Product Overview

The Epro PR6423/001-011-CN+CON021 combines an 8 mm eddy current sensor with a CON021 eddy current signal converter, forming a complete sensing and signal-conditioning arrangement for rotating machinery.

The PR6423 sensor performs non-contact detection of the relative position between the probe and a conductive machine surface. The CON021 converter processes the probe signal so that the measurement can be transferred to the associated machinery monitoring system.

This configuration is suitable for applications where continuous monitoring of shaft movement, displacement, or other changes in the probe-to-target relationship is required. Because the sensor operates without physical contact, it can remain fixed while the monitored shaft rotates.

Technical Specifications

Main Features

• Epro PR6423 series eddy current sensor
• Integrated CON021 signal converter arrangement
• 8 mm sensor head
• Non-contact measurement of conductive machine targets
• Suitable for monitoring shaft movement and displacement
• Designed for rotating machinery applications
• Converts changes in probe-to-target distance into a usable measurement signal
• Suitable for continuous machinery monitoring
• Can be integrated with machinery monitoring and protection systems
• Useful for turbine, compressor, pump, and generator applications

Working Principle

The PR6423 sensor uses an electromagnetic field to detect changes in the distance between the probe tip and a conductive target.

When the probe is positioned near a metal shaft, eddy currents are generated in the target. The interaction between the probe’s electromagnetic field and these eddy currents varies with the distance between the probe and shaft.

The complete measurement path can be represented as:

Rotating Shaft → PR6423 Sensor → CON021 Converter → Monitoring System

As the shaft moves relative to the probe, the electrical characteristics of the sensor change. The CON021 converter processes the resulting probe signal and provides the appropriate signal interface for the downstream monitoring equipment.

The non-contact measurement principle allows the sensor to monitor a rotating component without introducing mechanical contact between the probe and shaft.

Shaft Displacement Monitoring

The PR6423/001-011-CN+CON021 arrangement can be used to observe changes in the position or movement of rotating machinery components.

Depending on the installation configuration, typical monitoring functions can include:

• Shaft displacement
• Radial shaft movement
• Axial position
• Rotor position
• Shaft movement associated with vibration
• Probe-to-target gap changes

For critical machinery, the resulting measurement can be incorporated into a larger monitoring system where abnormal shaft movement can be detected and evaluated.

The actual measurement application depends on probe installation, target characteristics, converter configuration, and the connected monitoring equipment.

Industrial Applications

The sensor-and-converter arrangement is especially useful for machinery that requires continuous monitoring while operating at normal rotational speed.

Installation and Maintenance

The probe should be installed securely and positioned correctly in relation to the conductive machine target.

Important installation considerations include:

• Probe mounting position
• Probe-to-target gap
• Target shaft material
• Shaft surface condition
• Sensor cable routing
• Sensor and converter connections
• Converter power supply
• Monitoring-system input
• Mechanical stability of the probe mounting

The sensor should not be allowed to move independently of the machine structure. Unwanted probe movement can be interpreted as shaft movement and affect the measurement.

During maintenance, inspect the sensor tip, cable, connectors, and converter connections. If the measurement signal becomes unstable, check the mechanical gap first, followed by the wiring, converter, monitoring input, and target shaft condition.

Related Components

The PR6423/001-011-CN+CON021 should be treated as part of a complete measurement channel. Proper matching of the sensor, converter, cabling, and monitoring system is important when replacing or configuring the system.

Recommended Related Models

When selecting a replacement, the complete measurement chain should be considered, including sensor specification, converter compatibility, cable arrangement, mounting method, and monitoring-system input.

Key Advantages

• Combines an Epro PR6423 sensor with a CON021 signal converter
• Non-contact eddy current measurement
• 8 mm sensor head
• Suitable for conductive rotating targets
• Supports shaft displacement monitoring
• Suitable for continuous machinery monitoring
• No physical contact with the rotating shaft
• Useful for turbines, compressors, pumps, and generators
• Can form part of a machinery protection or condition-monitoring channel
• Suitable for maintenance and replacement applications

Technical FAQs

What is the Epro PR6423/001-011-CN+CON021 used for?

The PR6423/001-011-CN+CON021 is a combined eddy current sensing and signal-conversion arrangement used for non-contact monitoring of shaft position, displacement, or movement in rotating machinery.

What is the function of the CON021 in this configuration?

The CON021 processes the electrical signal generated by the PR6423 eddy current sensor and provides the corresponding signal interface for the associated monitoring equipment.

Why is an eddy current sensor suitable for rotating machinery?

The measurement is performed without physical contact. The probe can therefore monitor a rotating conductive shaft while remaining stationary, avoiding direct mechanical wear at the measurement point.

What should be checked when replacing this sensor assembly?

The sensor model, converter, probe-to-target gap, cable connections, mounting arrangement, target shaft characteristics, and monitoring-system input should all be verified. Treating the sensor and converter as part of the same measurement channel helps avoid compatibility and signal problems.