State-of-the-art AccuTrak® technology allows you to pinpoint leaks in air conditioning and refrigeration systems without changing tips or components. Detectors can easily find leaks of any type of refrigerant or gas, even as small as 1.5 oz. per year of refrigerant, or hear a 5 psi leak up to 30 ft away. Also allow you to hear the sound of a tiny leak clearly and distinguish it from other noises. Use the Touch Probe to hear internal ultrasound to quickly diagnose malfunctioning valves and bearings. Troubleshoot a TXV in just 5 min. Use the Sound Generator to artificially "sound pressurize" any enclosure or vessel to find leaks; ideal for refrigerator door seals.