Magnetic Encoder Ring Tester Card

This magnetic encoder ring tester card is designed for inspecting magnetic encoder rings integrated into modern wheel bearing seals. These magnetic encoder rings are used together with active wheel speed sensors in ABS, ESP, and other vehicle stability systems.

Because magnetic encoder rings cannot be visually inspected under normal conditions, this tester card provides a simple and reliable method for checking their condition before installation, verifying the correct installation orientation, and diagnosing wheel speed signal issues.

When placed directly over the magnetic encoder ring, the tester card reveals the individual magnetic segments by displaying visible color changes corresponding to the north and south magnetic poles.

Applications

• Inspection of magnetic encoder rings in wheel bearings
• Verification before wheel bearing installation
• Determining correct wheel bearing installation orientation
• Diagnosis of ABS wheel speed sensor signal faults
• Workshop inspection and troubleshooting procedures

Features & Benefits

• Fast and reliable testing of magnetic encoder rings
• Visual indication of magnetic pole segments
• Helps prevent incorrect wheel bearing installation
• Supports diagnosis of wheel speed sensor faults
• Simple, non-destructive testing procedure
• Suitable for professional workshop use
• Compact and easy to store

How It Works

Place the tester card directly onto the magnetic encoder ring.

The magnetic north and south poles create visible color changes within the test field, allowing the magnetic segments to be clearly identified.

Irregular spacing or inconsistent magnetic patterns may indicate a damaged or defective encoder ring.

Set Contents

• Tester card
• Integrated protective sleeve with quick-reference instructions

Technical Specifications

• Application: Magnetic encoder ring testing
• Suitable for: Active wheel speed sensor systems
• Function: Visual inspection of magnetic pole segments
• Storage: Protective sleeve included