Superior AccuTrak® Instruments are non-invasive leak detectors that can detect both pressure and vacuum leaks of ANY GAS. AccuTrak® leak detectors receive the ultrasonic sound that escapes from a leak point, processes it, and displays its strength. The larger the leak, typically the higher the indication will be on the instrument. In addition to the display, AccuTrak® instruments also produce an audio reproduction of the leak sound. The intensity of the audio will change proportionally to the display. This is why when you use AccuTrak®, you can see the leak, and also hear the leak. This allows you to easily identify leaks, distinguish them from other sources of ultrasound, and then quickly pinpoint the exact location of the leak.