Product Overview

The Epro PR6423/013-000 is an 8 mm eddy current sensor used for non-contact measurement of relative displacement between a rotating or moving conductive target and the sensor probe. It is commonly used in machinery monitoring systems where shaft position, vibration, or mechanical movement needs to be detected without physical contact.

The sensor is suitable for rotating equipment such as turbines, compressors, pumps, generators, and other high-speed machinery. In these applications, the probe is installed near a conductive shaft or other metallic target, allowing changes in the target-to-probe distance to be detected during machine operation.

As part of an eddy current measurement chain, the PR6423/013-000 works with the appropriate signal conditioning or driver electronics. The resulting measurement can then be transferred to a machinery monitoring system for vibration analysis, alarm processing, or equipment protection.

Installation quality has a direct effect on measurement stability. Probe positioning, target condition, mounting rigidity, cable routing, and the associated signal-conditioning equipment should all be considered when commissioning or troubleshooting the sensor.

Technical Specifications

Product Features

• 8 mm eddy current sensing head for non-contact measurement.
• Suitable for rotating machinery condition-monitoring systems.
• Detects changes in the relative position of conductive metallic targets.
• Can be used for shaft displacement and vibration-related measurements.
• Suitable for integration with compatible eddy current signal-conditioning equipment.
• Applicable to turbine, compressor, pump, generator, and industrial machinery monitoring.
• Useful for machinery protection and predictive maintenance systems.

Working Principle

The PR6423/013-000 operates by generating an electromagnetic field at the probe tip and monitoring the effect of a nearby conductive target. When the distance between the probe and the metallic target changes, the electrical characteristics of the sensing circuit change accordingly.

For rotating machinery, the conductive shaft acts as the measurement target. Radial or axial movement changes the probe-to-target gap, allowing the associated driver electronics to convert the sensor response into a usable displacement signal.

Conductive Shaft / Target → PR6423/013-000 Sensor → Signal Conditioner / Driver → Machinery Monitoring System → Alarm / Protection

The sensor itself is the sensing element rather than the complete monitoring system. Measurement accuracy depends on the probe installation, target surface, sensing gap, cable condition, and compatibility of the associated driver electronics.

Role in a Machinery Monitoring Architecture

The PR6423/013-000 is installed close to the monitored mechanical target and forms the front-end sensing element of the eddy current measurement chain.

Rotating Shaft → PR6423/013-000 → Driver / Signal Conditioning → Machinery Monitoring System → Alarm & Protection

This arrangement allows the sensor to operate as part of a larger machinery protection and condition-monitoring system rather than functioning as an independent monitoring device.

Industrial Applications

Installation and Maintenance

1. Confirm that the PR6423/013-000 is suitable for the intended eddy current measurement system.
2. Verify the compatible driver or signal-conditioning equipment before installation.
3. Mount the probe securely to prevent movement caused by machine vibration.
4. Position the sensing head according to the applicable installation requirements and target geometry.
5. Verify the probe-to-target gap before placing the machinery into service.
6. Check that the monitored target provides a suitable conductive surface.
7. Protect the sensor cable from excessive mechanical stress, abrasion, and unsuitable routing conditions.
8. Keep connectors and electrical interfaces clean and properly seated.
9. Check the sensor signal during commissioning to confirm stable measurement behavior.
10. Inspect the probe mounting if the measurement becomes intermittent or unstable.
11. Check the cable and associated driver when the sensor signal is missing or abnormal.
12. After replacement, verify the complete measurement chain before returning the machinery monitoring system to normal operation.

Compatible System Components

Recommended Related Models

Key Advantages

• Non-contact measurement avoids mechanical contact with the rotating target.
• 8 mm sensing head suits machinery monitoring applications requiring compact probe installation.
• Suitable for shaft displacement and vibration-related measurements.
• Can operate as part of an Epro eddy current measurement chain.
• Applicable to turbines, compressors, generators, pumps, and other rotating equipment.
• Supports machinery condition monitoring and protection applications.

Technical FAQs

What does the PR6423/013-000 measure?

The sensor detects changes in the relative distance between its sensing head and a conductive target. In rotating machinery, this can be used to monitor shaft displacement or vibration-related movement.

Can the PR6423/013-000 operate without a signal converter or driver?

The probe is a sensing element and normally requires compatible driver or signal-conditioning electronics to process its eddy current response into a usable measurement signal.

What should be checked if the sensor output is unstable?

Start by checking the probe mounting, sensing gap, target surface, cable condition, connector connections, and associated driver. Mechanical movement of the probe itself can also appear as an unstable measurement.

Why is probe-to-target alignment important?

The eddy current measurement depends on the electromagnetic interaction between the probe and conductive target. Incorrect positioning, excessive gap variation, or an unsuitable target surface can affect the resulting measurement and should therefore be checked during commissioning.