The Epro PR6424/103-121 16 mm Eddy Current Sensor is a high-precision, non-contact displacement probe engineered for continuous monitoring of shaft vibration, radial displacement, and rotor position in critical rotating equipment. Using advanced eddy-current technology, it provides micron-level accuracy, rapid dynamic response, and exceptional linearity across its full measuring range.

This sensor belongs to Epro’s established PR6424 series, which is designed for heavy-duty applications in power generation, petrochemical, and industrial machinery. Its rugged stainless-steel construction, wide operating temperature range, and strong immunity to electromagnetic interference make it a dependable choice for predictive maintenance and machine protection systems operating in harsh industrial environments.

Product Specifications

Applications

• Turbomachinery Monitoring: Gas and steam turbines in power plants.

• Compressors and Pumps: Detects early signs of imbalance or bearing wear.

• Large Motors & Generators: Tracks rotor position and radial displacement.

• Gearboxes: Measures dynamic shaft motion to prevent catastrophic failures.

• Predictive Maintenance Systems: Integrates with condition-monitoring platforms such as Epro MMS or Bently Nevada.

• Industrial Fans and Blowers: Continuous vibration tracking for safety and efficiency.

Advantages

• High Precision: Micron-level measurement with excellent linearity.

• Wide Temperature Capability: Reliable operation from –35 °C to +180 °C.

• Rugged Construction: Stainless-steel housing and mineral-insulated cable for harsh environments.

• Strong EMI Immunity: Stable performance in electrically noisy facilities.

• Flexible Integration: Fully compatible with Epro CON021 and other standard proximity drivers.

• Fast Dynamic Response: Up to 10 kHz frequency response captures rapid vibration changes.

• Low Maintenance: Factory calibration reduces on-site adjustments.

• Hazardous Area Certifications: ATEX and IECEx approved for explosive atmospheres.

FAQ

1. What is the nominal sensitivity of the PR6424/103-121?

   8 mV/µm under standard calibration conditions.

2. Which driver module is recommended for signal conditioning?

   The Epro CON021 driver is the standard interface.

3. Can the sensor operate in high electromagnetic interference areas?

   Yes, its eddy-current design provides strong EMI immunity.

4. What is the recommended operating gap between the probe and the shaft?

   Typically 1.0 – 2.0 mm for optimal accuracy and linearity.

5. Does the probe require a direct power supply?

   Power is supplied through the driver module at –24 V DC.

6. What is the frequency response capability?

   DC to 10 kHz (–3 dB), enabling detection of rapid vibration events.

7. Is the probe tip field-replaceable?

   No, it is factory-sealed to maintain calibration integrity.

8. Can the sensor cable length be customized?

   Yes, mineral-insulated cables can be ordered in custom lengths.

9. Which target materials provide the best measurement accuracy?

   Ferromagnetic metals such as steel or iron are recommended.

10. Is the PR6424/103-121 compatible with third-party monitoring systems?

    Yes, as long as the system supports standard eddy-current probe signals.