Leak detector principle

In the process of mobile scanning, after the sensor detects the leakage signal, it is converted into an audio signal that can be heard by human ears and displayed on the screen at the same time. On the LCD screen, the leakage source is a real-time visual image of yellow (small leakage and weak signal) or red (large leakage and strong signal). At the same time, the effective value and maximum value of continuous sound decibel are displayed in different colors and values through the horizontal light column at the bottom of the LCD screen.