WA-EUS-720 Leak Detector
Compressed Air Leak Detector WA-EUS-720
WA-EUS-720
ULTRASONIC LEAK DETECTOR
The Ultimate Tool for Leak Detection in Compressed Air & Inert Gases.
When leaks develop as a result of failed seals or internal components, they emit an ultrasonic sound wave that is above the natural range of human hearing. The WA-EUS-720 Series Ultrasonic Leak Detectors convert this ultrasonic sound by an electronic process called ‘heterodyning’ that accurately converts the ultrasounds sensed by the instrument into the range where users can hear the audible signal through a headphone. The high frequency, short wave characteristic of ultrasound enables users to accurately pinpoint the location of a leak or a particular sound in a machine.
WA-EUS- 720 ultrasonic leak detectors allow maintenance personnel to confirm a diagnosis on the spot by being able to clearly discriminate among various equipment sounds. The basic advantages of WA-EUS-720 ultrasonic leak detectors are that they can easily locate leaks, provide advanced warning of impending mechanical failure and can be used in loud, noisy environments.
The large LCD display bar graph displays the leaking intensity and converts the ultrasound frequencies to human audible range. When working in unpressurised systems, or if 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 WA-EUS-730 Kit). In extremely noisy environments where there is strong ultrasonic noise generated by running machinery or equipment, the Receiver’s filter function can filter out up to three main noise frequencies which would otherwise hide the noise of the leak.
Features :
- 2.5”LCD display with bar graph
- 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
- Quality Noise Cancellation headphones (Optional) to help identify the source of the leak
- Parabolic Dish to direct the ultrasound towards the sensor
- Detachable Tubular Extension provides additional reach in hard to reach areas
- CE marked in accordance with applicable EU Directives.
Declaration of Conformity available upon request.
Find Leaks Even in Noisy Environments :
In some situations, there might be strong ultrasonic noise generated by running machinery, motion sensors or other equipment. This noise will cause the Receiver to read the maximum signal strength of this noise interference on the display regardless of the sensitivity settings and make it unusable for detecting leaks. The Filter function was designed for these situations. Simply press the Filter button and the Receiver will automatically detect and filter out up to three main noise frequencies.
Visual and Audible Leak Pinpointing :
While scanning a target area with the Receiver’s ultrasonic microphone the displayed bar graph will indicate proximity to the source of the leak. Plug the headphones into the Receiver to audibly hear the leak and verify its source. For example, air leaks will produce more of a hissing sound while electric discharge manifests in a ticking sound.
- APPLICATIONS
- SPECIFICATIONS
- Leaks of Compressed air or other gases
- Plumbing
- Electrical and mechanical systems
- Valves, tanks and pipes
- Heat exchangers, boilers and condensers
- Air conditioning and refrigeration systems
- Motors and machinery
Related Case Studies & Blogs
Case Study: Reducing Costs in Your Compressed Air System
See how identifying and fixing compressed air leaks helped a plant save 500 CFM and reduce maintenance costs dramatically.
How Compressed Air Monitoring Pays for Itself
A real-world case study showing how leak detection and monitoring delivers measurable ROI in manufacturing.
The Power You Don't See
Understand the hidden energy costs of compressed air leaks and why smart monitoring is the future of efficiency.
Frequently Asked Questions
How does an ultrasonic leak detector find compressed air leaks?
Ultrasonic leak detectors like the WA-EUS-720 detect high-frequency sound waves generated by air escaping through leaks. These sounds are inaudible to humans but easily picked up by the sensor.
How much energy can you save by fixing compressed air leaks?
Studies show that 20-30% of compressed air is lost through leaks in a typical plant. Fixing leaks with regular detection using the WA-EUS-720 can reduce compressor energy costs by 15-25%.
How often should compressed air leak detection be performed?
Best practice recommends quarterly compressed air leak surveys. Regular detection and repair programs using ultrasonic detectors ensure ongoing energy savings and system efficiency.
Which WiseAir leak detector do you need?
All three instruments work on the same physics: air escaping a small opening under pressure creates turbulence, turbulence creates ultrasound above 20 kHz, and ultrasound is highly directional so it can be traced back to its source. What separates them is how fast you can cover ground and whether you need to find leaks from a distance.
| Model | Type | How you find the leak | Best suited to |
|---|---|---|---|
| WA-EUS-720 | Ultrasonic detector with headphones | Heterodyning converts ultrasound into audible sound. You hear the leak and sweep to pinpoint it. | Detailed diagnostic work. Because you hear the actual sound signature you can discriminate a leak from a bearing, a valve or an electrical discharge. |
| WA-EUS-740 | Compact ultrasonic detector | LED bar shows relative leak intensity, audible tone confirms it. | Routine walk-rounds by maintenance staff. Simple enough that it gets used weekly rather than sitting in a cupboard. |
| WA-EUS-750 | Acoustic imaging camera | Converts ultrasound into a real-time visual sound map overlaid on what you are looking at. | Surveying large or high-level pipework quickly, and for anyone who has to show a manager where the leaks are rather than describe them. |
The honest way to choose: if one person will survey the whole plant in a day or two, the imager pays for itself in the time saved. If leak detection is a weekly habit performed by whoever is on shift, the compact detector gets used more and therefore finds more.
What ultrasonic detection will and will not find
Ultrasonic detection is the right tool for pressurised gas escaping to atmosphere, which is what a compressed air leak is. It works through plant noise because machinery noise is overwhelmingly below 20 kHz while the leak signal sits above it — this is why a survey can be run during production rather than during a shutdown, and it is the single biggest practical advantage over soap solution.
It is worth knowing the limits before you buy:
- Leaks inside a sealed enclosure will not be heard, because the enclosure attenuates the ultrasound. Open the panel.
- Very low differential pressure produces little turbulence and therefore little ultrasound. Below roughly 1 bar the signal weakens noticeably.
- A leak buried under lagging radiates from wherever the air finally escapes, not from the hole. Expect to trace it.
- Competing ultrasonic sources — a nearby air gun, a steam trap, a corona discharge — can mask a small leak. This is where the headphone-based WA-EUS-720 earns its place, because a trained ear tells them apart.
Running a leak survey that actually saves money
Buying a detector is the easy part. Most plants that own one still lose 20 to 30 percent of their generated air, because finding leaks and fixing leaks are different projects. A survey that produces savings follows six steps:
- Baseline first. Record flow and power before you start, otherwise you will never be able to prove what the programme achieved.
- Survey during production. Leaks only make noise when the system is pressurised and the plant is behaving normally.
- Tag every leak where you find it. A numbered tag on the pipe with the date is what converts a finding into a work order.
- Estimate the size and cost of each one. Our free compressed air leak cost calculator converts hole size, pressure, running hours and your tariff into rupees per year, which is the number that gets a repair approved.
- Repair in cost order, not in convenience order. One 3 mm leak is worth more than a dozen pinholes.
- Re-measure and repeat quarterly. Leak rates climb back to where they started within a year if nobody surveys again.
Frequently asked questions
How much do compressed air leaks actually cost?
In plants that have never run a formal survey, 20 to 30 percent of generated air is a common finding. On a 300 kW installation running two shifts that is comfortably several lakh rupees a year. Put your own leak count into the leak cost calculator for a figure specific to your plant.
Can I use an ultrasonic detector while the plant is running?
Yes, and you should. Plant noise sits below 20 kHz and the leak signal above it, so a survey during normal production is both possible and more representative than one during a shutdown.
Do I need training to use one?
To find obvious leaks, no — the compact models are deliberately simple. To discriminate a leak from a failing bearing or an electrical discharge, and to work efficiently in a congested plant, some practice matters. We provide handover training with the instrument.
Should I buy a detector or commission an audit?
They answer different questions. An instrument lets you find leaks whenever you want. A compressed air audit measures the whole system — flow, pressure, dew point, power — and tells you whether leaks are even your biggest loss. Most plants that buy an instrument after an audit use it far more effectively, because they know what they are looking for.
What is the difference between ultrasonic detection and an acoustic imaging camera?
Both listen to the same ultrasound. A detector tells you through sound and an intensity reading that you are near a leak. An imager shows it as a coloured overlay on a live image, which is much faster over large areas and far easier to put in a report.
Which model is right for your system?
Selection depends on pipe size, pressure, flow range and how the data needs to reach you. Tell us your application and we will shortlist the models that fit and send the datasheets.
Prefer to talk? Call +91 90477 78715. Working out whether it pays? Try the savings and ROI calculator or the leak cost calculator.
Related Products
More Leak Detectors
Explore Other Solutions
WISEAIR TECHNOLOGIES INDIA LLP
# 12 Sri Venkatalakshmi Nagar, Singanallur,
Coimbatore – 641005 India.
WiseAir Technologies India LLP is part of the Systel Asia group — specialists in compressed air management and smart monitoring solutions across Asia since 2002.
© Copyright 2026. WiseAir Technologies India LLP
Which model is right for your system?
Selection depends on pipe size, pressure, flow range and how the data needs to reach you. Tell us your application and we will shortlist the models that fit and send the datasheets.
Prefer to talk? Call +91 90477 78715. Working out whether it pays? Try the savings and ROI calculator or the leak cost calculator.
