The Gas Leak Detector is used to locate leaks on compressed air lines. Furthermore, the Gas Leak Detector can also be used on coolant lines or gas lines for leak detection. The Gas Leak Detector is equipped with an ultrasonic sensor that can precisely detect leaks in air lines. The ultrasound sensor from the Gas Leak Detector works at a frequency of 40 kHz. This means that the Gas Leak Detector is calibrated to the medium frequency that leaks on pressure lines emit. This is in the range between 20 ... 80 kHz. A high-pass filter in the leak detector ensures that all noises are filtered at a frequency <40 kHz in order to perform a better leak detection. An integrated amplifier element in the leak detector ensures that the high-frequency tones,