Tubing Probes

With a distinctive design and exceptional mechanical characteristics, SG NDT tubing probes offer accuracy combined with a long product lifecycle using the latest materials.

An exclusive design and a robust configuration in stainless steel and high-end engineering thermoplastics envelop safely the coils and circuit. The Eddy current elements are protected by a high-end industrial ceramic component. It withstands abrasion and high temperatures up to 60°C (140°F) with a carefully selected semi-flexible nylon tubing.

Our probes are manufactured and tested to surpass industry standards, which guarantee the conformity and optimization of the probe’s durability and Eddy current data results.

Eddy Current Probes

Finned Tube

SG NDT has specifically designed probes to meet the requirements for finned tubes.

These probes offer a better alternative to the IRIS Technique based on an ultrasound technology. The Eddy current Array probe will become your best detection tool for tubing inspection.

Eddy Current Array Probe

Eddy Current Array (ECA) probes are designed to improve the resolution of conventional Eddy Current and remote field inspection techniques.

Tubing ECA probes are commonly used in condensers, feedwater heaters and heat exchangers to detect circumferential cracking which is nearly invisible with bobbin probes.
Different types of ECA sensors are developed at SG NDT to detect all type of defects such as corrosion, wear, pitting, stress corrosion cracking (SCC), tubesheet cracking.

Motor Units

Our high-speed rotating motor units have consistent rotation rates and increased motor torque to spin probe heads and shafts through restrictive tube areas. The current design incorporates the use of numerous instruments and various probe types.

Motor units used with SG NDT S2G2 technology. This allows tuning parameters to automatically be set, avoiding potential damage to the instrumentation. Many different RPM options are available.

Remote field probes

The remote field probes include a 32-dB preamplifier. These probes, known as Boiler, feature improved wear resistance and thicker casing as well as improved differential response and SNR ratios. These probes are designed to detect irregularities such as pitting, corrosion, and erosion in ferromagnetic tubing. They are available in single exciter, dual pickups, and dual exciter designs.

The RFT probe holds a 19-Pin Amphenol Connector.
Moreover, you may prefer the flexible, BOILER type to the Rigid probe depending on the purpose.
Both types are available with a single driver or a double driver embedded.
A Boiler Articulate is also available upon request.


Remote field technology is commonly used for carbon steel tube inspection. It is
meant to detect corrosion and measure the tube wall thinning, but it is not able to
properly detect small internal pitting. Near Field technology is a very interesting
alternative to detect these.
SG NDT has developed a probe by combining both technologies, providing
S2G2-800 equipment users to inspect tubes by using probes equipped with both
types of receivers,

Advanced Bobbin Probes

Our bobbin probes set the standard for efficient and accurate inspections. We apply advanced materials, design and production so that you get clean Eddy current data that are consistent through the duration of the inspection, as well as for the life of the probe.

We offer probes designed for specific tubing types including thimble tubing, HVAC, restricted access or u-bends, and high permeability. Our probes come in various diameters to cover all the potential tube sizes.

Near field probes


A great alternative to Magnetic Flux Leakage, the NFT BOBBIN probe uses induced coils to detect accurately small defects inside fin-fair cooler tubes, heat exchangers, axial cracking, wall loss, erosion and more.

Near Field Array drives coils to generate more accuracy during the inspection thanks to the array benefit, holding up to 32 coils.

Aluminum-finned Carbon Steel tubes are harder to inspect caused by the exterior fins on the tube. They often cause interference within the signals, which makes interpretations of the C-scans difficult and presents lesser quality results.

SG NDT’s NFA can detect defects inside fin-fair cooler tubes and heat exchangers which includes: erosion, wall loss, cracking and more.