Product Overview

The Epro PR6424/000-121 16mm Eddy Current Sensor is a non-contact sensor for measuring displacement and position on rotating machinery. It uses an eddy current measurement principle to detect changes in the distance between the sensor and a conductive target without making physical contact with the moving component.

The sensor is suited to machinery monitoring points where shaft movement needs to be measured continuously. Typical applications include steam turbines, gas turbines, compressors, pumps, generators, gearboxes, and other rotating equipment.

The PR6424/000-121 is normally integrated with suitable signal-conditioning and monitoring electronics. Its measurement signal can then be evaluated for machinery condition monitoring, alarm handling, and protection functions.

Technical Specifications

Product Features

• 16 mm eddy current sensor for industrial rotating machinery monitoring.
• Non-contact measurement of conductive targets.
• Suitable for shaft displacement and position measurement.
• Can be integrated into machinery condition monitoring and protection systems.
• Suitable for turbines, compressors, pumps, generators, and other rotating equipment.
• Supports continuous monitoring of shaft movement at selected measurement points.
• Can operate as part of a complete sensor and signal-conditioning measurement channel.

Working Principle

The PR6424/000-121 generates an electromagnetic field at the sensor tip and detects changes caused by the proximity of a conductive target. The electrical response varies as the distance between the probe and target changes.

When the monitored shaft moves, the measurement gap changes. The resulting electrical signal is transferred to the associated signal-conditioning electronics, where it can be converted and evaluated by the machinery monitoring system.

A typical measurement path is:

Rotating Shaft → PR6424/000-121 Sensor → Signal Conditioning → Machinery Monitoring System → Alarm / Protection

The probe mounting position and the relationship between the sensor tip and conductive target have a direct effect on measurement quality.

Role in a Rotating Machinery Control Architecture

Industrial Applications

Installation and Maintenance

1. Install the sensor with the sensing tip facing the intended conductive target.
2. Maintain the required probe-to-target relationship for the measurement application.
3. Secure the sensor firmly to prevent movement caused by machinery vibration.
4. Check the mounting arrangement before commissioning the monitoring channel.
5. Route the sensor cable away from strong electrical interference sources where practical.
6. Avoid excessive bending, pulling, or mechanical stress on the cable.
7. Verify sensor and signal-conditioning connections before starting the machinery monitoring system.
8. Inspect the sensor tip periodically for contamination or physical damage.
9. Check the probe position if the measurement signal changes unexpectedly.
10. Inspect cabling and connectors when intermittent or unstable readings occur.
11. Compare unusual displacement trends with actual machinery operating conditions before replacing the sensor.
12. Verify the complete measurement channel after maintenance before returning the equipment to normal operation.

Related Components

Recommended Related Models

Key Advantages

• Non-contact measurement for rotating machinery.
• 16 mm sensor head configuration.
• Suitable for shaft displacement and position monitoring.
• Applicable to continuous machinery monitoring channels.
• Supports machinery protection and condition assessment.
• Suitable for integration with associated signal-conditioning electronics.

Technical FAQs

What is the Epro PR6424/000-121 used for?

The PR6424/000-121 is used for non-contact measurement of displacement and position of conductive targets, particularly in rotating machinery monitoring applications.

Can the PR6424/000-121 be used for shaft monitoring?

Yes. The sensor can be incorporated into a shaft monitoring channel where changes in the distance between the probe and a conductive shaft target need to be detected.

Why is an eddy current sensor suitable for rotating machinery?

The measurement does not require physical contact with the rotating component. This allows shaft movement to be monitored continuously while avoiding mechanical wear at the sensing point.

What should be checked if the PR6424/000-121 produces an abnormal signal?

Check the probe mounting, sensor position, cable connections, signal-conditioning electronics, and possible electrical interference. The actual machinery operating condition should also be reviewed before determining whether the sensor or another part of the measurement channel is responsible.