NFA Probes
Near-field array probes provide single-pass detection of internal cracking and volumetric defects in aluminum-finned tubes and ferromagnetic heat exchangers.
Product overview
Eddyfi NFA Probes extend near-field testing with an array of coils for inspecting aluminum-finned tubes and ferromagnetic heat exchangers. They address fin-fan air cooler tubes, where external aluminum fins strongly influence inspection signals, and target internal pitting, cracking at tubesheets, erosion and wall loss.
The probes use up to 30 multiplexed coils to obtain high-resolution signals and support C-scan imaging at 305 mm/s (12 in/s) in tubes ranging from 19.05 to 38.10 mm (0.75–1.5 in). NFA enables axial and circumferential crack detection in a single pass, as well as detection of small volumetric defects approximately 3 mm (0.125 in) in size.
Magnifi software presents the inspection data as 2D/3D C-scans for defect discrimination and sizing. With no magnets, the probes are easy to push and pull and are less sensitive to pull speed than MFL probes; they also require neither water nor complex tools. Replaceable hardened-steel guides maintain constant liftoff, while kink-resistant poly supports probe usability and durability.
Key capabilities
Multiplexed coil array
Up to 30 coils provide high-resolution inspection signals and enable C-scan imaging.
Single-pass crack detection
The array detects both axial and circumferential cracks in a single pass.
Small-defect detection
NFA detects small volumetric defects approximately 3 mm (0.125 in) in size.
Intuitive imaging
Magnifi displays probe data as 2D/3D C-scans to support defect discrimination and sizing.
Magnet-free handling
The probes are easy to push and pull through tubes and are less sensitive to pull speed than MFL probes.
Replaceable wear guides
Hardened-steel, wear-resistant guides maintain constant liftoff and can be replaced when worn.
Kink-resistant construction
Premium non-kink nylon poly enhances probe usability and service life.
Water-free inspection
The probes require neither water nor complex tools.
Published technical specifications
Values as published by Eddyfi Technologies. Where models or variants differ, each is listed separately.
GENERAL
- Coil technologies
- Absolute; Array (pitting, circumferential, and axial)
- Maximum test speed
- 305 mm/s (12 in/s)
- Minimum detectable defect size
- 3 mm (0.125 in)
- Target materials
- Ferrous, carbon steel and low-carbon steel alloys
- Poly
- 9 mm (0.375 in) premium, non-kink nylon
- Connector
- 160-pin array connector
- Calibration standard
- Modified NFT calibration standard
Array Performance and Quality
- Coil count
- up to 30 coils
- Tube size range
- 19.05 to 38.10 mm (0.75–1.5 in)
Detection Capability
- Small volumetric defect size
- approx. 3 mm/0.125 in
Intuitive Imaging
- Data display with Magnifi
- 2D/3D C-scans
- Replaceable hardened-steel, wear-resistant guides
- High-end, kink-resistant poly
- Magnifi
- The stated C-scan scan speed of 305 mm/s (12 in/s) applies to tubes ranging from 19.05 to 38.10 mm (0.75–1.5 in).
- Listed target materials are ferrous, carbon steel and low-carbon steel alloys.
Compatibility lists only items named by Eddyfi for this product; confirm configuration with EMUS before ordering.
Typical applications
- Aluminum-finned carbon steel tube inspection
- Fin-fan air cooler tube inspection
- Ferromagnetic heat exchanger inspection
- Inner diameter pitting detection
- Internal cracking detection at tubesheets
- Internal erosion and wall loss detection
- Axial and circumferential crack detection
Official brochures
Tubing Probe Catalog
Additional documents
Other Eddyfi products
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CompareHow EMUS supports this
Equipment is only part of the answer. Every system we supply is backed by regional engineering, service and application support.
Mechanical, electrical, environmental setup done right the first time.
Qualification and acceptance testing against real criteria.
Operator and application training built around your parts.
Traceable calibration to keep measurements audit-ready.
Preventive and corrective service across the Balkan region.
Method development and problem-solving with our engineers.
Eddyfi Technologies
Part of the Eddyfi Technologies portfolio, represented by EMUS across the Balkan region.
Application Notes & resources
Official application notes and technical literature for NFA Probes.
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