The use of the Eddy Current Testing (ECT) in NDT is well documented and widely utilized. Even though the Eddy Current Array (ECA) technology is still new for many sectors, this technology offers significant benefits in the tube testing sector.


A Canadian company, SG NDT, is a relatively new player on the scene, having been founded in 2012. However, the past 8 or 9 years have been busy ones, culminating in a novel eddy current testing experience that has been well-received by a variety of industries. These include the nuclear sector, aeronautics, oil & gas, and manufacturing.




The S2G2-800 is the latest development of eddy current equipment to be introduced to the market. This welcomed combination of technology, compact size, and adaptability bring significant advantages:


One of the biggest plus points is the reduced size and weight of the unit. The S2G2-800 is the most portable on the market today, weighing in at 4.5kg. This makes it particularly useful for testing in hard-to-reach locations where testers and/or kit transportation is limited.


NDT testing of surfaces and tubes requires equipment that can address multiple materials and applications. The S2G2-800 has built-in capabilities, allowing the user to combine a variety of testing technologies:

  • Eddy Current Testing (ECT)

  • Eddy Current Array (ECA)

  • Near-Field Testing (NFA)

  • Remote-Field Testing (NFT)

  • Near-Field Array (NFA)

  • Magnetic Flux Leakage (MFL)



This brand-new digital technology has a unique signal-to-noise ratio, providing higher sensitivity to defects that older tech might miss. This increased detection rate leads to more accurate maintenance and repair timetables, as well as dramatically lowers the risk of unplanned downtime.


An integrated motor controller drives the equipment’s motorized vectors and controls the connected probe.


All technologies are covered, with the ability to drive multi-element probes. As well as eddy current and eddy current array, its capabilities also include magnetic flux leakage, remote-field and near-field from the same connector.



Inspections for difficult-to-reach areas has never been so easy

The Nano S2G2 (nS2G2) was designed for the inspection of wide diameter cast iron pipelines


Remote field ARRAY technology simplifies data analysis with a C-Scan image display. Defects are detected in a more precise manner, to determine their exact location and size; width, and depth to facilitate access to difficult-to-reach sections.


The acquisition card saves the data it collects on a PC or memory card, which can be downloaded once the probe has completed the inspection and been removed from the pipeline.


Carbon steel and cast iron pipeline inspection


Remote Field Array technology works with a variety of ferrous pipe detections (steel, cast iron, ductile cast iron), and defects as shallow as 20% from the wall thickness. Technology performance depends largely on 3 factors: pipe material, probe fill factor (the relation between the exterior diameter of the probe and the interior diameter of the pipe), and probe stability within the pipe. Probes are also sensitive to ID and OD defects. Other tools may be used to distinguish identification defects from OD defects, much like a remote visual inspection. A general traction speed of 5 meters per minute is employed.

The nS2G2 is made to optimize inspection within a single piece of equipment, the autonomous probe.

  • Multiple printed circuit boards

  • Battery autonomy is 5 hours, in autonomous ARRAY mode.

  • Data acquisition is synchronized with an external dial.

  • Increased flexibility in 90-degree U-BENDs.

Unrivaled performances



  • Power: 110/220 Vac, 48 to 63 Hz

  • Size and weight: 55 x 74 X 11 mm

  • Computer interface: Gigabit Ethernet

  • Compliance: Rohs

  • Operating temperature: 0° to 50°C

  • Power configuration: 6 VDC à 9 VDC

  • Battery type: Lithium-ion rechargeable

  • Battery autonomy: 5 hours nS2G2-ARRAY

  • Inputs/outputs Start/Stop

Remote field Array

  • Frequency range: 0-50 KHz

  • Driving mode: Continuous

  • Probe drivers: 1

  • Drive voltage: +/- 10 Volts

  • Output current: 1

  • Probes inputs: 8

  • Number of frequencies: 1

  • Number of coils: 256

  • A/D converters: 16 Bits

  • Data format: 32 Bits 

  • Encoder: 1

  • Data rate: 40,000 data