Product Overview

The Epro PR6424/001-030 is a 16 mm eddy current sensor used for non-contact measurement of shaft position and movement in rotating machinery. It belongs to the EPRO PR6424 family of eddy current measuring systems commonly applied to machinery protection and condition monitoring.

The sensor operates without physical contact with the monitored metallic target. In a typical rotating equipment installation, the probe is positioned close to a shaft or other conductive machine component, allowing changes in the electromagnetic field to be converted into a corresponding measurement signal by the associated eddy current measuring electronics.

This type of sensor is particularly useful where direct mechanical contact would introduce wear, friction, or measurement disturbance. It can be integrated into machinery monitoring arrangements for applications such as shaft displacement, vibration-related measurements, and rotational equipment condition monitoring.

Technical Specifications

Product Features

• Uses a non-contact eddy current measurement principle for rotating machinery applications.
• Provides measurement capability without physical contact with the monitored shaft or target.
• Suitable for machinery protection and condition monitoring systems.
• Supports monitoring of relative shaft movement and displacement-related conditions.
• Can be used where continuous observation of rotating components is required.
• Works as part of a complete eddy current measurement chain with associated signal-conditioning electronics.
• Suitable for industrial rotating equipment where mechanical contact at the measurement point is undesirable.
• Supports installation close to conductive machine targets for electromagnetic measurement.
• Provides a dedicated sensing element for machinery monitoring applications.

Working Principle

The PR6424/001-030 uses the eddy current principle to detect changes in the distance between the sensor and a conductive target. The probe generates an electromagnetic field around its sensing area. When a metallic shaft or target enters this field, eddy currents are induced within the conductive material.

Changes in the probe-to-target relationship alter the electrical characteristics of the sensing circuit. The associated measuring electronics interpret these changes and convert them into a usable measurement for the machinery monitoring system.

Sensor → Conductive shaft / target → Eddy current interaction → Measuring electronics → Machinery monitoring system

Because the sensor does not need to physically touch the rotating component, the measurement arrangement avoids mechanical contact between the probe and shaft. This is particularly useful for continuously rotating machinery where contact-based measurement would introduce wear or interfere with shaft movement.

For machinery monitoring, the sensor can form part of a larger measurement chain in which changes in shaft position or relative movement are evaluated by the monitoring and protection system. Correct probe positioning and a suitable conductive target are therefore important for obtaining a usable measurement.

Role in an EPRO Rotating Machinery Monitoring Architecture

The PR6424/001-030 serves as the sensing element in an eddy current measurement chain. It is installed near the monitored machine component and works together with the associated measuring electronics rather than operating as a standalone monitoring controller.

Industrial Applications

Installation and Maintenance

1. Confirm that the PR6424/001-030 is suitable for the intended EPRO measurement system and monitoring application.
2. Review the machinery drawings and probe installation documentation before mounting the sensor.
3. Isolate the relevant machinery and follow the plant’s mechanical and electrical safety procedures before installation.
4. Select a mounting position that provides the required relationship between the probe and the conductive target.
5. Keep the sensing area clean and free from contamination that could interfere with the installation.
6. Inspect the sensor body and cable connection for mechanical damage before commissioning.
7. Route the sensor cable away from unnecessary mechanical stress, sharp edges, and potential sources of interference.
8. Secure the sensor firmly so that vibration or movement of the mounting arrangement does not change the intended probe position.
9. Verify the probe connection to the associated measuring electronics before energizing the monitoring circuit.
10. Check the sensor signal during commissioning and confirm that the measurement responds appropriately to shaft movement.
11. Investigate unstable or abnormal readings by checking probe mounting, target condition, cable integrity, and associated measuring electronics.
12. Record the installed sensor model and measurement location for future machinery maintenance and condition-monitoring work.

Related Components

Recommended Related Models

Key Advantages

• Provides non-contact measurement for rotating machinery.
• Uses eddy current technology to monitor conductive machine targets.
• Suitable for continuous machinery condition monitoring.
• Supports shaft-related measurement applications without mechanical contact.
• Integrates into an EPRO sensor and measuring-electronics architecture.
• Useful for turbine, compressor, generator, pump, and other rotating equipment applications.

Technical FAQs

What type of target does the PR6424/001-030 measure?

The sensor uses an eddy current principle and therefore operates with a conductive metallic target. In rotating machinery applications, the monitored target is commonly a metallic shaft or another suitable machine surface.

Does the PR6424/001-030 directly provide a complete monitoring system?

No. The PR6424/001-030 is the sensing element within a larger measurement chain. It works with compatible EPRO measuring electronics and the associated machinery monitoring system to turn the sensor response into usable monitoring information.

Why is non-contact sensing useful for rotating machinery?

A non-contact probe can observe shaft movement without physically touching the rotating component. This avoids mechanical contact at the sensing point and allows continuous measurement during machine operation when the overall monitoring system is configured for that purpose.

What should be checked if the sensor measurement becomes unstable?

The probe mounting position, sensor condition, target surface, cable connections, and associated measuring electronics should be checked systematically. Mechanical movement of the probe or changes in the sensor-to-target relationship can also affect the measurement and should be investigated.