This is the standard model of NAUT21 (Non contact Air coupled Ultrasonic Testing).
Ultrasonic air transducer scans horizontally against the object.

This is the ultrasonic inspection system that uses the technology called Non contact Air coupled Ultrasonic Testing (NAUT).
NAUT realizes ultrasonic inspection/measurement in the air without contact.

The first commemorative equipment was shipped to JAXA (Japan Aerospace Exploration Agency). In JAXA, it is used for inspection of carbon fiber reinforced plastic (CFRP) in aerospace field.