Epro PR9268/300-000 Electrodynamic Velocity Sensor

The Epro PR9268/300-000 is a high-performance electrodynamic velocity sensor, purpose-built for vibration monitoring of rotating machinery. Manufactured by Epro, a part of the NVE Corporation (also known under Emerson Process Management in some sectors), this sensor is engineered for the continuous monitoring of absolute bearing housing vibrations, ensuring operational safety and predictive maintenance in critical assets such as turbines, compressors, pumps, and motors.

The PR9268/300-000 model operates on the electrodynamic principle and provides a direct analog voltage output proportional to the vibration velocity, making it ideal for integration into condition monitoring systems or machinery protection platforms like MMS (Machine Monitoring Systems). Known for its robust mechanical design, long service life, and excellent signal fidelity, this sensor is suited for harsh industrial environments, including high-vibration zones and high temperatures.

Technical Specifications

Product Applications

The Epro PR9268/300-000 velocity sensor is widely adopted across industries that rely heavily on the smooth and safe operation of rotating machinery. Its primary application areas include:

• Petrochemical Plants: For continuous bearing vibration monitoring of compressors and pumps.

• Power Generation: Monitoring of steam and gas turbines, generators, and auxiliary rotating equipment.

• Steel and Paper Mills: For motors, rolls, and fans subjected to harsh vibration conditions.

• Cement and Mining Industries: Detects early failures in crushers, conveyors, and rotary kilns.

• Marine and Offshore Platforms: Engine room and propulsion system condition monitoring.

• OEM Machinery: As part of packaged machinery diagnostic systems in manufacturing plants.

Product Advantages

• High Sensitivity and Precision: Provides accurate readings even in low-vibration environments.

• Electrodynamic Design: No external power required; self-generating signal makes it simple to integrate.

• Rugged Construction: Stainless steel housing and shock-resistant design ensure long life in demanding environments.

• Excellent Frequency Response: Covers the critical vibration spectrum for typical machinery faults.

• Simple Mounting: Can be directly bolted to the bearing housing; compatible with various standard threads.

• Cost-Effective Condition Monitoring: Ideal for retrofitting into legacy systems and expanding existing protection capabilities.

• ATEX Certified Options: Suitable for use in hazardous and explosive atmospheres when required.

• Field-Proven Reliability: Trusted in thousands of installations worldwide for over two decades.

• Versatile Signal Compatibility: Works seamlessly with many vibration transmitters, monitors, and PLC inputs.

• Low Maintenance Requirements: Mechanical, non-powered design results in minimal servicing needs.

Frequently Asked Questions (FAQ)

1. What does the PR9268/300-000 measure?

   It measures absolute vibration velocity in mm/s RMS using an electrodynamic principle.

2. Does it require external power?

   No, it is a passive sensor and generates its own signal, which simplifies wiring and installation.

3. How should it be mounted?

   It should be mounted directly on the bearing housing using an M8 thread, preferably on a flat surface.

4. Can this sensor be used in explosive environments?

   Yes, ATEX-approved versions of the PR9268/300-000 are available for hazardous areas.

5. What is the signal output type?

   It provides a low-impedance analog voltage output proportional to vibration velocity.

6. Is the sensor direction-sensitive?

   Yes, it is primarily intended for axial or radial vibration measurement, depending on orientation.

7. What monitoring systems is it compatible with?

   It is compatible with Epro CON0xx series, MMS systems, and many other industrial vibration monitors.

8. What happens if it’s installed upside down?

   The signal may invert or degrade; always follow the manufacturer’s installation guidelines.

9. What cable or connector is recommended?

   A 2-pin MIL-C-5015 connector is standard; other options include integral shielded cables.

10. How often does it need to be calibrated?

    Typically, every 2 to 3 years depending on environmental conditions and regulatory standards.