Epro PR9268/302-100 Electrodynamic Velocity Sensor

The Epro PR9268/302-100 is a robust and highly sensitive electrodynamic velocity sensor developed by Epro (a brand under Emerson). Engineered for the monitoring of vibration velocity in rotating machinery such as turbines, compressors, pumps, and motors, this sensor offers excellent performance in harsh industrial conditions. Its analog output and electromechanical design make it ideal for detecting mechanical faults like imbalance, misalignment, and bearing defects.

Designed for direct installation on machine surfaces, the PR9268/302-100 delivers dynamic measurement signals proportional to vibration velocity, following ISO 10816/20816 standards. The sensor is completely passive, requiring no external power supply, and is widely used in machinery protection and predictive maintenance systems in industries such as power generation, oil & gas, chemical processing, and heavy manufacturing.

Technical Specifications

Applications

The Epro PR9268/302-100 sensor is widely deployed in condition monitoring and machinery protection across a variety of industries:

• Power Generation – steam turbines, generators

• Oil & Gas – centrifugal compressors, gearboxes, pumps

• Petrochemical and Refining – reactor agitators, motors

• Pulp & Paper – calendar rolls, paper machines

• Steel and Metallurgy – rolling mills, furnace fans

• Cement and Mining – crushers, mills, rotary kilns

• HVAC and Utilities – large blowers, cooling fans

It is suitable for both offline measurement using portable data collectors and for online monitoring systems integrated into plant automation.

Product Advantages

• No Power Supply Needed:

  As a passive electrodynamic sensor, it operates without an external power source, simplifying installation and reducing cost.

• High Sensitivity and Accuracy:

  Precise velocity signal output ensures accurate diagnosis of mechanical faults.

• Rugged Industrial Design:

  Constructed in a stainless-steel housing, the sensor is built to withstand vibration, moisture, oil, and temperature fluctuations.

• Wide Frequency Response:

  Effective over a broad range of typical machine vibration frequencies, enabling reliable fault detection.

• Flexible Mounting Options:

  Offers compatibility with a variety of studs or magnetic bases, suitable for both permanent and temporary installations.

• Cost-Effective:

  Long lifespan and zero power consumption result in low total cost of ownership (TCO).

• ATEX Versions Available:

  For hazardous zone use, certified versions can be supplied upon request.

Frequently Asked Questions (FAQ)

1. What is the primary output of the PR9268/302-100 sensor?

   The sensor outputs an analog voltage signal directly proportional to vibration velocity (mm/s).

2. Does this sensor require external power to operate?

   No, it is a passive electrodynamic sensor and does not need a power supply.

3. What kind of faults can this sensor detect?

   It can detect unbalance, misalignment, mechanical looseness, and bearing defects.

4. Can this sensor be used in ATEX hazardous environments?

   Yes, ATEX-certified versions are available upon request for Zone 1 and Zone 2 installations.

5. Is it suitable for vertical mounting?

   The PR9268/302-100 is optimized for horizontal mounting. For vertical applications, a different variant may be recommended.

6. What signal conditioning is needed?

   A standard vibration monitor or data acquisition system that accepts voltage input can process the signal.

7. What is the typical output sensitivity?

   It provides 28.5 mV/mm/s ±5%, which is industry standard for velocity vibration sensors.

8. How is it installed on equipment?

   It can be mounted using an M8/M10 stud or a magnetic adapter base for portable use.

9. What is the maximum cable length supported?

   Cable lengths of 10 meters or more can be used, though signal integrity should be confirmed over long distances.

10. Can this sensor be used in permanent installations?

    Yes, it is commonly used in both permanent and portable condition monitoring applications.