Product Overview

The Epro PR6423/012-130+CON021 combines an 8mm eddy current sensor with a CON021 eddy current signal converter for non-contact measurement of rotating machinery. The sensor monitors the relative position of a conductive shaft or target, while the signal converter conditions the probe signal for connection to the associated machinery monitoring system.

This combination is particularly useful where shaft displacement, vibration-related movement, or other changes in the relative position between the probe and rotating target need to be monitored continuously. The non-contact measurement method avoids physical contact between the probe and the rotating component during normal operation.

In a typical turbine, compressor, pump, motor, or generator installation, the sensor is mounted close to the monitored shaft. Changes in the probe-to-target relationship are converted into an electrical measurement signal and processed by the signal converter before being passed to the machinery monitoring or protection system.

The combined configuration also simplifies the sensor interface arrangement by pairing the PR6423/012-130 probe with the corresponding CON021 signal-conditioning component. This makes the assembly suitable for machinery instrumentation where stable proximity measurement is required at the monitoring point.

Technical Specifications

Product Features

• 8mm eddy current sensing arrangement
• Combined PR6423 sensor and CON021 signal converter configuration
• Non-contact measurement of conductive rotating targets
• Suitable for continuous machinery condition monitoring
• Supports measurement of relative shaft position and movement
• Suitable for turbine, compressor, pump, motor, and generator applications
• Signal conditioning between the proximity sensor and monitoring system
• Appropriate for machinery monitoring and protection architectures

Working Principle

The PR6423/012-130 operates by generating an electromagnetic field at the sensor tip. When the probe is positioned near a conductive shaft or other suitable metallic target, changes in the distance between the sensor and target affect the characteristics of the generated signal.

As the monitored shaft moves relative to the probe, the resulting change is detected by the sensor. This allows mechanical movement to be represented as an electrical measurement without requiring the probe to physically contact the rotating shaft.

The CON021 signal converter receives the sensor signal and performs the required signal conditioning before the measurement is transferred to the machinery monitoring system.

Rotating Shaft / Conductive Target → PR6423/012-130 Sensor → CON021 Signal Converter → Machinery Monitoring System → Alarm / Protection

Correct probe positioning is important because the measured signal depends on the relationship between the sensor and the conductive target. Probe alignment, installation stability, target condition, cabling, and signal-converter compatibility all affect measurement quality.

Role in Machinery Monitoring Architecture

The PR6423/012-130+CON021 assembly normally forms the sensing and signal-conditioning stage of a rotating machinery monitoring channel.

Machine Shaft → Eddy Current Sensor → Signal Converter → Monitoring System → Control / Protection

The sensor and converter do not independently determine the overall machine protection state. Final alarm, trip, trend, and diagnostic functions depend on the connected machinery monitoring system and its configured parameters.

Industrial Applications

Installation and Maintenance

1. Mount the PR6423/012-130 sensor securely at the specified measurement location.
2. Position the probe so that it has the correct relationship with the conductive target.
3. Verify that the sensor is properly aligned with the monitored shaft or target surface.
4. Check the mechanical mounting for looseness or unwanted movement.
5. Connect the sensor to the CON021 signal converter using the appropriate wiring arrangement.
6. Verify the signal-converter connections before energizing the monitoring channel.
7. Check the complete signal path from the probe through the converter to the monitoring system.
8. Confirm that the HMI or monitoring software displays the expected measurement.
9. Inspect the probe installation periodically for mechanical damage or contamination.
10. Check cables and connectors for looseness, deterioration, or physical damage.
11. Investigate unstable readings by checking probe alignment, target condition, wiring, and signal conditioning.
12. After replacing the sensor or converter, verify the measurement channel and configured monitoring limits before returning the machinery to normal operation.

Compatible System Components

Recommended Related Models

Key Advantages

• Combines the PR6423/012-130 sensor with a CON021 signal converter
• Enables non-contact monitoring of conductive rotating targets
• Suitable for continuous shaft movement measurement
• Separates mechanical sensing from downstream monitoring and protection functions
• Useful for machinery monitoring channels where stable proximity measurement is required
• Applicable to a broad range of high-speed rotating equipment
• Provides a practical sensor-to-monitoring interface for machinery instrumentation systems

Technical FAQs

What is the function of the CON021 in the PR6423/012-130+CON021 combination?

The CON021 serves as the signal-conditioning stage for the eddy current sensor. It processes the sensor signal so that the measurement can be transferred to the associated machinery monitoring system.

What type of target can the PR6423/012-130 measure?

The eddy current sensor works with suitable conductive targets, commonly metallic rotating machine components such as shafts. The target material and installation conditions influence the resulting measurement.

Why can the measured signal become unstable after sensor replacement?

An unstable signal can result from incorrect probe positioning, poor alignment, mechanical looseness, damaged cabling, an unsuitable target surface, or incorrect sensor-to-converter configuration. These conditions should be checked before replacing additional components.

Can the sensor assembly directly generate a machinery trip?

The sensor and signal converter provide the measurement channel, but the final alarm or trip decision normally belongs to the connected machinery monitoring or protection system. Trip behavior depends on the monitoring system configuration and its programmed limits