Find Compressed Air Leaks Fast & Easy with Ultrasound

Compressed air leak detection is the process of locating and documenting air escaping from a pressurized compressed air system. Using ultrasonic leak detection tools, technicians scan piping, fittings, hoses, regulators, and more, while the system is operating and under pressure to identify and quantify leaks.

Ultrasound enhances one of our core senses, hearing. Rather than relying on the human ear alone, ultrasonic leak detection equipment filters out unwanted plant noise and allows technicians to focus on the high-frequency turbulence created when compressed air escapes through a leak.

Through a process called heterodyning, ultrasonic signals are converted into audible sound, allowing technicians to hear, locate, and evaluate leaks that would otherwise go unnoticed. Some instruments, such as the SonaVu Acoustic Imaging Camera, can also visualize ultrasound, allowing technicians to see the exact location of leaks while scanning large areas from a distance.

Compressed air leaks are easy to ignore because they rarely create an immediate problem. Unlike water or oil leaks, they don’t leave a puddle on the floor, create a noticeable smell, or typically present an immediate safety hazard. Since they are often invisible and difficult to hear in a noisy plant, maintenance teams naturally prioritize equipment failures, production issues, and safety concerns instead.

Without dedicated tools, scheduled inspections, or an established leak management program, compressed air leaks can continue wasting energy for months or even years before they’re discovered.

Yes. In fact, compressed air leak detection can only be performed while the system is pressurized. Without pressure, there is no escaping air and therefore no ultrasonic turbulence to detect.

Ultrasound inspections are routinely performed while equipment remains in normal operation, allowing technicians to inspect compressed air systems without interrupting production. As with any maintenance activity, inspections should always be performed safely and in accordance with plant safety procedures.

Before an initial compressed air leak inspection, especially if it’s been a while since the Laos compressed air leak survey, it’s common for industrial facilities to be losing 30 to 40% of their compressed air leak supply to leaks.

Depending on the size of the system and local electricity costs, the savings from a compressed air leak survey can represent 10s of thousands or even hundreds of thousands of dollars in energy waste on an annual basis.

This impact does go beyond electricity costs. Excessive compressed air leaks force compressors to run longer, which increases equipment load, reduces available system pressure, and can affect production if pneumatic equipment lacks sufficient pressure.

Yes. Acoustic imaging cameras are specifically designed for applications such as compressed air leak detection.

Unlike a traditional ultrasound sensor, which detects sound within its field of view, acoustic imaging cameras use large arrays of digital MEMS microphones to precisely locate and visualize ultrasonic sound. This allows technicians to quickly scan large areas, inspect overhead piping, locate leaks from significant distances, and pinpoint the exact source of a leak with confidence.

Their speed, ease of use, and ability to visualize ultrasound make acoustic imaging cameras one of the fastest ways to perform plant-wide leak surveys.

Yes, but detection depends more on airflow than simply pressure or hole size.

Ultrasound detects the high-frequency turbulence created by escaping compressed air. Very small leaks under sufficient pressure typically produce turbulent flow that ultrasound detects extremely well. However, when airflow becomes extremely low and transitions toward laminar flow, very little ultrasonic energy is generated, making detection less reliable.

For the vast majority of industrial compressed air leaks, ultrasound provides fast, accurate detection.

Leaks are typically prioritized based on estimated energy loss, repair effort, accessibility, safety considerations, and operational impact. SDT Ultrasound Solutions offer several tools like the LEAKReporter App and SonaVu InSights That help leak detection teams communicate and prioritize leak repairs.

Yes. Ultrasound detects the turbulence created when pressurized gas escapes through a leak, not the gas itself.

In addition to compressed air, ultrasound can detect leaks in nitrogen, oxygen, argon, carbon dioxide, steam, vacuum systems, and many other industrial gases, provided sufficient turbulent flow is generated.

Compressed air leaks most commonly occur at quick couplers, threaded fittings, push-to-connect fittings, flexible hoses, pressure regulators, FRLs, automatic drain traps, point-of-use connections, and compressor outlet valves.

These components experience constant vibration, pressure cycling, movement, and wear, making them the most common sources of compressed air leakage.

That depends almost entirely on how quickly identified leaks are repaired. However, it is common to identify enough wasted compressed air during only a few hours of surveying to justify the cost of the inspection, or even the purchase of an ultrasonic leak detector.

Once the highest-priority leaks are repaired, many facilities begin realizing measurable energy savings almost immediately.

Absolutely. Compressed air leak detection has one of the lowest barriers to entry of any predictive maintenance technology while often delivering one of the fastest returns on investment.

With the right ultrasound equipment and proper training, most facilities can successfully perform leak surveys in-house. For many plants, a single technician inspecting the compressed air system once or twice each year is enough to maintain an effective leak management program.

Organizations starting a new program often benefit from consulting with an experienced reliability specialist to determine inspection frequency, reporting methods, and the overall inspection strategy.

Yes. Compressed air systems are constantly changing as fittings loosen, hoses age, components wear, and maintenance activities introduce new opportunities for leakage.

One of the most important times to perform a leak survey is immediately after equipment has been installed, repaired, or modified, since this is often when new leaks are introduced. Routine inspections ensure previous repairs remain effective while identifying new leaks before they become costly.

Inspection frequency depends on how critical compressed air is to your operation, how dependent production is on consistent system pressure, and the cost of wasted energy.

For many facilities, inspecting every six months provides an excellent balance between inspection effort and energy savings. Annual surveys are still beneficial, but waiting longer than a year often allows unnecessary leakage and operating costs to accumulate.

Yes. Ultrasound operates above the range of normal human hearing, allowing technicians to focus on high-frequency sound that is unaffected by most audible plant noise.

Through heterodyning, ultrasonic signals are converted into sounds technicians can easily recognize, making it possible to locate compressed air leaks even while nearby machinery is operating.

Finding a leak is only part of the process. Verifying repairs confirms the leak has actually been eliminated and that the expected energy savings have been achieved.

A quick follow-up inspection with ultrasound also identifies incomplete repairs or new leaks that may have been introduced during maintenance, helping maintenance teams close the loop on their leak management program.

Yes. As leakage increases, compressors must work harder to maintain system pressure. If compressor capacity can no longer keep up with demand, pressure begins to fall, reducing the performance of pneumatic tools, cylinders, actuators, and production equipment.

Many facilities respond by increasing compressor pressure or adding compressor capacity when repairing leaks would solve the underlying problem.