Principle
Turbulence created by gas or air forced through a small orifice generates ultrasonic sound. Ultrasonic sound occurs when the atmosphere leaks into a vacuum vessel or when a pressure vessel leaks to the outside atmosphere. Ultrasonic sound's frequency is related to the size of the orifice which ultrasonic sound passes through,but usually the frequency is about 40Hz. Ultrasonic sound is very directional, this directionality is
used to pinpoint the origin of the ultrasonic sound, the leak point.
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Zhangzhou Eastern technology Group was set up in1993.it is a "State High and New Technology Enterprise " Which specializes in research,manufacture and sales of test & measurement instrpment. the products are expoted to more than 70 countries word-wide,it is one of biggest manufacturers of test & measurement instruments ih China. It has undertaken more than 20 national &provincial projects, and obtained more than 100 national patents. It gets ahead in technology and products, and provides worldwide customers with cost-effective test & measurement instruments.
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