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SKU: PR6424/002-130 CON021

Emerson Epro PR6424/002-130 CON021 Displacement Sensor

The Emerson PR6424/002-130 CON021 is a specialized 8mm non-contacting displacement sensor for industrial vibration monitoring. Built for extreme temperatures and high-pressure environments, it provides critical shaft position data for turbines, compressors, and pumps within a DCS framework.

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Technical Overview

The Emerson PR6424/002-130 CON021 is a high-performance eddy current transducer engineered for the non-contacting measurement of shaft vibration and displacement. This specific variation of the PR6424 series features a specialized 8mm sensor tip designed to deliver high linearity and sensitivity when monitoring critical rotating machinery. By generating a high-frequency electromagnetic field, the sensor detects minute changes in the gap between the probe tip and the target material, typically a rotating shaft, providing essential data for machine health diagnostics.

Functional Performance

The PR6424/002-130 operates on the eddy current principle, converting the physical distance into a proportional electrical signal. This model is specifically optimized for high-temperature and high-pressure environments, ensuring that the sensor remains accurate even under the thermal expansion conditions common in steam turbines and large compressors. The “CON021” designation indicates a specific connector and cable configuration designed to maintain signal integrity over distance, preventing electromagnetic interference from distorting the vibration readings.

Key Technical Characteristics

  • Manufacturer: Emerson (Epro Brand)
  • Model Designation: PR6424/002-130
  • Configuration Code: CON021
  • Measurement Range: Typically up to 2.0 mm or 4.0 mm (dependent on driver calibration)
  • Sensor Tip Diameter: 8 mm
  • Thread Type: Metric M10x1 (Standard for industrial mounting)
  • Operating Temperature Range: -35°C to +175°C
  • Pressure Resistance: Up to 6 bar at the sensor tip
  • Target Material: Ferromagnetic steel (standard calibration for 42CrMo4)

Primary Applications

  • Turbine Monitoring: Continuous tracking of radial shaft vibration and axial position in steam and gas turbines.
  • Compressor Protection: Detection of surge conditions or bearing wear in high-speed centrifugal compressors.
  • Industrial Pumps: Monitoring of shaft run-out and eccentricities in large-scale fluid transport systems.
  • Gearbox Analysis: Assessing the alignment and stability of high-load transmission shafts.

Operational Advantages

  • Early Fault Detection: Identifies mechanical imbalances and bearing degradation before they lead to unplanned outages.
  • Predictive Maintenance: Supports modern maintenance strategies by providing real-time data to Emerson’s AMS Asset Monitor or similar DCS platforms.
  • Environmental Durability: The stainless steel housing and technical plastic tip resist corrosion and oil contamination.
  • Scalable Integration: Designed for seamless connectivity with the PR6422, PR6423, and PR6425 series drivers and converters.
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Hardware Specifications

ParameterSpecification
ModelPR6423/000-131 CON041
BrandEmerson
Product RangeEPRO
Module TypeEddy Current Sensor
OriginUSA
Weight0.24 kg
Dimensions2 x 15 x 15 cm
Operating Temp-35 to 180 deg C
Power ConsumptionPassive sensor coil (driven by transmitter)
HS Code8537101190
StatusDiscontinued (Dec 31, 2018)

Process Control and DCS Characteristics

  • Generates high-frequency electromagnetic fields to detect micrometer-scale gap variations against target metallic shaft surfaces.
  • Transmits raw high-frequency signal outputs to signal converters or 4-20 mA HART loop protocol transmitters for system logging.
  • Provides high linearity and channel-to-channel isolation across multi-channel turbomachinery monitoring racks.
  • Accepts integration with field junction boxes, utilizing cold junction compensation routines where ambient temperature shifts affect signal conditioning hardware.

Frequently Asked Questions

Q: What signal conditioning unit is required to drive the PR6423/000-131 probe?A: The sensor coil requires a matching CON041 transmitter or signal converter to supply the excitation frequency and process raw impedance changes into normalized voltage signals.Q: How does cable length affect calibration on this eddy current sensor?A: System calibration depends on the total electrical length of the probe and extension cable assembly; cable substitutions alter system tuning and impedance scaling.

Field Installation Guidelines

  • Verify mechanical target clearance to prevent physical impact between the probe tip and rotating shaft during machine startup.
  • Route sensor lead cables through grounded metallic conduit to suppress ambient electromagnetic interference.
  • Maintain a minimum cable bending radius of 30 mm to avoid damaging internal coaxial conductors.
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The Emerson PR6423/010-130 CON021, also cataloged as the PR6423/010-130 Velocity Sensor, operates as a dedicated hardware component for dynamic shaft vibration acquisition and position monitoring within EPRO machine monitoring systems.

Hardware Specifications

ParameterSpecification
ModelPR6423/010-130 CON021
BrandEmerson
Product RangeEPRO
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Dimensions21 x 21 x 4 cm
Operating Temp-35 to 180 deg C
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Process Control and DCS Characteristics

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  • Interfaces with 4-20 mA HART loop protocol transmitters and DCS analog input cards for real-time monitoring.
  • Ensures precise signal transfer using channel-to-channel isolation across multi-channel turbomachinery monitoring racks.
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Frequently Asked Questions

Q: What function does the CON021 signal converter perform with the PR6423/010-130 probe?A: The CON021 signal conditioning unit provides the required high-frequency excitation current to the probe tip and converts raw impedance variations into calibrated voltage outputs.Q: How does mechanical clearance affect probe signal integrity?A: Unintended metal objects within the side clearance zone of the probe tip distort the electromagnetic field, requiring clear radial installation space around the target surface.

Field Installation Guidelines

  • Verify probe tip alignment and initial mechanical gap against the target face before applying system excitation power.
  • Route signal interconnect cables through dedicated grounded steel conduit to suppress high-voltage electromagnetic interference.
  • Maintain a minimum cable bending radius of 30 mm during field installation to avoid damaging internal conductor shielding.
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Hardware Specifications

ParameterSpecification
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Mechanical Monitoring & TSI Characteristics

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Frequently Asked Questions

Q: What is the primary requirement for gap voltage validation during sensor commissioning?A: You must ensure the probe tip distance from the target surface aligns with the factory-specified linear range, typically targeting a -10 VDC center-gap point to maintain measurement linearity.Q: How do you mitigate cross-talk in multi-probe setups?A: You must observe the manufacturer's recommended probe spacing and ensure proper electromagnetic shielding of the coaxial signal cabling to prevent interference between adjacent measurement channels.

Field Installation Guidelines

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  • Gap Calibration: You must perform a static gap measurement using a calibrated feeler gauge before system activation. You should adjust the probe axial position until the output voltage reaches the -10 VDC target, confirming the sensor operates at the center of its linear range.
  • Cable Routing: You must route the coaxial signal cable through dedicated, grounded conduits separate from high-current power lines. You must secure all cable runs to minimize mechanical vibration-induced fatigue at the connector interfaces.
  • Shielding and Grounding: You must ensure the cable shield terminates at a single, clean instrumentation ground point. You should verify continuity across all junctions to minimize the risk of ground loop currents affecting the low-level transducer signal.
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Product Overview

The Emerson Epro PR6424/000-130 CON021 is a high-precision 16mm eddy current sensor designed for non-contacting measurement of shaft vibration and displacement. Part of the specialized Epro product line, this current module serves as the primary transducer for monitoring critical rotating equipment. It operates on the eddy current principle, where high-frequency electromagnetic fields detect the distance between the sensor tip and the metallic target (such as a turbine shaft) without physical contact.This system is vital for asset protection, providing the high-speed data necessary for detecting shaft eccentricity, axial position, and radial vibration. By converting mechanical movement into precise electrical signals, it enables the Distributed Control System (DCS) to perform real-time health analysis of high-value industrial machinery.

Technical Specifications

  • Manufacturer: Emerson (Epro Product Line)
  • Model Number: PR6424/000-130
  • Part Reference: CON021
  • Module Type: Current Module / Eddy Current Sensor
  • Tip Diameter: 16 mm
  • Cable Configuration: CON021 specific connector/cable assembly
  • Measurement Type: Non-contacting vibration, displacement, and speed
  • Weight: 0.34 kg
  • Dimensions: 16 cm x 14.5 cm x 4 cm
  • Origin: USA
  • System Compatibility: Emerson DeltaV, Ovation, and other DCS/PLC systems
  • HS Code: 8537101190

Key Characteristics and Functionality

The PR6424/000-130 is engineered for extreme reliability in environments where traditional sensors would fail. Its technical advantages include:
  • Exceptional Sensitivity: Capable of detecting sub-micron changes in displacement, ensuring the earliest possible detection of shaft instability.
  • Harsh Environment Resilience: Built to withstand high pressure, extreme temperature fluctuations, and exposure to industrial lubricants and oils.
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  • Real-Time Data Streaming: Facilitates continuous monitoring, allowing for predictive maintenance schedules that prevent catastrophic equipment failure.
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Industrial Applications

The Emerson PR6424/000-130 is a standard choice for vibration monitoring in high-stakes industries:
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