EPRO PR6424/004-010 + CON021

EPRO PR6424/004-010 + CON021

Product Overview
The EPRO PR6424/004-010 + CON021 is a non-contact eddy current sensor system used for precise measurement of shaft position, vibration, and displacement. The PR6424/004-010 probe defines the mechanical interface, cable length, and calibration characteristics, while the CON021 transducer provides signal conditioning and analog output. This combination is suitable for critical rotating machinery monitoring where stable long-term measurement is required.

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Description

EPRO PR6424/004-010 + CON021

Technical Specifications

  • Brand: EPRO, part of Emerson
  • Sensor Model: PR6424/004-010
  • Transducer Model: CON021
  • Sensor Type: Non-contact eddy current proximity sensor
  • Probe Series: PR6424
  • Typical Linear Range: ±2.0 mm for PR6424 with standard CON021
  • Extended Range: Available with CON021/91 variants depending on application
  • Frequency Response: 0 Hz to approximately 10 kHz to 20 kHz
  • Rise Time: Less than 15 µs
  • Supply Voltage: Typically -24 V DC for CON021
  • Output Signal: DC voltage with superimposed AC vibration signal
  • Linear Output Range: Typically -4 V to -20 V with -24 V supply
  • Output Impedance: Approximately 100 kΩ
  • CON021 Protection Rating: IP20
  • Probe Protection Rating: Depends on cable termination and installation
  • Calibration Material: Typically 42CrMo4 / AISI 4140 steel unless otherwise specified

Functional Features

  • Provides stable non-contact displacement measurement.
  • Delivers both static position and dynamic vibration signals.
  • Factory-calibrated as a complete measurement chain.
  • High resistance to oil, moisture, dust, and electromagnetic interference.
  • Suitable for continuous monitoring in harsh industrial environments.
  • Compatible with EPRO MMS 3000 and MMS 6000 monitoring platforms.
  • Supports radial vibration, axial displacement, eccentricity, and position monitoring.

Application Scenarios

  • Turbine shaft vibration and displacement monitoring
  • Compressor rotor position protection
  • Large motor and generator shaft monitoring
  • Pump and fan bearing vibration measurement
  • Industrial gearbox condition monitoring
  • Rotating equipment startup and shutdown analysis
  • Machinery protection and predictive maintenance systems

Performance Parameters

  • Linear range for PR6424 with standard is typically ±2.0 mm.
  • Linearity error for PR6424 with CON0X1 is typically ≤1.5 percent of full scale.
  • Linearity error with extended-range CON0X1/91 variants depends on selected range and is typically within 1.0 to 2.0 percent.
  • Zero-point temperature drift is approximately 200 mV per 100 K.
  • Sensitivity temperature drift is typically less than 2 percent per 100 K.
  • Time drift is typically no more than 0.3 percent.
  • Supply voltage influence is typically less than 0.2 percent per volt.

Material Composition

  • Probe body typically made of stainless steel
  • Probe tip typically uses PEEK or similar high-temperature insulating material
  • Cable insulation typically uses PTFE
  • Connector typically uses LEMO-type metal connector
  • enclosure uses industrial-grade plastic or metal housing
  • Internal circuitry includes oscillator, demodulator, and output driver stages

Structural Features

  • Threaded probe body for secure mechanical mounting
  • Integrated or detachable cable depending on variant
  • LEMO connector or screw terminal cable end
  • transducer with panel or DIN-rail mounting capability
  • Screw terminals for power supply and analog output
  • LEMO input connector for probe signal

Working Principle
The transducer generates a high-frequency alternating current that flows through the probe coil. When the probe tip faces a conductive metal target, eddy currents are induced in the target surface. These eddy currents change the effective impedance of the probe coil in proportion to the gap distance. The transducer detects this change and produces a linear DC output voltage. The output includes a steady DC level representing the average gap and an AC component representing vibration. The system remains linear within the calibrated measurement range.

Installation Requirements

  • Confirm the probe model, cable length, and calibration data before installation.
  • Install the probe in a rigid mounting bracket or threaded hole.
  • Adjust the air gap to the calibrated mid-range position.
  • Set the gap voltage to the value specified on the calibration certificate, typically around -10 V to -12 V.
  • Use only the cable length defined in the calibrated system configuration.
  • Route signal cables separately from power and motor cables.
  • Ground the cable shield at the transducer end only.
  • Mount the transducer in a clean, dry, and ventilated cabinet.
  • Confirm correct supply voltage and polarity before energizing.

Precautions for Use

  • Do not modify cable length or splice cables, as this will affect calibration.
  • Do not use standard in explosive atmospheres without approved intrinsically safe barriers.
  • Keep the probe face clean and free from metal debris, oil, or carbon deposits.
  • Avoid mounting near keyways, oil holes, or surface irregularities.
  • Verify gap voltage after final mechanical tightening.
  • Replace faulty components with correctly calibrated EPRO parts.
  • Perform periodic inspection of connectors, cables, and gap settings.
  • Refer to the official EPRO calibration certificate and product manual for the exact /004-010 + configuration.

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