EPRO PR6423/000-121+CON041 Eddy Current Proximity Sensor System

Overview

The PR6423/000‑121 + CON041 system combines a high-precision 8 mm eddy current proximity sensor with a robust signal converter, offering reliable non-contact monitoring of shaft displacement, vibration, eccentricity, and rotational speed. Designed for industrial turbomachinery, this set meets API 670 machine protection standards and provides continuous operation under extreme conditions.

Applications

• Steam and gas turbines

• Centrifugal compressors

• Industrial pumps and fans

• Machine protection and condition monitoring in power generation, petrochemical, and heavy industry

System Integration

• The PR6423 sensor connects directly to the CON041 converter.

• CON041 outputs standardized ±10 V or 4–20 mA signals compatible with DCS, PLC, or dedicated monitoring systems (e.g., MMS 6000, AMS 3000).

• Provides scalable and configurable output for precise shaft condition analysis.

Design Features

• Stainless steel sensor with armored cable for high-temperature and vibration resistance

• Rugged converter housing with reliable signal conditioning

• Non-contact measurement eliminates mechanical wear for extended service life

• Supports both radial and axial displacement and vibration monitoring

Technical Specifications

PR6423/000‑121 Sensor

• Sensor Head Diameter: 8 mm

• Measuring Range: 0–2 mm (extendable to 3 mm)

• Sensitivity: 8 V/mm (≈203 mV/mil)

• Frequency Response: 0–10 kHz (–3 dB)

• Nominal Air Gap: ~1.0 mm

• Static Accuracy: ≤ ±1.5%

• Dynamic Accuracy: High, optimized for shaft vibration monitoring

• Target Material: Ferromagnetic steel (42CrMo4 standard)

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

• Short-Term Excursion: Up to 200 °C (<4 hours)

• Max Cable Temperature: 200 °C

• Pressure Resistance: 10,000 hPa (145 psi)

• Shock Resistance: 5 g @ 60 Hz

• Cable Length Options: 5–10 m depending on variant

• Output Signal: Raw sensor signal

• Certification: ATEX approved

CON041 Converter

• Input: Compatible with PR6423 sensor signals

• Output Signal: Standardized ±10 V or 4–20 mA

• Configurable Output Scaling: Yes, adjustable for system integration

• Frequency Response: Matches sensor bandwidth (up to 10 kHz)

• Operating Temperature: –35 °C to +85 °C

• Certification: CE, API 670 compliant

Key Features

• Complete sensor-to-converter measurement chain

• Extended measurement range with 8 mm sensor head

• Accurate static and dynamic shaft monitoring

• Industrial-grade durability for high-temperature, high-vibration environments

• Flexible integration with DCS, PLC, or machine monitoring systems

FAQ / Technical Notes

Q: Can this system measure axial and radial shaft movement simultaneously?
A: Yes, the PR6423/000‑121 sensor monitors both radial and axial displacement and vibration.

Q: Is the CON041 compatible with other PR6423 variants?
A: Yes, CON041 supports other PR6423 sensors, providing standardized outputs across the series.

Q: What is the maximum operating temperature for continuous use?
A: The sensor operates up to 180 °C continuously; short-term excursions up to 200 °C are supported.

Q: How is the output configured for monitoring systems?
A: The CON041 converts raw sensor signals to ±10 V or 4–20 mA, with configurable scaling to match your system requirements.