EPRO PR6423/010-010-CN Eddy Current Sensor

The EPRO PR6423/010-010-CN is a high-performance eddy current displacement sensor designed for non-contact measurement of static and dynamic positions, particularly for monitoring shaft vibration, axial position, and eccentricity in rotating machinery. This sensor is part of EPRO's CONTREC series, widely used in turbomachinery protection systems. The model number indicates an 8 mm diameter probe (PR6423), with a specific cable length and connector configuration (010-010 likely denotes 1.0 m cable, while CN indicates a certain connector type). It operates on the eddy current principle, generating a low-power RF field that interacts with the target surface, producing a voltage output proportional to the gap.

Key Features

• Non-Contact Measurement: No mechanical contact with the rotating shaft, ensuring long life and no wear.

• High Linearity: Excellent linearity over the measurement range, typically within ±1% of full scale.

• Temperature Stability: Low thermal drift ensures accurate measurements across varying operating temperatures.

• Rugged Construction: Stainless steel housing and sealed tip resist oil, water, and dust, suitable for harsh environments.

• Interchangeable: Designed for use with EPRO signal conditioners (e.g., CON021, SDM) for seamless system integration.

• Metric Thread: Standard M8x1 thread for easy installation in industry-standard mounting brackets.

Technical Specifications

• Probe Diameter: 8 mm

• Measurement Range: 2 mm (typical, linear range)

• Sensitivity: 8 V/mm (nominal, with standard target material)

• Frequency Response: 0 to 10 kHz (depending on signal conditioner)

• Target Material: Ferromagnetic or non-ferromagnetic conductive materials (calibration required)

• Cable Length: 1.0 m (as indicated by /010-010)

• Connector: Coaxial (e.g., BNC, MS-type) depending on CN designation

• Operating Temperature: -30°C to +120°C (probe tip)

• Protection Class: IP68 (probe body)

• Certifications: ATEX / IECEx optional for hazardous areas

Applications

The PR6423/010-010-CN is primarily used in critical rotating machinery such as steam turbines, gas turbines, compressors, pumps, and fans. It monitors radial vibration, axial displacement (thrust position), and shaft eccentricity, providing essential data for condition monitoring and machine protection systems (API 670 compliant). It is also used in paper mills, steel plants, and power generation facilities.

Integration and Calibration

The sensor is typically connected to an EPRO signal conditioner (e.g., CON021 or MMS6000 series) that provides power, demodulation, and output scaling. Calibration is performed using the target material specified for the application (usually 4140 steel). The /010-010-CN variant is pre-calibrated for a specific cable length; extension cables must be of the same type to maintain accuracy.

Reliability and Environmental Compliance

Built to withstand the rigors of continuous industrial operation, the PR6423 probe meets stringent standards for vibration, shock, and temperature. Its IP68 rating allows submersion in liquids. The sensor is CE marked and available with hazardous area certifications (ATEX, IECEx) for use in explosive environments.

With its proven accuracy and durability, the EPRO PR6423/010-010-CN eddy current sensor is a trusted choice for protecting high-value rotating machinery worldwide.