PQWT-CL pipe leak detector is a professional water leak detection device for water companies, heating companies, municipal companies, and construction companies. They are mainly used to find and determine the location of water leakage points of water supply pipelines, and they can also be used to detect leakages in other pressure piping systems. When the fluid in the pipeline erupts through a leakage source due to pressure, the noise produced by the impact on the internal wall will spread along the pipeline or along the buried layer medium to the ground. This device determines the leakage source through the amplification of leakage noise and analyzing the spectrum signal.