Product Overview

The Epro PR6423/010-000-CN+CON021 8mm Eddy Current Sensor + Eddy Current Signal Converter combines an Epro PR6423 proximity sensor with a CON021 signal converter for use in non-contact rotating machinery measurement systems.

The PR6423/010-000-CN detects changes in the distance between the probe tip and a conductive machine target, while the CON021 handles the associated signal-conversion stage. Together, they form the front end of a proximity measurement channel used to transfer physical shaft movement into an electrical measurement that can be evaluated by downstream monitoring equipment.

This configuration is particularly relevant to machinery where continuous observation of shaft displacement, position, or vibration-related movement is required. Typical installations can be found around turbines, compressors, generators, pumps, and other high-speed rotating equipment.

Unlike a standalone proximity probe, the PR6423/010-000-CN+CON021 combination represents a sensor-and-converter arrangement. For maintenance and replacement work, both the probe model and converter configuration should be identified before installation.

Technical Specifications

Product Features

The PR6423/010-000-CN+CON021 configuration combines the sensing and signal-processing stages into a single identified measurement arrangement.

Key characteristics include:

• Epro PR6423 eddy-current sensing technology
• PR6423/010-000-CN proximity sensor
• CON021 Eddy Current Signal Converter
• 8 mm sensor head diameter
• Non-contact measurement of conductive targets
• Suitable for shaft displacement monitoring
• Applicable to shaft position measurements
• Suitable for vibration-related monitoring
• Provides a defined probe-to-converter signal path
• Suitable for rotating machinery condition monitoring
• Useful in turbine monitoring applications
• Suitable for maintenance and replacement projects

The probe and converter have separate functions. If a measurement channel develops a fault, each stage should be evaluated rather than assuming that both components have failed.

Working Principle

The combined PR6423/010-000-CN+CON021 arrangement converts mechanical movement into a usable monitoring signal through several stages.

Rotating Target → PR6423/010-000-CN → CON021 → Monitoring Electronics

1. Proximity Detection

The PR6423/010-000-CN generates an electromagnetic field at its sensing tip. When positioned near a conductive target, such as a rotating shaft, the field interacts with the target.

2. Eddy-Current Response

The conductive target develops eddy currents in response to the electromagnetic field. Changes in the probe-to-target distance modify the electrical response detected by the sensing circuit.

3. Signal Conversion

The resulting probe signal is transferred to the CON021 Eddy Current Signal Converter. The converter conditions and converts the sensor response into a form suitable for the subsequent monitoring stage.

4. Monitoring Input

The converted signal is then supplied to compatible monitoring equipment. Depending on the installation, the resulting information can represent shaft displacement, position, or dynamic movement.

5. Machine Condition Assessment

The monitoring system compares the measured condition against configured operating limits or expected machine behavior, allowing abnormal shaft movement to be identified.

The complete process can therefore be viewed as:

Mechanical Movement → Gap Variation → Eddy-Current Response → Signal Conversion → Monitoring

Role in a Rotating Machinery Monitoring System

The combined sensor and converter normally occupy the measurement front end of a machinery monitoring channel.

A typical arrangement is:

Rotating Shaft → PR6423/010-000-CN → CON021 → Monitoring Module → Machinery Protection / Control System

This arrangement makes the sensor and converter complementary components rather than interchangeable alternatives.

Industrial Applications

The specific monitored parameter depends on the mechanical position of the probe and the configuration of the associated monitoring system.

Installation and Maintenance

The accuracy of an eddy-current measurement depends heavily on the physical relationship between the probe and the monitored target. Installation should therefore address both the PR6423 sensor and CON021 converter.

Recommended practices include:

• Confirm the complete PR6423/010-000-CN+CON021 configuration.
• Verify the PR6423/010-000-CN probe model.
• Confirm the 8 mm sensor head diameter.
• Identify the correct measurement location.
• Inspect the probe tip before installation.
• Verify the mechanical mounting arrangement.
• Establish the appropriate probe-to-target gap.
• Check probe alignment with the shaft or target.
• Inspect sensor cables and connectors.
• Verify the probe-to-CON021 connection.
• Confirm converter wiring and installation.
• Check the monitoring-channel configuration.
• Verify the converted signal under known operating conditions.
• Compare measurements with expected shaft behavior.
• Inspect for loose mounting if readings become intermittent.
• Check cable routing for mechanical damage or connection issues.
• Record the final probe location and channel assignment.

When troubleshooting, separating the sensing stage from the conversion stage can help narrow down the fault. An unstable signal does not necessarily indicate a defective probe.

Related Components

Recommended Related Models

Key Advantages

• Epro PR6423/010-000-CN+CON021 configuration.
• Includes an 8 mm eddy-current sensor.
• Includes CON021 Eddy Current Signal Converter.
• Non-contact measurement principle.
• Suitable for conductive rotating-machine targets.
• Supports shaft displacement and position monitoring.
• Applicable to vibration-related measurements.
• Combines sensing and signal-conversion stages.
• Suitable for turbine and rotating-equipment monitoring.
• Useful for maintenance and replacement of complete measurement channels.

Technical FAQs

What makes the PR6423/010-000-CN+CON021 different from the standalone PR6423/010-000-CN?

The standalone PR6423/010-000-CN refers to the sensing element, while the +CON021 configuration also includes the associated Eddy Current Signal Converter. The combined arrangement therefore represents a broader section of the proximity measurement chain.

How does shaft alignment affect an eddy-current measurement?

The probe must maintain the intended geometric relationship with the monitored target. Misalignment can alter the effective sensing conditions and may produce measurements that do not accurately represent the actual shaft movement.

If the probe signal is present but the monitoring system shows an abnormal value, what should be checked?

The investigation should move beyond the probe itself. Check the CON021 converter, interconnecting cables, connector condition, monitoring-channel configuration, and the expected signal characteristics before replacing the sensor.

Why is the PR6423/010-000-CN+CON021 useful for rotating machinery condition monitoring?

It combines non-contact proximity sensing with signal conversion, allowing mechanical movement of a conductive target to be transformed into a signal that can be evaluated by a machinery monitoring or protection system.