Product Overview

The Epro PR6423/10R-030+CON021 combines an 8 mm eddy current sensor with a CON021 eddy current signal converter for non-contact monitoring of rotating machinery. The combination forms a measurement channel that detects relative movement between a conductive machine target and the sensor, then conditions the resulting signal for use by compatible monitoring equipment.

The PR6423 sensor is typically positioned near a conductive shaft or rotor surface in applications where direct mechanical contact would be unsuitable. It can be used to observe shaft displacement, radial movement, axial position, or vibration-related changes on turbines, compressors, generators, motors, and other rotating equipment.

The CON021 signal converter handles the interface and conditioning stage between the sensor and the downstream monitoring system. Keeping the sensor and converter as a defined combination helps maintain the intended measurement arrangement during installation, replacement, and troubleshooting.

For maintenance teams, an abnormal signal should not immediately be attributed to the sensor. Probe alignment, target condition, installation gap, cable connections, converter operation, and the receiving monitoring channel should be checked as a complete measurement path.

Technical Specifications

Product Features

• Combined PR6423 8 mm eddy current sensor and CON021 signal converter.
• Provides non-contact sensing of conductive rotating machinery targets.
• Suitable for shaft displacement, position, and vibration-related measurements.
• Integrates sensing and signal-conditioning functions within a defined measurement channel.
• Applicable to turbines, compressors, generators, motors, pumps, and other rotating equipment.
• Suitable for continuous machinery condition-monitoring systems.
• Supports installations where the sensor must operate without physical contact with the shaft.
• Useful for replacement and maintenance of compatible Epro eddy current measurement channels.

Working Principle

The PR6423 sensor operates by generating an electromagnetic field around its sensing tip. When the probe is positioned near a conductive shaft or target, eddy currents are induced in the target. Changes in the target-to-probe distance alter the electrical response of the sensing circuit.

The resulting sensor signal is transferred to the CON021 signal converter, which conditions the signal for the receiving monitoring equipment. The downstream system can use the conditioned measurement for shaft position, displacement, vibration-related monitoring, alarm, or protection functions according to the installed system configuration.

Conductive Shaft / Target → PR6423/10R-030 Sensor → CON021 Signal Converter → Monitoring System → Alarm / Protection

The measurement depends on the complete installation. Probe gap, alignment, target material and surface condition, cable integrity, converter operation, and downstream input compatibility can all affect the final signal.

Role in an Epro Eddy Current Monitoring Architecture

The PR6423/10R-030+CON021 covers the sensing and signal-conditioning stages of an eddy current monitoring channel. The sensor establishes the physical measurement point at the rotating machine, while the converter prepares the sensor response for the associated monitoring equipment.

Rotating Shaft → PR6423 Sensor → CON021 Converter → Monitoring Input → Machinery Monitoring System → Alarm / Protection

The sensor and converter should be considered together during commissioning, while the output interface must still be matched to the receiving monitoring equipment.

Industrial Applications

Installation and Maintenance

1. Verify the complete PR6423/10R-030+CON021 part number before installation.
2. Confirm that the PR6423 sensor and CON021 converter combination matches the intended monitoring architecture.
3. Isolate the rotating equipment and follow the applicable site safety procedure before installation or maintenance.
4. Inspect the sensor tip for contamination, impact damage, or other physical abnormalities.
5. Verify the probe mounting arrangement and establish the required relationship between the sensor and conductive target.
6. Maintain the specified probe-to-target installation condition according to the applicable Epro system requirements.
7. Check probe alignment and ensure that the mounting structure remains mechanically secure during operation.
8. Inspect sensor and converter cabling for damage, loose terminations, excessive bending, or environmental exposure.
9. Verify the CON021 converter connections and confirm that the signal path is correctly terminated.
10. Check the conditioned output after installation and compare the measurement with expected machine operating conditions.
11. If the signal is unstable or missing, inspect the probe position, target surface, cable, converter, and monitoring input before replacing the sensor.
12. After replacement, perform a complete measurement-channel and machinery-monitoring functional test before returning the equipment to normal operation.

Compatible System Components

Recommended Related Models

Key Advantages

• Combines an 8 mm eddy current sensor with a CON021 signal converter.
• Provides a defined non-contact measurement path for compatible monitoring systems.
• Suitable for shaft displacement, position, and vibration-related monitoring.
• Supports continuous measurement on critical rotating machinery.
• Reduces the need for separate sensor and signal-conditioning components in the defined configuration.
• Useful for maintenance and replacement of compatible PR6423 measurement channels.

Technical FAQs

What distinguishes the PR6423/10R-030+CON021 from a standalone PR6423 sensor?

This configuration includes both the PR6423 sensor and a CON021 signal converter. The converter forms the signal-conditioning stage, so the combination represents a more complete measurement channel than the sensor alone.

Why must the probe-to-target relationship be checked during commissioning?

The eddy current measurement responds to the relative distance between the probe and conductive target. Incorrect positioning, alignment changes, or mechanical movement can therefore affect the measured signal even when the sensor and converter are operating normally.

What should be checked if the CON021 output is present but the monitoring system shows an abnormal value?

Check the sensor installation, target surface, probe-to-target relationship, cable connections, and converter output characteristics. The receiving monitoring input should then be checked to confirm that it is compatible with the conditioned signal.

Can the sensor and converter be replaced independently?

Replacement should follow the configuration of the installed measurement system. The sensor, converter, cabling, and receiving input should be checked as a complete channel so that the replacement does not introduce a mismatch between the sensing and signal-conditioning stages.