AC/DC Magnetic Particle Yoke – Portable NDT Flaw Detector for Surface & Near-Surface Defects
Price:
Negotiable
MOQ:
1 PIECE
Delivery Time:
within 5 days
Brand:
TESTECH
Product Description
AC/DC Magnetic Particle Yoke – Portable NDT Flaw Detector
Professional portable non-destructive testing equipment for detecting surface and near-surface defects in ferromagnetic materials.
Working Principle & Technology
AC Magnetic Yoke
- Excitation Mode: Industrial frequency alternating current (AC 220V/50Hz)
- Core Effect: Skin effect concentrates magnetic field on workpiece surface (0-2mm depth)
- Advantage: Alternating magnetic field produces slight vibration for clearer defect indications
- Lifting Force: ≥45N (approximately 4.5kg)
- Adjustable Pole Distance: 10-220mm
DC Magnetic Yoke
- Excitation Mode: Direct current (full-wave/half-wave rectified DC or battery DC)
- Core Feature: Deep penetration performance reaching 0-6mm inside workpiece
- Lifting Force: ≥177N (approximately 18kg)
- Adjustable Pole Distance: Customizable for various applications
AC/DC Dual-purpose Magnetic Yoke
- One-button AC/DC mode switching capability
- Combines high surface sensitivity with deep subsurface detection
- Built-in demagnetization function in AC mode
- Ideal for complex inspection applications
Technical Comparison
| Feature | AC Magnetic Yoke | DC Magnetic Yoke | AC/DC Dual-purpose Yoke |
|---|---|---|---|
| Detection Depth | Surface 0-2mm | Subsurface 0-6mm | 0-6mm by mode switch |
| Surface Sensitivity | Extremely high | Medium | Extremely high in AC mode |
| Magnetic Field | Alternating, skin effect, micro vibration | Stable, deep penetration, no vibration | Dual performance |
| Lifting Force | ≥45N (4.5kg) | ≥177N (18kg) | Meets both standards |
| Demagnetization | Built-in AC reverse demagnetization | External demagnetizer needed | Built-in AC demagnetization |
| Application Scope | Welds, thin plates, surface cracks | Thick plates, forgings, subsurface defects | All-purpose universal use |
| Power Supply | AC 220V/50Hz | Battery / AC-DC rectifier | AC 220V/50Hz |
Structure & Specifications (Model CDX-220)
- Magnetic Core: High-quality low-loss silicon steel sheet
- Magnetic Pole Head: Flat / U type with 10-220mm adjustable distance
- Housing: Full plastic insulated shell, impact-resistant design
- Control System: Load control switch, indicator light, leakage-proof power cable
Main Parameters
Model: CDX-220
Rated Voltage: AC 220V 50Hz
Magnetization Mode: Alternating current magnetization
Flat Pole Lifting Force: ≥6kg (≥58.8N)
U-type Pole Sensitivity: Clear indications shown by No.2 magnetic field indicator
Adjustable Pole Distance: 10-220mm
Dimension: 170×150×50mm
Weight: 2.5kg
Application: Inspection of flat welds, fillet welds and special-shaped welds
Operation Specifications
- Apply lubricant to pin joints before use; inspect power cable, leakage protection device and switch performance
- Switch on after pole heads fully contact workpiece; turn off switch before separating equipment
- Recommended pole distance for AC yoke: 50-150mm; effective detection area is 50mm on both sides of pole connection line
- Regularly test lifting force with standard test block to meet standard requirements
- Demagnetization: Slowly move AC yoke back and forth over workpiece to finish demagnetization
Selection Guide
Choose AC Yoke: For surface cracks on welds, thin plates and castings requiring high sensitivity and convenient demagnetization
Choose DC Yoke: For subsurface defects on thick plates and forgings requiring deep magnetic penetration
Choose AC/DC Dual-purpose Yoke: For multi-scene complex inspection, providing both surface and subsurface flaw detection with one unit
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Testech Group Co., Ltd
Location
Huihuang Guoji Building NO. 4, Shangdi 10 street Haididan district, Beijing City, CHINA
Contact Person
Linda