Product Overview

The Epro PR6423/010-020+CON021 combines an 8 mm Eddy Current Sensor with a CON021 Eddy Current Signal Converter for non-contact measurement of rotating machinery movement. The combination covers both the sensing element and associated signal-conversion stage, making it suitable for machinery monitoring arrangements where the probe signal must be conditioned before being evaluated by a monitoring system.

The PR6423/010-020 is positioned close to a conductive rotating target such as a shaft. It detects changes in the probe-to-target gap without physical contact. The CON021 processes the probe signal and converts the sensor response into a form suitable for the associated monitoring architecture.

This combination can be used around turbine and compressor bearings, where shaft vibration or displacement needs to be monitored continuously. The probe provides the mechanical measurement point, while the converter forms the interface between the eddy current sensing element and downstream monitoring equipment.

For maintenance engineers, the combination is particularly useful when replacing an existing probe-and-converter arrangement as a matched sensing chain. The probe mounting position, cable connections, target surface, and converter interface should all be checked during installation.

Technical Specifications

Product Features

The combined PR6423/010-020+CON021 package covers two stages of the eddy current measurement chain: physical shaft sensing and signal conversion.

Key characteristics include:

• Epro PR6423/010-020 eddy current sensor
• 8 mm sensor head diameter
• CON021 Eddy Current Signal Converter
• Non-contact measurement of conductive rotating targets
• Direct sensing of shaft-to-probe distance changes
• Suitable for shaft displacement and vibration-related measurements
• Combines sensing and signal-conversion functions
• Suitable for rotating machinery monitoring systems
• Applicable to turbine and compressor instrumentation
• Useful for machinery condition monitoring and protection applications
• Practical solution for replacing an existing probe and converter arrangement

Working Principle

The combination operates as a measurement chain in which the PR6423/010-020 detects mechanical movement and the CON021 handles the corresponding sensor signal.

Rotating Shaft → PR6423/010-020 → CON021 → Monitoring Electronics

1. Probe Excitation

   The PR6423/010-020 establishes an electromagnetic sensing field at the probe head.

2. Target Detection

   A conductive rotating shaft interacts with the electromagnetic field. The electrical response of the probe changes according to the distance between the probe and target.

3. Mechanical Movement Measurement

   Radial or axial movement changes the probe-to-shaft gap. The resulting electrical variation represents the mechanical movement detected by the sensing element.

4. Signal Conversion

   The CON021 receives the probe signal and performs the required signal-conditioning and conversion function for the downstream monitoring arrangement.

5. Monitoring System Input

   The converted signal can be evaluated by the associated machinery monitoring or protection system for condition monitoring, alarm processing, or protective functions.

The combined arrangement separates the mechanical sensing point from the signal-conversion stage, which is useful when the probe must be installed close to the shaft while the electronics are mounted at a more accessible location.

Role in a Rotating Machinery Monitoring Architecture

The PR6423/010-020+CON021 provides the front-end measurement path between the rotating shaft and the machinery monitoring system.

Shaft → PR6423/010-020 → CON021 → Monitoring / Protection System → Alarm or Control Action

Industrial Applications

The probe-and-converter combination is suitable for applications where the sensing point and signal-processing electronics form part of a continuous machinery monitoring chain.

Installation and Maintenance

1. Confirm the complete PR6423/010-020+CON021 combination before installation.
2. Verify the PR6423/010-020 probe model and 8 mm sensor head.
3. Confirm that the CON021 converter matches the intended probe arrangement.
4. Inspect the probe mounting location for contamination or mechanical damage.
5. Position the probe correctly relative to the conductive shaft or target.
6. Maintain the required probe-to-target clearance specified by the applicable measurement system.
7. Secure the probe to prevent movement caused by machine vibration.
8. Route the probe cable safely between the sensor and converter.
9. Check all electrical connections at the probe and CON021.
10. Verify the converted signal before placing the machinery into normal operation.
11. Compare the measurement with the expected shaft condition.
12. Recheck probe position after bearing, shaft, or housing maintenance.
13. Inspect the converter and associated wiring during scheduled instrumentation maintenance.

If the measurement becomes unstable, check the probe position, mechanical gap, shaft condition, cable connections, CON021 interface, and downstream monitoring electronics before replacing either component.

Related Components

Recommended Related Models

Key Advantages

• Combines the PR6423/010-020 8 mm eddy current sensor with a CON021 signal converter.
• Provides a complete probe-to-converter measurement chain.
• Uses non-contact sensing for conductive rotating targets.
• Suitable for shaft displacement and vibration-related monitoring.
• Separates the physical sensing point from the signal-conversion stage.
• Applicable to turbines, compressors, pumps, generators, and other rotating machinery.
• Suitable for continuous condition monitoring and machine protection systems.
• Useful for replacement of existing Epro probe-and-converter configurations.

Technical FAQs

What is included in the Epro PR6423/010-020+CON021 combination?

The combination includes the PR6423/010-020 8 mm Eddy Current Sensor and the CON021 Eddy Current Signal Converter. The two components form the sensing and signal-conversion stages of the measurement chain.

What function does the CON021 perform in this configuration?

The CON021 serves as the signal-conversion stage associated with the eddy current probe. It receives the probe signal and processes it for connection to the relevant downstream machinery monitoring architecture.

Why use the PR6423/010-020 together with a signal converter rather than treating the probe as a standalone device?

The probe detects the physical change in the shaft-to-probe relationship, while the converter handles the associated electrical signal interface. Using the two together creates a defined measurement path from the rotating machine to the monitoring system.

What should be checked when replacing a PR6423/010-020+CON021 assembly?

The replacement should be checked as a complete measurement chain. Engineers should verify the probe model, sensor head size, mounting position, probe-to-target clearance, cable connections, CON021 interface, and downstream monitoring-system configuration before returning the machine to service.