AccuTrak, VPE-2000, Digital Ultrasonic Leak DetectorIncludes:Instrument;Headset;Contact probe extension kit;Hard carrying case;Protective canvas pouch with vinyl window;Batteries;Manual and video overview.Features:Digital LED Indicators (Alphanumeric and bar-graph);Digital Frequency Selection (With SONIC Probe Mode);Digital PEAK HOLD Feature;Separate Volume and Sensitivity;Digital Mode Selection;Stores all Settings in Memory;Wide Dynamic Range (256 Steps);Field Calibratable (With purchase of Calibrator).Applications:Leak Detection: Air, Vacuum, Refrigerants; ANY GAS!Steam Traps: Detect live steam loss in seconds!Valves: Detect/hear internal leakage incheck, ball, needle, gate or any type of valve! Diagnose thermal expansion valves in just five minutes!Bearings: Hear wear and lubrication problems before damage is done!Electric Arc and Corona: Inspect circuit breakers, relays and buss bars! Check for corrosion on contacts and proper insulation!Pneumatics and Hydraulics: Inspect controls, hoses, tools, fittings and internal cylinders with ease!Vibration: Detect the ultrasonic sound generated by excessive friction!Fan Belts.The VPE-2000 is perfect for schools, hospitals, hotels, factories and other large institutional or industrial environments. The VPE-2000 Ultrasonic Leak Detector is ideal for a variety of leak detection applications and plant maintenance applications.The Superior AccuTrak VPE-2000 is the first digitally controlled ultrasonic detector. Like two instruments in one it uses two independent sensors supported by separate electronic circuits configured specifically to their own sensor. This assures optimum sound clarity and frequency response. When switching between the airborne and contact sensors all settings are retained in memory! Digital LED meters let you establish baselines, perform trending and accurately repeat these tests better than older more expensive analog instruments.