Epro CON041+PR6423/002-031 Eddy Current Sensor System

Product Description

The PR6423/002-031 + CON041 measurement assembly is an eddy-current based proximity sensing solution developed by Emerson EPRO for continuous monitoring of rotating shafts. It is designed to capture small mechanical movements such as radial vibration, axial shift, and shaft orbit behavior in high-speed machinery.

The PR6423/002-031 probe is an 8 mm non-contact sensor that detects displacement relative to a conductive target surface. It operates together with the CON041 signal converter, which supplies excitation energy, processes the returning signal, and outputs a proportional analog voltage suitable for integration into protection and condition monitoring systems.

This configuration is typically selected for installations requiring fast signal response and consistent measurement stability, particularly in turbomachinery environments aligned with API 670 monitoring practices.

Technical Specifications

PR6423/002-031 Eddy Current Probe

• Measurement principle: Eddy-current, non-contact displacement sensing

• Probe diameter: 8 mm

• Measurement span: 0 to 2 mm (standard calibration range)

• Sensitivity: Approx. 8 mV/µm (system-dependent)

• Frequency range: DC to approximately 10 kHz (probe capability)

• Operating temperature: –35°C to +180°C

• Environmental sealing: IP67

• Housing material: Stainless steel with high-temperature resistant tip (PEEK or equivalent)

• Cable: Integrated coaxial cable, factory calibrated

CON041 Signal Converter

• Function: Probe excitation, signal demodulation, linearization, and scaling

• Frequency bandwidth: Up to 20 kHz (–3 dB)

• Dynamic response: Rise time typically <15 µs

• Output signal: Analog voltage (commonly –4 to –20 V or configurable depending on system)

• Supply voltage: Typically –24 V DC range (–23 V to –32 V)

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

• Mounting method: DIN rail installation

• Protection class: IP20 (enclosure)

• Certifications: CE, ATEX, IECEx, CSA (depending on version and approval level)

Performance Characteristics

• High-resolution measurement of shaft movement without physical contact

• Wide bandwidth suitable for high-speed rotating equipment

• Stable output signal after internal linearization

• Strong resistance to contamination such as oil and dust

• Designed for continuous operation in industrial environments

Application Areas

The PR6423/002-031 + CON041 system is widely applied in:

• Steam and gas turbine monitoring systems

• Industrial compressors and gearboxes

• Electric motors and generators

• Hydro turbine units

• API 670 compliant machinery protection systems

Compatibility

The conditioned output from the CON041 allows straightforward integration with:

• Emerson MMS 6000 protection systems

• AMS 6500 monitoring platforms

• Distributed Control Systems (DCS) and PLC-based condition monitoring setups

FAQ

Q: Can this system be used for both vibration and position measurement?
A: Yes, it supports radial vibration, axial displacement, and relative shaft position measurement when properly configured.

Q: Is the probe interchangeable with other PR6423 models?
A: Mechanical compatibility exists within the series, but electrical calibration differs. Matching with the correct converter (CON041) is required for accurate results.

Q: What installation factors affect measurement accuracy?
A: Target material, probe gap setting, mounting rigidity, and cable routing all influence system performance and should follow manufacturer guidelines.