EPRO CON021+PR6423/012-030 Eddy Current Displacement Sensor System

Overview

The EPRO PR6423/012-030 + CON021 system is a high-precision, non-contact eddy current measurement solution engineered for critical rotating machinery. It accurately monitors shaft displacement, vibration, and eccentricity, supporting predictive maintenance and machine protection in turbines, compressors, pumps, and industrial gearboxes. This solution ensures real-time data acquisition with API 670-compliant signal conditioning.

Components

PR6423/012-030 Sensor Probe
The PR6423/012-030 is an 8 mm eddy current sensor designed for measuring dynamic radial and axial shaft displacement. It provides precise readings on vibration, position, eccentricity, and rotational speed. It is optimized for ferromagnetic shafts, such as 42CrMo4 or AISI 4140 steel, and is ideal for sleeve-bearing machines where case-mounted probes are ineffective.

Technical Specifications – PR6423/012-030

• Linear Measurement Range: 2 mm (80 mils)

• Initial Air Gap: 0.5 mm (20 mils)

• Sensitivity (ISF): 8 V/mm ±5% (203.2 mV/mil) at 0–45 °C

• Linearity: ±0.025 mm (±1 mil) within 0–45 °C

• Minimum Shaft Diameter: 25 mm (0.98 in)

• Operating Temperature: –40 °C to +150 °C

• Protection Class: IP66 (IEC 60529)

• Target Material: Ferromagnetic steel (standard: 42CrMo4 / AISI 4140)

CON021 Converter Module

The CON021 serves as a dedicated signal conditioner and converter for PR6423 probes. It delivers a stable, linear output suitable for integration with vibration monitoring and control systems, meeting API 670 standards for reliability.

Technical Specifications – CON021

• Frequency Response: 0–20,000 Hz (–3 dB)

• Rise Time: <15 μs

• Supply Voltage: –23 V to –32 V DC

• Output Range: –4 V to –20 V (configurable)

• Operating Temperature: –30 °C to +100 °C

• Protection Class: IP20

• Housing Material: LMgSi Alloy

Applications

• Power Generation: Steam and gas turbine shaft vibration analysis

• Petrochemical: Axial displacement monitoring in pumps and compressors

• Industrial Machinery: Gearbox vibration detection, rotor eccentricity inspection

FAQ

Q: What type of shafts is the PR6423/012-030 compatible with?
A: Designed for conductive ferromagnetic materials such as 42CrMo4 or AISI 4140 steel, with a minimum diameter of 25 mm.

Q: Can the CON021 operate in high-temperature environments?
A: Yes, the module functions reliably up to 100 °C and can be integrated in standard panel-mounted configurations.

Q: How is the output signal configured?
A: The CON021 provides a linear voltage output from –4 V to –20 V, adjustable per system requirements.

Comparison with Similar Models
The PR6423/012-030 offers higher linearity and temperature tolerance than standard 5 mm eddy current probes, with improved sensitivity for predictive maintenance applications.