Product Overview

The Epro PR6423/01M-010 8mm Eddy Current Sensor is a non-contact sensor used to monitor the relative movement of conductive targets in rotating machinery. As part of the PR6423 Series, it can be incorporated into measurement channels for observing shaft displacement, position, and vibration-related movement.

The sensor is installed close to the monitored shaft or another suitable conductive target. Changes in the relative distance between the sensing head and target alter the eddy current response, allowing the associated electronics to detect mechanical movement without physical contact with the rotating component.

This sensing method is useful in machinery such as turbines, compressors, generators, motors, pumps, and other rotating equipment. It can support monitoring arrangements where continuous observation of shaft movement is required for operating-condition assessment or machinery protection.

The PR6423/01M-010 should be matched with the appropriate driver, signal-conditioning equipment, and monitoring input when used as a replacement. Installation conditions also need attention because probe mounting, target characteristics, alignment, and sensor-to-target positioning directly affect the measurement.

Technical Specifications

Product Features

• PR6423 Series 8mm eddy current sensor.
• Non-contact detection of conductive target movement.
• Suitable for shaft displacement and position measurement.
• Supports radial and axial movement monitoring applications.
• Can be used in vibration-related machinery monitoring channels.
• Suitable for integration with compatible Epro signal-conditioning equipment.
• Applicable to turbines, compressors, generators, motors, pumps, and other rotating machinery.
• Supports continuous measurement arrangements where physical contact with the shaft is undesirable.
• Suitable for maintenance and replacement of compatible PR6423 Series installations.

Working Principle

The PR6423/01M-010 generates an electromagnetic sensing field at the monitored target. When a conductive shaft moves relative to the sensor head, the interaction between the field and target changes, producing a corresponding change in the electrical response of the sensing circuit.

A compatible driver or signal-conditioning device processes this response and converts it into a measurement signal for the monitoring system. The downstream system can use the signal to observe shaft position, displacement, or vibration-related movement.

Rotating Shaft / Conductive Target → PR6423/01M-010 → Eddy Current Driver → Machinery Monitoring System → Alarm / Protection

The measurement represents the relative position between the probe and target. A loose mounting arrangement or movement of the sensor itself can therefore influence the result. Mechanical stability and correct probe positioning are essential during commissioning.

Role in an Epro Eddy Current Monitoring Architecture

The PR6423/01M-010 occupies the field sensing stage of an eddy current monitoring channel. It provides the initial response to mechanical movement before the signal reaches the driver and downstream monitoring equipment.

Rotating Machinery → PR6423/01M-010 → Signal Conditioning → Monitoring Input → Machinery Protection / Control

The sensor should be diagnosed together with its driver, cabling, mounting arrangement, and monitoring input rather than treated as an independent measurement device.

Industrial Applications

Installation and Maintenance

1. Confirm the complete PR6423/01M-010 model designation before installation.
2. Verify compatibility with the intended Epro driver, signal-conditioning equipment, and monitoring input.
3. Isolate the monitored machinery and follow applicable safety procedures before working near rotating equipment.
4. Inspect the sensor body and sensing head for mechanical damage, contamination, or deformation.
5. Secure the sensor mounting arrangement so that the probe cannot move during normal machine operation.
6. Position the sensing head correctly relative to the conductive shaft or target surface.
7. Establish the required sensor-to-target gap according to the applicable monitoring-system requirements.
8. Route the sensor cable to minimize excessive bending, mechanical stress, and avoidable electrical interference.
9. Check connectors and terminations for secure attachment and contamination.
10. Verify the sensor response through the associated driver and monitoring input during commissioning.
11. If the signal becomes unstable, inspect probe mounting, target condition, cable integrity, driver operation, and monitoring input.
12. After replacement, verify the complete measurement channel and confirm normal machinery monitoring operation before returning the equipment to service.

Compatible System Components

Recommended Related Models

Key Advantages

• Provides non-contact sensing of conductive shaft movement.
• Supports shaft displacement, position, and vibration-related monitoring.
• Suitable for continuous rotating machinery measurement.
• Works as the sensing stage of a complete eddy current measurement channel.
• Can be integrated with compatible Epro signal-conditioning equipment.
• Suitable for turbines, compressors, generators, motors, pumps, and other rotating equipment.
• Allows shaft movement to be monitored without physical contact.

Technical FAQs

What type of machinery can use the PR6423/01M-010?

The sensor can be applied to rotating equipment where non-contact measurement of a conductive target is required, including turbines, compressors, generators, motors, pumps, and similar machinery.

How should the sensor gap be handled during installation?

The sensor-to-target gap should be established according to the requirements of the complete monitoring system and associated electronics. It should not be selected solely from the nominal sensor diameter.

What can cause a false indication of shaft movement?

Movement of the sensor mounting can change the relative sensor-to-target distance just as shaft movement does. Loose mounting, vibration of the support structure, cable forces, and changes in target geometry should therefore be investigated when unexpected readings occur.

Why must the driver be considered when replacing the sensor?

The sensor operates as part of an eddy current measurement chain. The associated driver provides the electrical interface and signal conditioning required by the monitoring system, so sensor and driver compatibility should be confirmed before commissioning a replacement.