Product Overview

The Epro PR6423/010-130 is an 8 mm eddy current sensor for non-contact measurement of shaft movement and relative displacement in rotating machinery. It is used where the condition of a rotating shaft needs to be monitored without introducing mechanical contact between the probe and the machine component.

The sensor is suitable for applications involving shaft displacement, radial movement, and vibration-related measurements. Typical installations include steam turbines, gas turbines, compressors, pumps, generators, and other rotating equipment that requires continuous condition monitoring.

Because the eddy current principle measures the relationship between the probe and a conductive target, the sensor can monitor shaft movement while the machine remains in operation. This makes it useful for machinery protection systems where direct measurement of mechanical movement is required.

The PR6423/010-130 is normally integrated with the appropriate eddy current driver or signal conditioning electronics. During installation and troubleshooting, attention should be given to probe mounting, sensor wiring, target conditions, and the stability of the sensor-to-shaft relationship.

Technical Specifications

Product Features

• 8 mm eddy current sensor for non-contact measurement.
• Detects relative movement between the probe and conductive rotating targets.
• Suitable for shaft displacement and vibration-related monitoring.
• Operates without physical contact with the rotating shaft.
• Suitable for continuous rotating machinery monitoring.
• Applicable to turbines, compressors, pumps, generators, and similar equipment.
• Can be integrated into machinery protection and condition monitoring systems.
• Compact sensing configuration for installation close to rotating components.
• Works with associated eddy current driver and signal conditioning equipment.
• Suitable for applications requiring direct shaft movement measurement.

Working Principle

The PR6423/010-130 generates an electromagnetic field toward the conductive target of the rotating machine. As the distance between the probe and shaft changes, the electrical characteristics of the eddy current circuit also change. These changes correspond to relative shaft movement and can be used to determine displacement or vibration-related behavior.

The sensor is connected to the appropriate driver or signal conditioning electronics, which processes the probe response before the measurement is transferred to the machinery monitoring system.

Rotating Shaft → PR6423/010-130 Sensor → Eddy Current Driver / Signal Conditioning → Machinery Monitoring System → Alarm / Protection

For a stable measurement, the probe must remain firmly mounted while the shaft moves within the intended measurement range. A loose mounting point, damaged cable, poor connection, or change in probe positioning can appear as an abnormal measurement signal.

Role in a Rotating Machinery Monitoring Architecture

The PR6423/010-130 serves as the machine-side sensing element of an eddy current monitoring system. It detects shaft movement directly and passes the resulting sensor signal to the associated electronics for conditioning and evaluation.

Rotating Machine → PR6423/010-130 → Signal Conditioning → Monitoring Module → Protection / Control System

Industrial Applications

Installation and Maintenance

1. Mount the sensor securely in the specified measurement position.
2. Ensure the probe is correctly oriented toward the monitored shaft.
3. Maintain a stable probe-to-target relationship during machine operation.
4. Prevent the probe from contacting the rotating shaft.
5. Secure the sensor cable against vibration and mechanical movement.
6. Avoid sharp bends or excessive tension on the sensor cable.
7. Inspect connectors and terminations before commissioning.
8. Verify the connection between the sensor and its associated driver.
9. Confirm that the monitoring system receives a stable measurement signal.
10. Compare the initial reading with known normal machine operating conditions.
11. Inspect the probe mounting and cable condition during scheduled maintenance.
12. Before replacing the sensor, verify the model, installation position, associated electronics, wiring, and monitoring configuration.

Related Components

Recommended Related Models

Key Advantages

• Non-contact measurement of rotating shaft movement.
• 8 mm sensor configuration for rotating machinery applications.
• Suitable for shaft displacement and vibration-related monitoring.
• No physical contact with the rotating target during normal operation.
• Compatible with appropriate eddy current driver and signal conditioning equipment.
• Suitable for turbines, compressors, pumps, generators, and other rotating machinery.

Technical FAQs

What measurement applications are suitable for the PR6423/010-130?

The sensor can be used for non-contact measurement of relative shaft movement, including shaft displacement and vibration-related movement in rotating machinery. The final measurement function depends on the mechanical installation and monitoring system.

Why should the sensor mounting be checked when troubleshooting an abnormal signal?

The eddy current sensor measures the relationship between the probe and the conductive target. If the probe itself moves because of a loose mounting arrangement or machine vibration, the monitoring system may detect this movement as part of the measurement.

What equipment is normally used between the PR6423/010-130 and the monitoring system?

An appropriate eddy current driver or signal conditioning interface is normally used between the sensor and the machinery monitoring input. The exact interface should be matched to the sensor and the existing monitoring architecture.

What should be checked after installing a replacement sensor?

Check the sensor model, physical installation position, probe-to-target relationship, cable connections, associated driver, and monitoring-system input. The resulting signal should also be compared with the expected machine condition before the equipment is returned to normal operation.