Portable NDT Inspection
Provides a portable magnetic field for non-destructive testing and magnetic particle inspection of ferromagnetic materials.
PERMANENT MAGNETIC YOKES
Portable non-destructive testing equipment for magnetic particle inspection, crack detection, welding preparation and field inspection applications.
NDT • MPI • WELD INSPECTION • FIELD USE
Permanent Magnetic Yoke
The Permanent Magnetic Yoke is a high-performance inspection tool designed for professionals who require accuracy, reliability and efficiency in non-destructive testing. Built using powerful neodymium rare earth magnets, it delivers a strong magnetic field for the detection of surface and near-surface defects in ferromagnetic materials. With no electrical supply required, it offers complete portability for field inspections, workshop use and difficult-to-access areas. The yoke works with contrast paints and magnetic inks to help identify cracks, lack of fusion and other structural flaws quickly and reliably.
Technical Specifications
| Magnet Specifications | |
| Magnet Type | Neodymium (Rare Earth) |
| Magnet Grade | N48 |
| Pull Force | > 23 kg |
| Leg Span | 170 mm |
| Diameter | 25 mm |
| Yoke Specifications | |
| Length | 425 mm |
| Material | Stainless Steel (SS304) |
| Weight | 600 – 700 g |
| Wire Specifications | |
| Material | Flexible Coated Steel Cable |
Specifications are the intellectual property of Techco Power Engineering and may not be reproduced without written consent.
Technical Drawing
Technical drawings are the intellectual property of Techco Power Engineering. Reproduction or distribution without written authorisation is strictly prohibited.
Permanent Magnetic Yoke Overview
Permanent Magnetic Yokes provide a portable magnetic field for non-destructive testing (NDT), crack detection, welding preparation and inspection applications. They require no electrical power and are suitable for both workshop and field use.
Magnetic Yokes are used for non-destructive testing of ferromagnetic materials such as mild steel and 3CR12. This process, known as Magnetic Particle Inspection (MPI), detects weak points such as bad welds, cracks or lack of fusion. These yokes are portable, easy to use and require no external power, making them ideal for workshops, construction sites, welding inspections, fabrication work and field inspections.
Permanent Magnetic Yoke Overview
Portable non-electric magnetic yokes for non-destructive testing, magnetic particle inspection, crack detection and welding inspection applications.
No Electrical Power Required
Permanent magnetic operation makes the yoke suitable for field work, workshops and difficult-to-access inspection areas.
Crack and Weld Defect Detection
Used with contrast paints and magnetic inks to help detect surface and near-surface defects such as cracks, bad welds and lack of fusion.
Rugged Workshop and Field Use
Designed for construction, welding, fabrication and NDT environments where portability and reliability are essential.
Industries Served
Permanent Magnetic Yokes are used in construction, welding, fabrication and non-destructive testing environments.
Construction
Used for field inspection of ferromagnetic structures, welds and steel components where portable NDT equipment is required.
Welding
Supports weld inspection, welding preparation and defect detection before, during or after fabrication work.
Fabrication
Used in workshops and fabrication facilities to inspect mild steel, 3CR12 and other ferromagnetic materials.
Non-Destructive Testing (NDT)
Designed for magnetic particle inspection applications where surface and near-surface defects must be identified without damaging the component.
Equipment Details
The Permanent Magnetic Yoke is designed for practical MPI work in rugged environments.
High-Performance Inspection Tool
Designed for professionals who require accuracy, reliability and efficiency in non-destructive testing.
Surface and Near-Surface Detection
Delivers a strong magnetic field for detecting surface and near-surface defects in ferromagnetic materials.
Flexible Coated Steel Cable
The flexible coated steel cable is encased in a stainless steel tube for durability and cleaning convenience.
Hard-to-Reach Areas
Portable, non-electric design makes the yoke suitable for difficult-to-access inspection areas.
Key Features
Permanent Magnetic Operation
No electrical supply is required, improving portability and convenience during workshop and field inspections.
Neodymium Rare Earth Magnets
Powerful N48 neodymium magnets provide strong magnetic field performance for MPI applications.
Portable and Lightweight
The yoke is lightweight and practical for field work, hard-to-reach inspection areas and daily workshop use.
Durable Stainless Steel Construction
Stainless steel construction and a flexible coated steel cable support durability and ease of cleaning.
Adjustable Leg Span
Adjustable positioning improves usability across different inspection surfaces and component geometries.
Works with MPI Consumables
Designed to work with contrast paints and magnetic inks to help highlight defects quickly and clearly.
Key Benefits
Fast Inspection Results
Helps inspectors quickly identify cracks, lack of fusion, bad welds and other structural flaws.
Workshop and Field Flexibility
Portable design supports both controlled workshop inspections and on-site field inspection requirements.
Reduced Setup Requirements
Permanent magnet operation removes the need for electrical power, cables or generators during inspection.
Reliable Defect Detection
Provides a strong magnetic field for detecting surface and near-surface defects in ferromagnetic materials.
Improved Safety and Quality Control
Supports weld integrity, structural reliability and inspection compliance in fabrication and construction environments.
Practical Handling
Lightweight yet robust construction improves comfort and usability during repeated inspections.
Technical Specifications
Permanent Magnetic Yokes are selected according to inspection application, material type, required pull force, access conditions and NDT procedure requirements.
| Magnet Type | Neodymium (Rare Earth). |
| Magnet Grade | N48. |
| Pull Force | > 23 kg. |
| Leg Span | 170 mm. |
| Diameter | 25 mm. |
| Yoke Length | 425 mm. |
| Yoke Material | Stainless Steel (SS304). |
| Weight | 600 – 700 g. |
| Wire Material | Flexible coated steel cable. |
Specifications are the intellectual property of Techco Power Engineering and may not be reproduced without written consent.
Permanent Magnetic Yoke — FAQs
What is a Permanent Magnetic Yoke used for?
It is used for non-destructive testing, magnetic particle inspection, crack detection, welding inspection and ferromagnetic material inspection.
Does it require electrical power?
No. It uses permanent magnets and requires no electrical supply.
Which materials can be inspected?
It is used on ferromagnetic materials such as mild steel and 3CR12.
Can it be used in the field?
Yes. Its portable non-electric design makes it suitable for both workshop and field inspections.
What inspection consumables are used with it?
It can be used with contrast paints and magnetic inks to highlight cracks, lack of fusion and other structural flaws.
Selection Note
Select the Permanent Magnetic Yoke according to inspection surface, access conditions, material type, NDT procedure and required pull force.
Ensure Flawless Work with MPI
Permanent Magnetic Yokes support safety, quality control and compliance in fabrication, welding, construction and non-destructive testing applications. Speak to a product specialist for the correct equipment, documentation and inspection support.