Product Overview

The Epro PR6423/013-030+CON021 combines an 8 mm PR6423 series eddy current sensor with a CON021 eddy current signal converter. The sensor performs non-contact detection of changes in the position of a conductive target, while the converter handles the associated signal-conditioning stage for the machinery monitoring circuit.

This combination is suited to rotating equipment where direct contact with the monitored component is undesirable. A typical installation places the PR6423/013-030 close to a rotating shaft, allowing changes in shaft position or movement to be detected during operation.

The CON021 forms the electrical interface between the sensor and the downstream monitoring equipment. Together, the sensor and converter establish a measurement channel that can be connected to machinery monitoring and protection systems used on turbines, compressors, generators, pumps, and other rotating equipment.

For commissioning and service work, the complete measurement path should be considered when investigating an abnormal reading. Probe mounting, target clearance, sensor cabling, CON021 connections, and the receiving monitoring channel can each influence the final measurement.

Technical Specifications

Product Features

• Combines the Epro PR6423/013-030 8 mm eddy current sensor with a CON021 signal converter.
• Supports non-contact measurement of conductive machinery targets.
• Suitable for shaft position, displacement, and vibration-related monitoring.
• Provides a dedicated signal-conditioning stage between the sensor and monitoring equipment.
• Suitable for rotating machinery condition-monitoring applications.
• Applicable to turbines, compressors, generators, pumps, and other industrial machinery.
• Can be incorporated into machinery alarm and protection measurement channels.

Working Principle

The PR6423/013-030 detects changes in the distance between the sensing head and a conductive target through an eddy current measurement process. When the probe is installed near a rotating shaft, radial or axial movement changes the probe-to-shaft relationship and therefore changes the sensor response.

The sensor output is connected to the CON021 signal converter, which conditions the eddy current signal for the downstream measurement system. The resulting signal can then be evaluated by compatible machinery monitoring equipment.

Conductive Shaft / Target → PR6423/013-030 Sensor → CON021 Signal Converter → Machinery Monitoring System → Alarm / Protection

The quality of the final measurement depends on the entire chain. A mechanically loose probe, incorrect sensing gap, damaged cable, poor connection, converter problem, or monitoring-input fault can produce symptoms that appear to originate from the sensor.

Role in a Machinery Monitoring Architecture

The PR6423/013-030+CON021 serves as the sensing and signal-conditioning section at the front of a machinery monitoring channel.

Rotating Shaft → PR6423/013-030 → CON021 → Monitoring System → Alarm & Protection

The two-stage front end allows the mechanical sensing point and electrical signal-conditioning stage to be checked independently during troubleshooting.

Industrial Applications

Installation and Maintenance

1. Confirm that the PR6423/013-030+CON021 combination is compatible with the intended monitoring application.
2. Verify the sensor and CON021 configuration before installation.
3. Mount the PR6423/013-030 securely at the designated measurement location.
4. Position the sensing head relative to the conductive target according to the applicable installation requirements.
5. Verify the probe-to-target gap before commissioning the machinery.
6. Confirm that the monitored target has suitable conductive characteristics and geometry.
7. Route the sensor cable to minimize mechanical stress, abrasion, and accidental damage.
8. Inspect sensor, converter, and connector connections before applying system power.
9. Check the conditioned measurement signal during commissioning for stable and repeatable operation.
10. Inspect probe mounting and target clearance if the measurement becomes intermittent or inconsistent.
11. Check the sensor cable, connections, and CON021 when the signal is missing or outside the expected behavior.
12. After replacing the sensor or converter, verify the complete measurement channel before returning the machinery monitoring or protection system to service.

Compatible System Components

Recommended Related Models

Key Advantages

• Combines an 8 mm PR6423 sensing element with CON021 signal conditioning.
• Supports non-contact measurement of conductive rotating targets.
• Suitable for shaft displacement and vibration-related monitoring.
• Establishes a direct sensor-to-monitoring measurement path.
• Applicable to turbines, compressors, generators, pumps, and other rotating equipment.
• Allows the sensing and signal-conditioning stages to be isolated during troubleshooting.

Technical FAQs

What role does the CON021 play in the PR6423/013-030+CON021 combination?

The CON021 acts as the signal-conditioning stage between the PR6423/013-030 sensor and the downstream machinery monitoring equipment. It processes the sensor response so it can be used by the associated monitoring channel.

What type of machinery movement can this combination monitor?

It can be used to detect changes in the relative position between the probe and a conductive target. On rotating machinery, this can support shaft displacement and vibration-related measurement applications.

Why should the probe gap be checked before replacing the sensor?

An incorrect probe-to-target gap can produce abnormal measurements even when the sensor itself is functioning correctly. Checking the mechanical installation first helps avoid replacing a healthy sensing element unnecessarily.

How can a fault be isolated between the PR6423 sensor and CON021?

The troubleshooting process should begin with probe mounting, target clearance, and cable condition. The sensor connections and CON021 should then be checked before investigating the downstream monitoring input, allowing the fault to be narrowed down by measurement-chain stage.