Mitsubishi Heavy Industries, Ltd. (MHI) has developed a thin-film ultrasonic testing (UT)
sensor, which is thin, flexible and usable at high temperatures. The thin-film UT sensor can be used
for continuous monitoring during operation or as an alternative to a conventional UT sensor in
measuring the thickness of plant piping and vessel. This paper describes our thin-film UT sensor in
terms of its characteristics and performance, research for usability expansion and application in
the inspection of actual units.
