Ultrasonic detection is used for verifying system tightness of all sorts of installations from compressed air lines to the vehicles we drive and the ships that transport our goods from port to port. The principle is simple. A system under pressure or vacuum, that is not tight, will produce turbulent flow at the leak site. Turbulent flow can be heard and pinpointed with an ultrasound detector regardless of ambient background noise from the engine itself. If the system is not under pressure then artificial ultrasound is introduced which can also be detected at the leak sites with an SDT170 detector.

Leaks in the air intake system of diesel engines can cause expensive and premature failure. In some cases these engines exceed half a million dollars, and this does not speak to the cost of the downtime and redundancy.