector?
Demerits of a typical ultrasonic flaw detector:
a. Both the sides of the specimen are needed for the study.
b. Both the sides of the wall to be studied require being parallel.
c. As two different probes are utilized for transmission and reception coupling loss is maximised.
d. Simply the presence of the defect is revealed. The depth of it is not made known.