AccuTrak, VPE PRO-PLUS, Ultrasonic Leak Detector Pro-Plus KitKit Includes:VPE Leak Detector;Battery;Touch Probe;Waveguide;Sound Generator;Noise Blocking Headphones;Large Carry Case;Canvas Belt Pack.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.The AccuTrak VPE Pro-Plus Kit is our most comprehensive VPE Kit, for the serious technician who needs the maximum capability from an ultrasonic instrument. The VPE Pro-Plus Kit includes the upgraded professional Noise Cancelling Headphones PLUS the powerful Burst Tone Sound Generator, in the larger case to keep everything together.The VPE Pro-Plus Kit offers unrivaled functionality and versatility for a fraction of the cost of any competitive system with similar performance. Find any kind of leak, troubleshoot internal mechanical problems, find bad gaskets and door seals – and do it all well, in any environment! If you do a variety of work and need a cost effective professional kit that can do it all, the Superior AccuTrak VPE Pro-Plus Kit is for you.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 and then zero in on the exact location of the leak.Capabilities:Capable of detecting a 5 psi leak out of a 0.005" (5/1000 inch) hole, 20 to 30 feet away depending on background noise.Easily detects any gas that generates ultrasonic sound during flow - including vacuum leaks.Capable of detecting leaks equivalent to 1.5 oz/year of Refrigerant.Works equally well for compressed Air or Nitrogen.Not affected by wind or high concentrations of leaked gas or refrigerant.AccuTrak VPE Advantages Versus Sniffers:Is a much more accurate and reliable instrument for detecting single and multiple leaks.Can detect any type of refrigerant gas including nitrogen.Detects both vacuum and pressure leaks.Is effective in gas saturated areas and under windy conditions.Does not require the introduction of tracer gases into the system, which can be ozone depleting when vented and can also be harmful to ones health.Is battery powered for cordless operation.AccuTrak VPE Advantages versus other Ultrasonic Leak Detectors:Is #1 in technology. We wrote the book on ultrasonic leak detection, our patented instruments lead the industry!Is the original! it is not a copy.Is the most durable unit available, with the best warranty. The face of the unit is sealed with no pin holes/speakers for foreign objects to enter.Has more dynamic range and wont overload in loud areas.Gives true audio sound reproduction instead of the "beeps and squeals" of other instruments.