EPRO PR6423/002-001-CN Eddy Current Probe

The EPRO PR6423/002-001-CN is a precision eddy current displacement sensor designed for non-contact measurement of shaft vibration, axial position, and eccentricity in rotating machinery. This model features an 8 mm diameter probe body with a short integral cable (0.2 m as indicated by /002-001), which is typically used with an extension cable to reach the signal conditioner. The sensor operates on the eddy current principle, generating a low-power radio frequency field that interacts with the conductive target, producing an output voltage proportional to the gap. It is widely used in API 670-compliant machinery protection systems.

Key Features

• Short Integral Cable: 0.2 m cable allows for easy routing and connection to extension cables in tight spaces.

• Non-Contact Measurement: No mechanical wear, suitable for high-speed rotating shafts.

• High Sensitivity: Typical sensitivity of 8 V/mm, providing high resolution for small displacement changes.

• Wide Temperature Range: Probe tip operates from -30°C to +120°C, suitable for most machinery environments.

• Rugged Construction: Stainless steel housing and sealed tip resist oil, water, and contaminants.

• Metric Thread: M8x1 thread for easy installation in standard probe holders.

Technical Specifications

• Probe Diameter: 8 mm

• Measurement Range: 2 mm (linear range)

• Sensitivity: 8 V/mm (±5%) with 4140 steel target

• Frequency Response: 0 to 10 kHz (limited by signal conditioner)

• Target Material: Any conductive material (calibration required for non-standard materials)

• Cable Length: 0.2 m (integral) with connector for extension cable

• Connector: Coaxial, typically MS-type or BNC (depending on CN designation)

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

• Protection Class: IP68 (probe body)

• Certifications: CE, ATEX / IECEx optional for hazardous areas

Applications

This probe is used in critical machinery such as steam turbines, gas turbines, centrifugal compressors, and pumps. It monitors radial vibration, axial thrust position, and shaft eccentricity. The short cable version is particularly useful in applications where space is limited or where the probe must be installed in a confined area, allowing the extension cable to be routed through conduit.

Integration and Calibration

The PR6423/002-001-CN is designed to work with EPRO signal conditioners (e.g., CON021, MMS6312) that provide the oscillator, demodulator, and power. The probe is typically connected via an extension cable (e.g., PR6426 series) to reach the conditioner. Calibration is performed with the specific target material and extension cable length to ensure system accuracy.

Reliability and Environmental Compliance

Built to withstand harsh industrial conditions, the probe meets rigorous standards for vibration, shock, and temperature. Its IP68 rating ensures protection against dust and temporary immersion. The sensor is CE marked and available with hazardous area certifications for use in explosive atmospheres.

With its precision and robustness, the EPRO PR6423/002-001-CN eddy current probe delivers reliable data for protecting and optimizing the performance of critical rotating machinery.