M2M Gekko PAUT Phased Array Instrument with TFM, UT, TOFD (2023) (2023)

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Be the best inspector you can be

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Gekko® is a field-proven flaw detector offering PAUT, UT, TOFD and TFM through the streamlined user interface Capture™. Released in 32:128, 64:64 or 64:128 channel configurations, M2M Gekko combines high-resolution and speed while reducing inspectors’ training time.


Reinventing High-definition Portable UT

Pioneering real-time TFM since 2013, Gekko innovation keeps being driven by market applications. Used in accredited training centers and ready for TFM standards, it benefits from advanced algorithms through a streamlined software user interface (Capture). Simply powerful, Gekko brings the latest technology at your fingertips.

Built for All-level UT Inspectors

With continuously added tools in one standalone application, Capture eases the inspection process and reduces operator errors. Without the need to use third-party software to load basic and advanced procedures, all-level UT inspectors have access to performance through a visual and guided interface. Capture offers a quick way to improve PAUT knowledge and requires minimum training for phased array inspectors.

M2M Gekko PAUT Phased Array Instrument with TFM, UT, TOFD (2023) (1)


  • Increased accuracy with high-resolution imaging
  • Advanced defect analysis with Total Focusing Method (TFM)
  • Robust field unit with high battery autonomy
  • Easy setup with embedded scan plans
  • Evolutive software following inspectors feedback


  • Multi-group weld inspection procedures fully covered
  • HTHA and hydrogen damages inspection with TFM
  • Thick welds and CRA/stainless steel weld inspection enhanced with 128-element aperture
  • Corrosion mapping of large areas (up to 5 × 5 m [16.4 × 16.4 ft] / 1 mm [0.04 in] step)
  • Complex geometry dedicated solution for nozzle and fillet welds (Y and T joints)

Want to see Gekko in action? Book a demo!

Designed for the Field

Gekko, the #1 PAUT unit with Total Focusing Method (TFM), has been upgraded based on inspectors' feedback. Offering both conventional UT, TOFD and advanced PAUT, Gekko is the most versatile unit adapted to field conditions.

A Complete PAUT Portable Unit

Gekko includes all basics and advanced UT features in a reinforced compact casing designed for field use. It natively comes with conventional UT, TOFD and all beam-forming phased array UT techniques for single-beam and multi-group inspection and its 3-encoded axis capabilities make the Gekko ready for any challenging inspection. This rugged PAUT equipment also offers real-time TFM/FMC (Full Matrix Capture) and Adaptive TFM techniques.

(Video) M2M GEKKO - Discover the most powerful PAUT/TFM flaw detector and be the best inspector you can be.

Portable & Robust

Bumpers and connectors are designed for robustness and accessories versatility. The bright resistive touch screen allows outdoor use in rough conditions. Powered by 2 hot-swappable batteries, Gekko now reaches up to 6 hours of autonomy and becomes the ultimate reference in its product range. Designed for IP66 with a drop test rating in accordance with MIL-STD-810G, the rugged enclosure can withstand the harshest site conditions.

Fast Connectivity Solution

The connectivity solutions—dongle-activated Wi-Fi™, USB 3.0 connector and Gigabit Ethernet output—allow to speed up data transfer and to remotely control your inspection in challenging conditions (TeamViewer license included). Moreover, the 256 GB SSD makes the operator’s work very comfortable with unlimited data file size, thus saving time in the field.

Water and Drop Test

(Video) Eddyfi Technologies Gekko®: the most powerful PAUT/TFM flaw detector

M2M Gekko PAUT Phased Array Instrument with TFM, UT, TOFD (2023) (2)

No Compromise on Performance

The innovative electronics offers up to 128 channels, great signal quality and TFM resolution for improved detection and confidence. It now reaches a high scan speed and productivity.

Compatible With Most Accessories

Coming with an IPEX type PA connector and a LEMO16 encoder, Gekko is compatible with Eddyfi® accessories and most probes and scanners on the market. For other configurations, Eddyfi can provide the adapter to ensure compatibility with your current accessory.

Ask an Expert

Streamlined Workflow

Powered by Capture, the new generation Gekko has been designed toeasethe setup process andsave timefor the inspectors operating in tough environments.

The newly added onboard scan plan and analysis features join the popular 3-click wizards for evaluation of material velocities, amplitude balancing of the transducer, flat and curved wedge calibration, as well as theautomated TCG.

Enriched to offer an all-in-one inspection solution—from application design to inspection and reporting—Capture offers the latest phased array technologies in a couple of clicks.

M2M Gekko PAUT Phased Array Instrument with TFM, UT, TOFD (2023) (3)

M2M Gekko PAUT Phased Array Instrument with TFM, UT, TOFD (2023) (4)

Unique Features

  • Complete toolbox for TFM including TCG calibration
  • High-resolution TFM imaging up to 128 elements
  • 3-axis nozzle inspection with live overlay display
  • 3-axis paintbrush for composite and corrosion mapping
  • Live display of fillet weld inspection
  • Real-time Adaptive TFM (ATFM) for inspection of wavy surfaces

Ask an Expert

(Video) Eddyfi Technologies Gekko phased array instrument with 3-axis scanner

Exclusive Content

Workshop Capture 3.2 for welds


Pause-café avec Eddyfi | Inspection de soudures à l’aide d’une configuration multigroupes TFM

Coffee Break presented in French


Performance des outils d’analyse Capture pour l'inspection de soudures (PAUT, TOFD et TFM)

Workshop presented in French.

Ultrasons multi-éléments et TFM : puissance combinée pour l'inspection de structures critiques

Workshop presented in French.


Life is better with TFM: How can the game-changing method enhance your inspections in real-time

In this Webinar, you’ll learn:

  • How Eddyfi Technologies, as TFM pioneers, implemented new options for real-time TFM in its instruments (such as plane wave imaging -PWI-, etc,),
  • How this cutting-edge NDT technique can enhance your NDT inspections
  • How codes and standards are accounted for directly in the system to guarantee the compliance of all setup parameters
  • How intuitive and easy it is to use TFM within the Capture software, especially with 3D and toolbox analysis.

The webinar includes a presentation of the technique, illustrates the power of the Capture interface, features a demo portion and addresses some of the most frequently-asked questions.


How to simplify welds NDT inspection using Total Focusing Method (TFM) and Phased Array UT (PAUT)

Girth-weld inspections require numerous parameters to be specified on most flaw detectors. The Gekko and Mantis user interface (Capture) solves these challenges. Using off-the-shelf probes, the NDT inspector can quickly configure his unit, scan, and analyze the collected data with confidence.

In this Webinar, you’ll learn:

  • How fast Capture makes it easy to get ready to scan using ultrasonic techniques such as Total Focusing Methods (TFM) and Phased Array Ultrasonic Testing(PAUT), how streamlined is the analysis of TFM data and how chosen approaches compare.

    (Video) [Qnex] Gekko PAUT 장비 - TOFD Calibration

  • How adding TFM to a PAUT unit overcome limitations of each technique

  • A case study: girth-weld inspection setup, data acquisition, and analysis overview


Weld Inspection Paparazzi | World Pipelines Article

This exclusive content discusses the use of ultrasound imaging techniques for pipe welding inspection of varying weld conditions.

Download the PDF



Dimensions (W × H × D)
  • 410 × 284 × 126 mm (16.1 × 11.2 × 5.0 in)
Weight (with 1 × battery)
  • 6.4 kg (14.1 lb)
Power supply
  • 15 V, 5.67 A
Batteries (hot-swap capabilities)
  • Types: 2 × Li-ion, 94 Wh capacity
  • Typical life: up to 6 hours
  • 26.4 cm (10.4 in) resistive touchscreen
  • 1024 × 768 px screen resolution
(Video) GEKKO Portable Phased Array Flaw Detector December 2015


IP rating
  • Designed for IP66
Operating temperature
  • 10–45°C (14–113°F)
Storage temperature range
  • w/ batteries: 20–60°C (-4–140°F)
  • w/o batteries: 20–70°C (-4–158°F)
  • According to MIL-STD-810G


Fast gigabit Ethernet, Wi-Fi connection with USB dongle

(Video) M2M Gekko Calibration Static Tutorial ( Velocity, Amplitude Balancing, Angle /Hight Check &TCG ).@1

1 × Micro display port

1 × IPEX PA connector

3 × axis encoder input

1 × USB 3.0, 3 × USB 2.0

LEMO® 00 UT connectors (4P/R)

I/O 12 TTL (5 V/24 V), 6 × open collectors


PAUT channel configurations: 32:128PR, 64:64PR or 64:128PR

Active aperture up to 64 elements

Linear, matrix, dual linear & dual matrix arrays

Up to 8 beam sets | Up to 2,048 focal laws

Linear, sectorial, compound scanning & CIVA-laws import

CIVA-fueled phased array calculator

True-depth, constant sound-path & projection focusing modes

On-board focal law calculator on plates, pipe systems, fillet welds, nozzles


Real-time TFM up to 128 elements 256 kpi

Refresh rate up to 110 Hz at 65 kpi

Real-time adaptive TFM (ATFM)**

All calibration wizards available

Image resolution above 4 Mpi in post-processing

(Video) BE THE BEST INSPECTOR YOU CAN BE - Introducing the NEW Gekko

Direct, indirect and converted modes

FMC recording

8 × manual resolution levels, 1 × auto resolution setup


Hardware acquisition gates

PRF up to 40 kHz

Data flow on SSD up to 180 MB/s

Live 3D/overlay display

A-scan/peak data recording

Data compression up to 32x

Live data missed information

Data file size: limited by SDD capacity

1. 2 Fast Real time imaging TFM on GEKKO

2. Gekko PAUT

3. M2M Gekko Calibration Static Tutorial ( Velocity, Amplitude Balancing, Angle /Hight Check &TCG ).@2

4. GEKKO presentation film

5. GEKKO water-test ©M2M

6. GEKKO - Inspection of Electro Fusion Fittings

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(Video) OmniScan® X3 Phased Array Flaw Detector Overview


What is the difference between TOFD and phased array? ›

While PAUT uses reflection, TOFD uses diffraction. The transducer produces pulsed ultrasonic waves, which are diffracted to various degrees by irregularities in the scanned material, then collected on the material's far side by a receiver.

What is the difference between UT and TOFD? ›

In practice, testing with the TOFD method is only applied by continuously moving the probe pair along the weld seam, while in traditional UT techniques the probe must be also moved perpendicular to the weld seam. Depending on the equipment the scan is performed either manually or by use of an automated manipulator.

How does phased array ultrasonic testing work? ›

Phased Array is an ultrasonic testing technique that uses specialized multi-element “array” transducers and pulses those elements separately in a patterned sequence called “phasing”. This phasing sequence allows wave steering, focusing, and scanning. This is all performed electronically.

What is the difference between ut and paut? ›

A PAUT transducer uses multiple elements during a scan. Beams are emitted sequentially at multiple angles allowing PAUT to create a more detailed scan. Other UT methods, on the other hand, use a single probe to analyze an asset. By emitting multiple beams, PAUT allows for the inspection of even the most complex assets.

What is the disadvantage of TOFD? ›

A disadvantage of TOFD is that the gain must be very high, which produces a very high back wall echo and it is not suitable for coarse grained materials. There is a dead zone for defect detection under the surface. It means, defects close to the surface could not be detected.

What is the basic principle of TOFD? ›

Principle of operation

In a TOFD system, a pair of ultrasonic probes sits on opposite sides of a weld. One of the probes, the transmitter, emits an ultrasonic pulse that is picked up by the probe on the other side, the receiver.

How do I choose a UT probe? ›

Generally speaking, on the premise of meeting the requirements of flaw detection sensitivity, the probe with lower frequency shall be selected as far as possible; for forgings, rolled parts and weldments with finer grain, the probe with higher frequency shall be selected, usually 2.5-5.0mhz.

What are the uses of TOFD? ›

Time of flight diffraction is an advanced non-destructive testing method used for weld inspection. Time of flight diffraction (TOFD) is one of the most reliable non-destructive testing methods in testing welds for both pre-service and in-service inspection.

What is the main disadvantage of a phased array transducer? ›

The main disadvantages of phased-array systems are that (i) they are more expensive to purchase, (ii) operation and data interpretation are more difficult and (iii) there can be greater difficulty in achieving good ultrasonic coupling due to the larger probe dimensions.

What are the benefits of PAUT? ›

PAUT improves weld testing performance over single-probe ultrasonic testing and other NDT methods. Choosing the right ultrasonic testing equipment can increase efficiency, improve test reliability, and provide company managers the peace of mind of knowing that their welds will hold.

What are the advantages of PAUT? ›

The advantages of phased array ultrasonic testing (PAUT) include faster scans, a higher probability of detecting flaws and anomalies and the best possibility of performing an inspection. The PAUT method of non-destructive testing uses multiple beams to scan an asset.

What is the minimum thickness for PAUT? ›

25 mm (1.0 in.).

What are the two types of UT? ›

There are two types of UT pulsers that are commonly used, the spike pulser and the square wave pulser; both have advantages and drawbacks.

What is the PAUT method of inspection? ›

Phased Array Ultrasonic Testing (PAUT) is an advanced nondestructive examination technique that utilizes a set of ultrasonic testing (UT) probes made up of numerous small elements, each of which is pulsed individually with computer-calculated timing (“phasing”).

What is TOFD in UT? ›

Time of Flight Diffraction (TOFD) is a reliable method of nondestructive ultrasonic testing (UT) used to look for flaws in welds. TOFD uses the time of flight of an ultrasonic pulse to find the location of a reflector.

What is the lateral wave in the ToFD? ›

The lateral wave is simply the compression wave travelling parallel to the flat surface. If it is assumed to be travelling parallel to the flat surface (between the Tx and Rx probes) its refracted angle is therefore 90°.

What are the basic principles of ultrasonics? ›

An electric current passes through a cable to the transducer and is applied to the crystals, causing them to deform and vibrate. This vibration produces the ultrasound beam. The frequency of the ultrasound waves produced is predetermined by the crystals in the transducer.

What is time of flight diffraction equipment? ›

In time-of-flight diffraction (ToFD) systems, a pair of ultrasonic probes are used, sitting on opposite sides of a weld-joint or area of interest. A transmitter probe emits an ultrasonic pulse which is picked up by the receiver probe on the opposite side.

Which is the best couplant for UT? ›

For ultrasonic testing in low temperatures, a water-based couplant is not the best choice because they are more likely to freeze when the temperature drops. A better option in low temperatures is to use a silicone- or glycol-based couplant.

What are the four types of test probes? ›

Current probes
  • Sampling resistor.
  • Alternating current probes.
  • Direct-current probes.
  • Hybrid AC/DC current probes.

What is the best probe for vascular access? ›

Linear Array Probes

These high frequency probes are the commonest probes being used for peripheral vascular and small parts examination. They are good for both color as well as pulse doppler examinations. It is a better choice than a phased array transducer for vessel cannulation.

How does eddy current testing work? ›

In eddy current testing, a coil carrying an AC current is placed close to the specimen surface, or around the specimen. The current in the coil generates circulating eddy currents in the specimen close to the surface and these in turn affect the current in the coil by mutual induction.

How far can guided waves effectively propagate? ›

Pipes can be considered as one-dimensional structures along which the energy of axisymmetric guided ultrasonic wave modes propagates with little loss of energy, and propagation distances of up to 100 m have been achieved (Cawley et al.

What are the 4 types of transducer arrays? ›

The four main types of ultrasound transducers—linear, curvilinear, phased-array, and intracavitary—differ by crystal arrangement, size, and footprints, which determine their suitability in different imaging applications.

What are the limitations of phased array UT? ›

Disadvantages of Phased Array Ultrasound Testing

While PAUT has a wide range of abilities, it's not a preferred testing method for the detection of surface cracks, metal fatigue, or bolt hole inspections compared to eddy current testing.

What is a paut machine? ›

Phased Array Ultrasonic Testing (PAUT), also known as phased array UT, is an advanced non-destructive inspection technique that uses a set of ultrasonic testing (UT) probes made up of numerous small elements.

What is the advantage of phased array? ›

Phased array technology offers the ability to generate multiple sound beams focused at different areas of the weld and at different angles. Also, the ability to generate multiple sound beams allows the weld to be scanned and results in complete coverage.

What are the applications advantages of phased array antennas? ›

  • high antenna gain with large side-lobe attenuation.
  • very fast change of beam direction (in range of microseconds)
  • high beam agility.
  • arbitrary space scanning.
  • freely selectable dwell time.
  • multi-function operation by simultaneous generation of multiple beams.

What is one of the reasons phased array provides advantages over conventional ultrasonic testing? ›

Phased Array Ultrasonics brings faster inspection:

By using a single probe, Phased Array Ultrasonics can process a linear or a sectorial scanning of the entire probe to cover a larger area than with conventional UT in a very short time.

Which is not advantage of phased array radar? ›

Following are the disadvantages of Phased Array Antenna: ➨The coverage is limited to 120 degrees in both azimuth and elevation. ➨Lower frequency agility can be achieved. ➨Ray deflection is possible only in single plane using linear array configuration.

What is one of the advantages of ultrasonic inspection in relation to radiographic testing? ›

There is no radiation hazard in ultrasonic examination, and hence no disruption of work as there is with radiography. Volumetric and crack like defects can be detected, irrespective of their orientation.

What is the advantage of TOFD? ›

Advantages of ToFD

ToFD is a single pass operation, not amplitude dependent and very accurate for sizing of vertical defects. The technique is found to be substantially more accurate in sizing the height of defects than conventional pulse echo techniques, which are based on echo amplitude.

What are the three types of antenna array? ›

When the signals are counter phase, they cancel each other. The three types of phased array antennas are 1) linear array, 2) planar array, and 3) frequency scanning array.

What is meant by phased array? ›

A phased array is a group of sensors located at distinct spatial locations in which the relative phases of the sensor signals are varied in such a way that the effective propagation pattern of the array is reinforced in a desired direction and suppressed in undesired directions.

What is phased array also known as? ›

It is a way to direct waves of radiation toward a desired direction. Advertisements. A phased array is also known as a phased antenna system.

What are the 4 types of antenna? ›

Antenna Theory - Types of Antennas
Type of antennaExamples
Wire AntennasDipole antenna, Monopole antenna, Helix antenna, Loop antenna
Aperture AntennasWaveguide (opening), Horn antenna
Reflector AntennasParabolic reflectors, Corner reflectors
Lens AntennasConvex-plane, Concave-plane, Convex-convex, Concaveconcave lenses
2 more rows

What is the disadvantage of array antenna? ›

Drawbacks or disadvantages of Phased Array Antenna

Following are the disadvantages of Phased Array Antenna: ➨The coverage is limited to 120 degrees in both azimuth and elevation. ➨Lower frequency agility can be achieved. ➨Ray deflection is possible only in single plane using linear array configuration.

What is the difference between array and antenna? ›

The antennas radiate individually and while in array, the radiation of all the elements sum up, to form the radiation beam, which has high gain, high directivity and better performance, with minimum losses.

What is the biggest phased array? ›

The near-$900 million structure, operated by the U.S. Missile Defense Agency (MDA), is by far the largest phased-array radar system on Earth.

Why would someone use an array? ›

Arrays are used when there is a need to use many variables of the same type. It can be defined as a sequence of objects which are of the same data type. It is used to store a collection of data, and it is more useful to think of an array as a collection of variables of the same type.

What is an example of a phased array? ›

For example, AM broadcast radio antennas consisting of multiple mast radiators fed so as to create a specific radiation pattern are also called "phased arrays".

What are the three main types of array? ›

There are three different kinds of arrays: indexed arrays, multidimensional arrays, and associative arrays.

Where is phased array used? ›

Phased arrays are used for a wide variety of inspection and measurement applications, and they can be used for any job done by conventional ultrasonics. For example, phased arrays are used to detect and image defects including cracks, voids, and pits caused by corrosion.

What are the two main types of array? ›

There are two types of arrays:
  • One-Dimensional Arrays.
  • Multi-Dimensional Arrays.


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