When equipment begins to fail due to an air or gas leak or vibration, or electrical discharge, the leakage point emits an ultrasonic sound wave that is above the natural range of human hearing. The ULD-400-EUR Series Ultrasonic Leak Detectors convert this ultrasonic sound into a signal that can be used to pinpoint the exact location of the equipment failure. When working in unpressurized systems, or the pressure is not sufficient enough to detect or verify a leak with the Receiver alone, use the Transmitter to generate the ultrasonic signal (included with the ULD-420-EUR kit). 

• 20 kHz to 90 kHz frequency range: optimal range for detecting a variety of leakage events
• Three filters to remove main noise frequencies in noisy environments
• Adjustable receiver sensitivity and three transmitter signal strengths for accurate leak pinpointing
• Ideal for inspecting compressed air or other non-combustible gases, plumbing, electrical and mechanical systems, HVAC systems, etc.