PR6423/000-111 | Eddy-Current Proximity Probe

Parameter Value
​Model EPRO PR6423/000-111
​Manufacturer Baker Hughes (formerly EPRO)
​Type Eddy-Current Proximity Probe
​Measuring Range 0-2 mm (0-80 mils)
​Sensitivity 8 V/mm ±3% (200 mV/mil)
​Linearity ≤±1% FS
​Output Signal -24V DC to -0.5V DC (0-2mm)
​Frequency Response 0-10 kHz (±3dB)
​Target Material AISI 4140 Steel (or equivalent)
​Operating Temp -40°C to +150°C (probe)
​Cable Length 5m standard (customizable)
​Connector MIL-C-5015 (IP66)
​Hazardous Certification ATEX/IECEx Ex ia IIC T6 Ga
​Compliance API 670 (5th Ed.)
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Description

Product Overview

The ​EPRO PR6423/000-111 is a high-precision ​eddy-current proximity probe system designed for critical machinery vibration and position monitoring in turbomachinery, compressors, and rotating equipment. Part of EPRO’s (now Baker Hughes) PR 6423 series, this sensor delivers non-contact measurement of shaft displacement, eccentricity, and runout with micrometric resolution. The ​PR6423/000-111 integrates a temperature-stabilized oscillator and demodulator circuit to maintain ±1% accuracy across industrial environments. Its industrial-grade cable and NEMA 4X/IP66-rated connector ensure reliable operation in harsh conditions common in power plants, refineries, and offshore platforms.

Technical Specifications

Parameter Value
​Model EPRO PR6423/000-111
​Manufacturer Baker Hughes (formerly EPRO)
​Type Eddy-Current Proximity Probe
​Measuring Range 0-2 mm (0-80 mils)
​Sensitivity 8 V/mm ±3% (200 mV/mil)
​Linearity ≤±1% FS
​Output Signal -24V DC to -0.5V DC (0-2mm)
​Frequency Response 0-10 kHz (±3dB)
​Target Material AISI 4140 Steel (or equivalent)
​Operating Temp -40°C to +150°C (probe)
​Cable Length 5m standard (customizable)
​Connector MIL-C-5015 (IP66)
​Hazardous Certification ATEX/IECEx Ex ia IIC T6 Ga
​Compliance API 670 (5th Ed.)

PR6423/003-030-CN

Key Features

Precision Measurement

  • Temperature compensation (-30°C to +120°C) maintains calibration
  • Integrated reverse polarity/short-circuit protection
  • Optimal phase response for phase-sensitive measurements

Robust Design

  • Inconel®-sheathed probe withstands corrosive/abrasive environments
  • Epoxy-filled connector resists moisture ingress
  • Armored cable with PUR jacket (oil/chemical resistant)

Diagnostics & Integration

  • Pre-calibrated for plug-and-play installation
  • Linearization data embedded in EPRO MMS software
  • Real-time gap voltage monitoring for sensor health

Applications

  • ​Turbine Monitoring: Shaft displacement in steam/gas turbines
  • ​Compressor Protection: Thrust position in centrifugal compressors
  • ​Critical Machinery:
    • Generator eccentricity detection
    • Pump bearing wear monitoring
    • Gearbox shaft runout measurement
  • ​Hazardous Areas: Offshore platform compressor trains (ATEX Zone 1)
  • ​Power Generation: Hydro turbine guide bearing clearance

Installation Notes

  1. ​Probe Mounting: 8mm diameter probe with M8x1 threaded housing
  2. ​Gap Setting: 1-1.5mm target distance for optimal linear range
  3. ​Calibration: Factory-calibrated to AISI 4140; recalibrate for alternate materials

Compatible Systems

Monitoring System Compatible Module
​EPRO MMS 6000 CON041 (Proximitor Input)
​Bently Nevada 3500 3300 XL 11mm Proximitor
​Siemens Sipart PS2 7ML5830-2AA

 

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