Ultra Pro – Ultrasonic leak imaging for high-reliability inspections

Redefining standards in gas leak inspection

The Ultra Pro hand-held ultrasound imaging camera is capable of accurately locating gas leaks from several meters with unrivaled speed. It excels finding leaks in high or in hard-to-reach areas.

The sensor works by detecting the specific sounds that pressurized gas leaks emit. Thanks to its integrated 124 ultrasound microphones, the ultrasound camera reconstructs the position of the sound source. The information is overlaid in real-time with a wide angle optical image.

Ultra Pro creates in a single tap images and videos that can then be assembled in reports either using Distran reporting software Audalytics or with the user favorite software.

Works with all types of gas


0.3 to 100m

or 1 to 300ft

Down to


or 2.10⁻⁴ cfm for a methane leak at 4bar and at 30cm distance

Down to



Pressures from

at 50mbar

or 0.7psi. It works also with vacuum leaks

Distran Ultra Pro
Pinpoint gas leaks with Distran

Ultrasonic Gas Leak Detection

Pinpoint gas leaks without scanning each single element

Ultrasonic Gas Leak Imaging is a technique that allows to analyze the sound emitted by leaks and to display it as an image. It works for any gas type even vacuum.


Why using Ultra Pro?

10 times faster than traditional methods

Classical gas detectors require the operator to thoroughly check every potential leak point. With Ultrasonic Imaging, the detection can be performed without scanning every single element. The inspection is done several meters away, reducing the need for scaffolding.

Reduce your exposure to gas

Leaks can be found several meters away (for bigger leaks up to 100m away). The operator is thus less or not at all exposed to hazardous location.

Uncover leaks in unexpected locations

As sound propagates beyond line of sight, hidden leaks that are missed with other techniques can be detected with Ultrasonic Imaging.

Quantify leak rate

Ultra Pro is able to quantify the leak rate (in liters per hours or in cubic feet per minute) in a few seconds without using a tripod.

Quantify gas leak rates and prioritize maintenance

Estimating gas leak rates has never been this easy

Thanks to its 124 sensors, Ultra Pro can not only locate leaks but also quantify how severe is a gas leak within seconds and without the need of a tripod. From the sound source loudness, a gas flow rate is automatically converted in real-time. It is not affected by the background noise. The leak rate quantification makes it possible to prioritize the maintenance and helps taking decisions regarding the repair of the leaks.

In addition the ultrasonic camera Ultra Pro estimates in real-time its limit of detection in the current environment given the user selected settings. It enables the operator to validate its inspection.

Estimating gas leak with Distran
Locate partial discharges with Ultrasound imager

Locate partial discharges, such as corona, tracking, arcing

Ultra Pro also pinpoints partial discharges and other electrical faults

Partial discharges such as Corona discharges, arcing and tracking happen in high-voltage systems and may lead to failures. These phenomena produce ultrasound and can be precisely localized with Ultra Pro.

Inspection reports with Audalytics

Get outstanding reports

Ultrasonic imaging shines when it comes to report because images speak more than a thousand words when it comes to describe a leak location. Furthermore, Distran developed an integrated reporting tool, called Audalytics, that enables the operator to create a report with annotations within minutes, after the inspection. The report can then be shared within all stakeholders without additional software, directly in the browser, where the videos are embedded seamlessly.
Special software features allow data-trending, dashboard functions and recording of voice notes.

Distran Audalytics reports
Distran Ultra Pro

Best ultrasonic camera

Best-in-class handling in the field

Ultra Pro has been developed from the beginning with industrials and by people that have performed many inspections in the past. Weighting only 1.3kg including the battery, the camera is operated with a single hand, so that the operator can safely inspect, even if it is in a staircase. The camera has also been tested for drops is designed to be robust. Its integrated LED lighting illuminate dark areas without the need of a separate light source.

1.3kg all inclusive

Single-handed, self contained

1200 lumens. Integrated LED lighting

Robust design


Technical specifications

Detected gasesAll compressed gases incl. air and vacuum
Working distanceFrom: 0.3 - 100 m (1 - 300 ft)
Typical: 4 - 6 m (13 - 20 ft)
Detection thresholdFrom 0.3L/h at 30cm (0.01ft3/h at 1ft)
Quiet environment 2 L/h at 30cm (0.1 ft3/h at 1ft)
Industrial environment 10 L/h at 30cm (0.4 ft3/h at 1ft)
Detection methodAcoustic imaging using 124 ultrasound sensors
Pressure differenceMin. 50 mbar (0.7 psi)
Acoustic angle of view180° (half-space)
Angular detection accuracy<1°
Weight1.3kg (2.9 lb)
Battery life2.5 hours, 2 batteries provided
Ex marking (for X version)Zone 2: Ex Gc IIC T4 (class 1 division 2)
Integrated LED lights1400 lumens
Data exportAudalytics or SD card

Frequently Asked Questions

At which distance can a leak be detected?

Depends on the flow rate of the leak, from 30cm (1ft) to 50-100m(150-300ft) . Large leaks, in thousand of liters per hour, can be detected up to 50 m. Small leaks, a few liters per hour, are detected at a few meters. Typical leak search distance is between 4 to 8 (13 to 26) meters.

What type of gases can be detected?

A difference of pressure of 50mbar (0.7psi) is recommended for a good detection. Below, it is still be possible to detect gas leaks, but the detection limit of the device is higher. The difference can also be negative (vacuum leaks).

Which gases can be detected ? Does it work with vacuum leaks?

The camera does not detect gases directly but the sound leaks make when the gas is escaping (learn more about technology). Vacuum leaks can also be detected because they create turbulences and thus ultrasounds. What is needed is a minimum pressure difference (typically 50mbar/0.7psi) and a path in the air for the sound to propagate.

Is it possible to operate Ultra Pro in noisy areas (compressor rooms, gas turbine enclosure, etc.)?

Ultra Pro filters all noises outside the detection window, in particular low frequency in the audible range. Even in a very noisy environment like in gas turbine noise enclosure with up to 100 dB(A) noise, leakages have been detected.

Ultra Pro estimates in real-time its lower limit of detection (LoD), allowing the user to know how accurate is the inspection. This is typically useful when acceptance criterion are used.

Can I inspect underground or insulated systems?

Direct sight is not required for leak detection, but the sound must propagate from the leak to the surface of Ultra Pro, where the microphones are located. This is typically not the case for underground systems (shielded by soil). For insulated systems it depends of how tight is the insulation.

What is the accuracy of Ultra Pro?

Similar to an optical camera, the accuracy is determined as an angle (the closer you are to a leak, the smaller is the linear accuracy). The accuracy depends on the acoustic imaging algorithm, the imaging frequency and how good the optical camera and the microphone array are matched.

The typical accuracy is about 1°.

Is the device ATEX Certified/Intrinsically Safe?

Ultra Pro X is the ATEX certified version of Ultra Pro. It is certified for zone 2 gas for class IIC (USA: div 2 class 1). It will be available by end of 2020. Pre-orders are already opened (customer get a temporary non-ATEX device in the mean-time).

Does Distran supply a tool to generate digital reports?

Yes. With every device, Distran includes a free access to his reporting tool Audalytics. Pictures and videos can be included in reports along with notes and comments and shared easily between stakeholders.