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