Compact ultrasonic leak detector for air, water, gas and vacuum diagnosis. Key benefits Locates leaks quickly and accurately to reduce downtime, avoid equipment damage, and improve safety during maintenance and inspections. Portable, easy to handle design lets one technician perform fast diagnostics on vehicles, refrigeration systems, and industrial equipment. Directional sensing and adjustable sensitivity make pinpointing the source reliable even in noisy environments. Main features Ultrasonic response technology at 40 kHz ± 2 kHz for sensitive detection of turbulent noise from escaping fluids and gases. Compact, lightweight handheld design: 171 × 43 × 38 mm, 240 g — easy to carry and operate for extended inspections. Detects air, water, gas, and vacuum leaks plus pressurized gases including CFCs, HFCs, nitrogen, carbon dioxide, and steam. Also senses electrical arcing and failing components such as solenoids, valves, and bearings. User controls and outputs: adjustable sensitivity, LED alarm, audible ticking tone, and headphone output for focused listening and precise localization. Directional sensing mechanism: the 40 kHz frequency is directional and responds to turbulence from escaping gas; alarm intensity increases as the probe approaches the leak for accurate pinpointing. Practical applications Refrigeration and transport: find refrigerant leaks in refrigerated vehicles, cargo boxes, and refrigerated trucks to maintain cooling performance and regulatory compliance. Automotive and mechanical maintenance: test wheels, brake systems, bearings, and sealed components for air or vacuum leaks and failing mechanical parts. Industrial inspection and rail: inspect welding seams, doors, sealed spaces, and seals on speed rail cars for integrity and safety. What you get A straightforward, handheld diagnostic tool optimized for field use in automotive, industrial, and refrigeration system diagnostics, with the sensitivity, outputs, and directional response needed for fast, accurate leak detection.