Emerson PR6423/13R-030 Eddy Current Sensor System

Product Overview

The EPRO PR6423/13R-030 is a high-precision, non-contact eddy current measurement system engineered for the continuous monitoring of critical rotating machinery. Designed to comply with API 670 standards, this system provides essential data for radial vibration, axial displacement, shaft eccentricity, and rotational speed.

The "R" variant is specifically optimized for installations in restricted spaces or where unique mounting angles are required. Paired with the CON021 converter, the system ensures high-fidelity signal transmission for predictive maintenance in turbines, compressors, and high-speed pumps.

Technical Specifications

PR6423/13R-030 Sensor (8 mm Probe)

• Linear Measurement Range: 2 mm (80 mils)

• Incremental Scale Factor (ISF): 8 V/mm (203.2 mV/mil) $\pm$5%

• Linearity (DSL): $\pm$0.025 mm ($\pm$1 mil)

• Initial Air Gap: 3.0 mm (118 mils)

• Target Material: Conductive ferromagnetic steel (42CrMo4 / AISI 4140)

• Operating Temperature: -40°C to +150°C

• Protection Class: IP66 (IEC 60529)

• Minimum Shaft Diameter: 25 mm (0.79 in)

CON021 Converter Module

• Frequency Range: 0–20 kHz

• Supply Voltage: -23 to -32 V DC

• Output Range: -4 to -20 V

• Rise Time: <15 $\mu$s

• Operating Temperature: -30°C to +100°C

• Protection Class: IP20

Core Engineering Features

• Restricted Space Optimization: The "R" configuration allows for reliable vibration and displacement sensing in tight machine housings where standard probes cannot be easily positioned.

• Non-Contact Eddy Current Technology: Utilizes electromagnetic fields to measure distance without physical contact, eliminating wear and ensuring long-term measurement stability.

• Predictive Maintenance Asset: Directly supports machine protection systems by detecting early signs of bearing wear, shaft misalignment, or rotor imbalance.

• High Thermal Stability: The probe is rated up to +150°C, making it suitable for mounting near steam turbine bearings or high-temperature compressor stages.

• Precision Linearity: Maintains a deviation (DSL) of only $\pm$0.025 mm over the full 2 mm range, providing the accuracy required for safety-critical axial thrust monitoring.