Product Overview

The Epro PR6423/013-000+CON021 combines an 8 mm eddy current sensor with a CON021 eddy current signal converter to form a complete front-end measurement arrangement for non-contact machinery monitoring. The sensor detects changes in the distance between the probe and a conductive target, while the converter conditions the resulting measurement signal for connection to downstream monitoring equipment.

This combination is suitable for rotating machinery where shaft displacement, vibration-related movement, or other changes in the position of a conductive target need to be monitored continuously. Typical equipment includes turbines, compressors, generators, pumps, and other machinery with rotating shafts requiring condition monitoring or protection.

The integrated sensor-and-converter arrangement simplifies the measurement path between the mechanical target and the machinery monitoring system. The probe is installed close to the monitored shaft, while the CON021 handles the associated signal-conditioning function before the measurement is transferred to the monitoring or protection system.

For maintenance work, the sensor and converter should be treated as a measurement chain rather than two completely independent components. Probe installation, sensing gap, cable connections, converter condition, and downstream monitoring inputs all need to be considered when investigating abnormal measurements.

Technical Specifications

Product Features

• Combines an Epro PR6423 8 mm eddy current sensor with a CON021 signal converter.
• Supports non-contact measurement of conductive machinery targets.
• Suitable for shaft displacement and vibration-related monitoring.
• Provides signal conditioning between the sensor and downstream monitoring equipment.
• Suitable for rotating machinery condition-monitoring systems.
• Applicable to turbines, compressors, generators, pumps, and industrial rotating equipment.
• Useful where a complete sensor-to-monitoring measurement path is required.

Working Principle

The PR6423/013-000 sensor detects changes in the electromagnetic field caused by variations in the distance between the probe and a conductive target. On rotating machinery, the shaft normally serves as the conductive target, and radial or axial movement changes the probe-to-target relationship.

The resulting sensor response is transferred to the CON021 eddy current signal converter. The converter conditions the probe signal so that it can be used by the associated machinery monitoring or protection equipment.

Conductive Shaft / Target → PR6423/013-000 Sensor → CON021 Signal Converter → Machinery Monitoring System → Alarm / Protection

A stable measurement therefore depends on both the mechanical installation of the probe and the electrical condition of the converter path. Incorrect probe positioning, damaged cabling, poor connections, or converter problems can all affect the final measurement.

Role in a Machinery Monitoring Architecture

The PR6423/013-000+CON021 combination forms the sensing and signal-conditioning stage of a machinery monitoring system.

Rotating Shaft → PR6423/013-000 → CON021 → Monitoring System → Alarm / Protection

This arrangement separates the physical sensing function from signal conditioning and higher-level machinery monitoring, making fault isolation easier during commissioning and maintenance.

Industrial Applications

Installation and Maintenance

1. Confirm that the PR6423/013-000+CON021 combination is compatible with the intended machinery monitoring system.
2. Verify the sensor and CON021 signal converter configuration before installation.
3. Mount the PR6423 sensor securely near the intended conductive target.
4. Set and verify the probe-to-target gap according to the applicable installation requirements.
5. Check that the monitored shaft or target provides a suitable conductive surface.
6. Route the sensor cable to avoid excessive mechanical stress, abrasion, and interference sources.
7. Verify all sensor and converter connections before applying system power.
8. Confirm that the CON021 is correctly connected to the downstream monitoring equipment.
9. Check the measurement signal during commissioning for stable and repeatable behavior.
10. Inspect the probe mounting and sensing gap if the measurement changes unexpectedly.
11. Check the sensor cable, connectors, and CON021 when the measurement signal is missing or unstable.
12. After replacing either the sensor or converter, verify the complete measurement chain before returning the machinery protection or monitoring system to service.

Compatible System Components

Recommended Related Models

Key Advantages

• Combines sensing and signal-conditioning functions in one measurement arrangement.
• Uses non-contact eddy current measurement for conductive rotating targets.
• Suitable for shaft displacement and vibration-related applications.
• Provides a defined signal path from the machinery target to monitoring equipment.
• Useful for turbine, compressor, generator, and pump monitoring.
• Simplifies troubleshooting by allowing the sensor and converter stages to be checked separately.

Technical FAQs

What is the difference between the PR6423/013-000 and the PR6423/013-000+CON021?

The PR6423/013-000 is the eddy current sensing element, while the PR6423/013-000+CON021 combines that sensor with a CON021 signal converter for signal-conditioning functions.

Where should the CON021 be considered in the measurement chain?

The CON021 is positioned after the eddy current sensor and before the machinery monitoring equipment. It processes the sensor response into a signal suitable for the associated monitoring or protection system.

What can cause a correct sensor to produce an abnormal system reading?

A correct probe can still produce an abnormal reading if the sensing gap is incorrect, the probe mounting is unstable, the cable or connector is damaged, the CON021 has a problem, or the downstream monitoring input is improperly configured.

Should the sensor and CON021 be tested separately during troubleshooting?

Yes. Checking the probe installation and target relationship first, followed by the sensor connection and CON021 signal-conditioning stage, can help determine whether the problem originates at the mechanical sensing point or later in the measurement chain.