Emerson EPRO PR6423/010-110-CN 8mm Eddy Current Proximity Sensor

Emerson EPRO PR6423/010-110-CN 8mm Eddy Current Proximity Sensor

The Emerson EPRO PR6423/010-110-CN is a precision-engineered 8mm eddy current proximity sensor designed for non-contact displacement measurement in critical rotating machinery applications. This industrial-grade sensor delivers exceptional accuracy and reliability for turbomachinery vibration monitoring, shaft position tracking, and dynamic displacement analysis in harsh operating environments.

Advanced Sensor Technology for Critical Applications

Built on proven eddy current measurement principles, the PR6423/010-110-CN generates a high-frequency electromagnetic field that interacts with conductive targets to produce displacement-proportional output signals. The 8mm sensing tip diameter provides optimal balance between spatial resolution and measurement range, making it ideal for shaft diameters from 25mm upward in steam turbines, gas turbines, centrifugal compressors, and high-speed rotating equipment.

Technical Specifications & Performance Characteristics

Measurement Performance

The PR6423/010-110-CN sensor delivers industry-leading measurement accuracy with a 2mm (80 mils) linear measurement range and ±0.025mm (±1 mil) deviation from best-fit straight line. The recommended initial air gap of 0.5mm (20 mils) positions the sensor in the optimal linearity zone, ensuring accurate static position and dynamic vibration measurements across the full operating temperature range.

• Linear Measurement Range: 2.0 mm (80 mils) with exceptional linearity
• Recommended Initial Gap: 0.5 mm (20 mils) for optimal performance
• Incremental Scale Factor (ISF): 8 V/mm (203.2 mV/mil) ±5% @ 0-45°C
• Linearity (DSL): ±0.025 mm (±1 mil) deviation from best-fit straight line
• Temperature Coefficient: ±5% over 0-45°C (32-113°F) operating range
• Minimum Target Diameter: 25 mm (0.79 inches) for ferromagnetic steel

Environmental Ruggedness & Protection

Engineered for the most demanding industrial environments, this 8mm eddy current sensor features IP66 ingress protection rating, safeguarding internal electronics against dust infiltration and high-pressure water jets. The sensor operates reliably from -35°C to +180°C (-31°F to +356°F) with 1-meter integral cable, while the cable and connector assembly withstands temperatures up to +150°C (+302°F).

• Protection Rating: IP66 per IEC 60529 (dust-tight, water jet resistant)
• Sensor Operating Temperature: -35°C to +180°C (-31°F to +356°F) with 1m cable
• Cable & Connector Temperature: -35°C to +150°C (-31°F to +302°F)
• Humidity Resistance: Suitable for high-humidity environments (non-condensing)
• Vibration Resistance: Designed for high-vibration machinery installations

Construction Materials & Design

Premium materials ensure long-term reliability in corrosive and high-temperature environments. The sensor tip utilizes PEEK (Polyether Ether Ketone), a high-performance thermoplastic with exceptional chemical resistance and thermal stability to +180°C. The stainless steel housing provides corrosion resistance in steam, chemical process, and marine environments, while PTFE cable insulation maintains signal integrity in elevated temperature zones.

• Sensing Tip Material: PEEK (Polyether Ether Ketone) - high-temperature polymer
• Housing Material: Stainless steel for corrosion resistance
• Cable Insulation: PTFE (Polytetrafluoroethylene) rated to +150°C
• Connector: Brass, nickel-plated with Lemo self-locking design
• Thread Type: 3/8-24 UNF (Model /010 designation)
• Weight: Approximately 100 grams (3.53 oz) with 1m cable

Model Configuration & Ordering Information

Understanding the PR6423/010-110-CN Model Code

The model number PR6423/010-110-CN encodes specific configuration details:

• PR6423: 8mm eddy current sensor family
• /010: 3/8-24 UNF thread, no armored cable (base model)
• -110: Configuration code for case thread length and cable specifications
• -CN: Connector type and cable termination style

Threading Options & Mounting Compatibility

This sensor features 3/8-24 UNF threading (Unified National Fine), the standard thread specification for North American turbomachinery installations. The UNF thread provides superior vibration resistance compared to coarse threads, ensuring the sensor remains securely mounted during high-vibration operation. For metric installations, consider the PR6423/00x series with M10x1 threading.

Application Solutions & Use Cases

Steam & Gas Turbine Vibration Monitoring

Deploy the PR6423/010-110-CN for continuous shaft vibration monitoring on steam turbines and gas turbines in power generation facilities. Install sensors in X-Y pairs at each bearing location to measure radial shaft displacement, enabling early detection of unbalance, misalignment, bearing wear, and rotor rubs before catastrophic failure occurs. The 2mm measurement range accommodates normal bearing clearances while providing adequate margin for alarm setpoints.

Centrifugal Compressor Protection

In oil & gas, petrochemical, and air separation applications, protect high-value centrifugal compressors with multi-channel vibration monitoring systems using PR6423 sensors. Monitor both radial vibration and axial position to detect surge conditions, aerodynamic instabilities, and thrust bearing degradation. The sensor's high-temperature capability enables installation near hot gas sections without additional cooling provisions.

Shaft Position & Differential Expansion Measurement

Measure absolute shaft position to track thermal growth during turbine startup and load changes. Install axial position sensors to monitor thrust bearing condition and prevent rotor-to-stator contact. The DC-coupled measurement capability and high linearity enable precise tracking of slow thermal expansion movements as well as dynamic vibration components.

Generator Rotor Monitoring

Monitor generator rotor eccentricity and air gap variations in large synchronous generators. The 8mm sensor size fits standard generator monitoring installations, while the 2mm range accommodates typical rotor runout and vibration amplitudes. Pair with appropriate signal conditioning modules to interface with DCS, PLC, or dedicated vibration monitoring systems.

Installation Guidelines & Best Practices

Sensor Mounting Procedure

Install the PR6423/010-110-CN sensor perpendicular to the target shaft surface using the 3/8-24 UNF threads. Thread the sensor into a rigid mounting bracket or machinery casing, ensuring the mounting structure does not flex under vibration. Set the initial air gap to 0.5mm (20 mils) using precision feeler gauges or gap-setting tools. Lock the sensor position with a jam nut to prevent movement during operation.

Target Surface Requirements

For specified performance, use ferromagnetic steel targets conforming to 42CrMo4 (DIN) or AISI 4140 (SAE) specifications. The target surface should be smooth, clean, and free from coatings, rust, or contamination. Minimum shaft diameter is 25mm (0.79 inches) to avoid edge effects that degrade linearity. For non-standard target materials (stainless steel, aluminum, titanium), contact the factory for custom calibration data.

Cable Routing & EMI Protection

Route the sensor cable away from high-voltage power cables, variable frequency drives, and other EMI sources. Use metal conduit or cable tray for additional shielding in electrically noisy environments. Avoid sharp bends that could damage the PTFE insulation. Maintain minimum bend radius of 10x cable diameter. Secure the cable at regular intervals to prevent vibration-induced fatigue.

Signal Conditioning & System Integration

The PR6423/010-110-CN requires a compatible eddy current signal converter such as the Emerson EPRO CON021 or equivalent proximitor module. The converter provides sensor excitation, signal conditioning, and output scaling to industry-standard -2V to -18V or -4V to -20V ranges. Verify converter compatibility with PR6423 sensors before system commissioning.

Compatibility & System Architecture

Signal Converter Compatibility

This sensor is fully compatible with the following Emerson EPRO signal converters:

• CON021: Standard range converter for PR6422/23/24/26 sensors
• CON021/91x-xxx: Extended range converter (not required for PR6423)
• Legacy Proximitor Systems: Compatible with older Bently Nevada proximitor modules

Monitoring System Integration

The conditioned sensor output interfaces directly with:

• Emerson AMS 6500 Machinery Health Monitor
• Bently Nevada 3500 and ADAPT monitoring systems
• Rockwell Automation and Siemens PLC analog input modules
• DCS systems (Emerson DeltaV, Honeywell Experion, Yokogawa Centum)
• Portable vibration analyzers and data acquisition systems

Quality Standards & Compliance

• IEC 60529: IP66 environmental protection certification
• API 670: Compliant for machinery protection system applications
• ISO 20816: Suitable for vibration severity assessment per ISO standards
• CE Marking: European conformity for industrial machinery applications
• Factory Calibration: Each sensor ships with calibration data and certificates

Why Choose Industrial Control Hub?

As a trusted supplier of Emerson EPRO vibration monitoring solutions, Industrial Control Hub delivers genuine factory-certified sensors with comprehensive technical support. Our engineering team provides application assistance, system design consultation, and post-installation troubleshooting to ensure optimal performance in your critical machinery protection applications.

• ✓ Genuine Emerson EPRO factory-sealed products with full traceability
• ✓ Express global shipping with protective packaging
• ✓ Technical application engineering support and system design assistance
• ✓ Long-term spare parts availability for legacy systems
• ✓ Competitive pricing for single units and volume projects
• ✓ Calibration certificates and technical documentation included

Related Products & System Components

Build a complete vibration monitoring solution with these compatible products:

• Emerson EPRO CON021+PR6424/000-030 - Complete sensor and converter system
• Emerson EPRO PR6424/000-130 - 12mm proximity probe for extended range applications
• Emerson EPRO PR6426/010-140 - 32mm sensor for large shaft diameter applications

Technical Support & Engineering Assistance

Our application engineers are available to assist with sensor selection, mounting design, system configuration, and troubleshooting for your Emerson EPRO PR6423/010-110-CN eddy current sensor installation. Contact us for detailed technical datasheets, CAD models, calibration data, and project-specific quotations.

Quick Reference: Model PR6423/010-110-CN | 8mm Eddy Current Sensor | 2mm Linear Range | 3/8-24 UNF Thread | 8V/mm Scale Factor | IP66 Protection | -35°C to +180°C | PEEK Tip | Stainless Steel Housing | Lemo Connector | Factory Calibrated

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