SDT devices used in predictive maintenance detect the ultrasonic sound generated by the effect of friction, tapping and turbulence. The device detects only sounds above 20 kHz and eliminates sounds below this limit, reducing the range of sounds that the human ear cannot hear to the frequency range that the human ear can hear with a specially developed system. In this way, it is also used in the control of bearings, acoustic lubrication, leakage tests, steam traps and valves in the control of electrical problems such as arc, tracking and corona and in mechanical applications.

© CFU international 2018