VPE Ultrasonic Leak Detector Basic Kit Kit Includes: VPE Leak Detector Headset Battery Hard Case The Patented Superior AccuTrak VPE represents state-of-the-art technology for pinpointing leaks is air conditioning and refrigeration systems. AccuTrak is extremely sensitive to the ultrasonic sound of a turbulent gas leak. Using a technology called "heterodyning" it translates the sound to a lower frequency which your ear can interpret. AccuTrak maintains the original sound characteristics making it possible to distinguish leaks from other competing background sounds. AccuTrak is so sensitive you can actually hear the blink of an eye, yet most background noise will not interfere with detection accuracy. Superior AccuTrak advanced patented technology has never been so affordable! The AccuTrak VPE Basic Kit is for technicians who require only the essentials to detect leaks using airborne ultrasound. As with all AccuTrak instruments, the VPE finds leaks for any kind of gas or refrigerant without changing tips or components. Works equally well to find compressed air leaks, nitrogen leaks - even vacuum leaks! AccuTrak can find leaks as small as the equivalent of 1.5 oz per year of refrigerant, or can hear a 5 psi leak up to 30 feet away. Applications: Leak Detection: Air, Vacuum, Refrigerants; ANY GAS! Steam Traps: Detect live steam loss in seconds! Valves: Detect/hear internal leakage in check, ball, needle, gate or any type of valve! Diagnose thermal expansion valves in just five minutes! Bearing Wear: Hear wear and lubrication problems before damage is done! Features: Audio Output: 0 Hz to 4 kHz Natural Sound conversion allows you to Hear the Leak, and distinguish leaks from mechanical or other background ultrasound. Visual Output: 10 element bar graph provides quick and intuitive visual indication to presence of and relative strength of ultrasound. Adjustable Sensitivity : Allows operator to quickly identify leaks from a distance.