Product Overview

The Epro PR6423/010-010-CN is an 8 mm Eddy Current Sensor used for non-contact measurement of shaft displacement, vibration, and other mechanical movements in rotating machinery. It belongs to the eddy current proximity sensing technology commonly used in turbine, compressor, pump, gearbox, and other critical rotating equipment monitoring systems.

The sensor works without physical contact between the probe tip and the monitored metal target. This makes it suitable for applications where continuous shaft rotation, high mechanical speed, or small displacement changes make contact-based measurement impractical.

In a turbine monitoring system, an Epro PR6423/010-010-CN can be positioned toward a rotating shaft to detect changes in the gap between the probe and shaft surface. The resulting displacement information can be used by the associated monitoring system for vibration analysis, shaft position monitoring, or machine protection.

The 8 mm sensor head format is useful where the available installation space around a bearing housing or shaft is limited. Correct probe positioning, mechanical clearance, target material, cabling, and the associated signal-conditioning equipment should be considered when installing or replacing the sensor.

Technical Specifications

Product Features

The PR6423/010-010-CN focuses on non-contact measurement for rotating machinery where mechanical movement must be detected without contacting the shaft.

Key characteristics include:

• Epro PR6423 series eddy current sensor
• 8 mm sensor head diameter
• Non-contact measurement principle
• Suitable for rotating shaft monitoring
• Applicable to displacement and vibration measurement
• Useful for turbine and rotating-equipment protection systems
• Suitable for applications with limited probe installation space
• Supports continuous monitoring of mechanical movement
• Can be integrated with associated Epro monitoring and signal-conditioning equipment
• Applicable to predictive maintenance and machine-condition monitoring systems

Working Principle

The PR6423/010-010-CN uses an electromagnetic field to detect changes in the distance between the sensor head and a conductive metal target.

Sensor Head → Electromagnetic Field → Shaft Target → Gap Change → Electrical Output → Monitoring System

1. Probe Excitation

   The eddy current sensing circuit establishes an alternating electromagnetic field around the probe tip.

2. Interaction with Metal Target

   When the probe is positioned near a conductive rotating shaft or other suitable metal target, eddy currents are induced in the target material.

3. Gap Variation

   Changes in the distance between the sensor head and the target alter the electrical characteristics of the sensing circuit.

4. Displacement Detection

   Shaft movement, vibration, or axial/radial displacement changes the probe-to-target gap and produces a corresponding change in the sensor signal.

5. Monitoring

   The associated signal-conditioning and monitoring equipment processes the sensor signal for machine-condition monitoring, alarm functions, or protection logic.

For rotating machinery, the measurement quality depends heavily on probe mounting, shaft surface condition, target material, probe orientation, and the correct operating gap.

Role in a Rotating Machinery Monitoring Architecture

The PR6423/010-010-CN serves as the physical sensing point between the rotating shaft and the machine monitoring system.

Rotating Shaft → PR6423/010-010-CN → Signal Conditioning → Monitoring System → Alarm / Protection Logic

Industrial Applications

The sensor is particularly relevant to machinery where continuous shaft movement must be monitored without introducing mechanical contact between the probe and rotating component.

Installation and Maintenance

1. Confirm the complete PR6423/010-010-CN model before replacement.
2. Check the sensor head diameter and available mounting position.
3. Inspect the probe mounting location for contamination, mechanical damage, or excessive vibration.
4. Position the sensor correctly relative to the monitored shaft or target surface.
5. Maintain the required probe-to-target clearance specified by the applicable monitoring system.
6. Route the sensor cable away from sources of mechanical damage and unsuitable electrical interference.
7. Verify cable connections at the sensor and associated signal-conditioning equipment.
8. Check the sensor signal before placing the machinery into normal operation.
9. Compare the measured signal with the expected shaft position or vibration condition.
10. Inspect the probe and mounting hardware during scheduled machinery maintenance.
11. Check for changes in probe position if the machine has undergone bearing, shaft, or housing work.
12. Investigate unstable readings by checking probe mounting, target condition, cable integrity, and associated electronics.

A sudden change in the sensor reading should not automatically be attributed to the probe. Mechanical clearance, shaft condition, mounting stability, cable problems, and monitoring electronics should be checked as part of the troubleshooting process.

Related Components

Recommended Related Models

Key Advantages

• Epro PR6423 series eddy current sensing technology.
• 8 mm sensor head diameter.
• Non-contact measurement of rotating machinery movement.
• Suitable for shaft displacement and vibration monitoring.
• Useful for turbine, compressor, pump, and generator applications.
• Compact probe head for applications with restricted installation space.
• Suitable for continuous machine-condition monitoring.
• Can be integrated with associated machinery monitoring and protection equipment.

Technical FAQs

What does the 8 mm sensor head of the Epro PR6423/010-010-CN indicate?

The 8 mm specification refers to the diameter of the sensor head. It defines the physical probe size and is an important consideration when selecting a mounting position around a shaft, bearing housing, or other monitored mechanical component.

Why is an eddy current sensor suitable for turbine shaft monitoring?

An eddy current sensor measures the position or movement of a conductive metal target without physically contacting it. This allows the probe to monitor a rotating shaft continuously without introducing mechanical wear between the sensor and shaft.

What mechanical conditions can affect PR6423/010-010-CN measurements?

Probe-to-shaft clearance, probe alignment, shaft surface condition, target material, mounting rigidity, and cable condition can all influence measurement quality. Mechanical changes around the probe should be checked when an otherwise stable measurement becomes abnormal.

Where is the PR6423/010-010-CN normally positioned on rotating equipment?

The probe is typically installed at a fixed position facing a conductive rotating component, commonly around a shaft or bearing area. The exact mounting location depends on whether the monitoring system is measuring radial vibration, axial movement, shaft position, or another mechanical parameter.