When powerful performance is needed and budgets are limited, choose the versatile Superior AccuTrak® VPE-1000 Ultrasonic Leak Detector. It is the first low cost digital ultrasonic leak detector, offering extraordinary features at a fraction of the cost of other ultrasonic instruments. The versatile AccuTrak® VPE-1000 features separate ultra-sensitive sensors for both airborne and contact ultrasound. Extremely sensitive to the ultrasonic sound of leaks and friction in industrial systems, the VPE-1000 Ultrasonic Leak Detector uses a technique called "heterodyning" to translate ultrasound to a lower frequency which our ears can interpret.