Epro PR9268/303-000 Electrodynamic Velocity Sensor

The Epro PR9268/303-000 is an industrial-grade electrodynamic velocity sensor developed for accurate and reliable measurement of mechanical vibration in rotating machinery. Designed and manufactured by Epro, a trusted Emerson brand, the PR9268/303-000 is part of the proven PR9268 series, widely used in machinery protection and condition monitoring systems.

The sensor converts mechanical vibrations into electrical signals using a robust coil-magnet assembly. This passive operating principle ensures no external power supply is required, making it especially well-suited for rugged industrial environments with harsh conditions such as high temperatures, vibrations, and contamination.

Engineered for horizontal mounting, the PR9268/303-000 is optimized for long-term reliability and ease of integration into existing plant monitoring infrastructure.

Technical Specifications

Applications

The PR9268/303-000 is designed for a wide range of vibration monitoring applications, especially in critical rotating equipment where early fault detection can prevent costly breakdowns:

• Steam and Gas Turbines

• Centrifugal and Reciprocating Compressors

• Industrial Fans and Blowers

• Pumps and Motors in Oil & Gas Facilities

• Gearboxes in Manufacturing Lines

• Paper Machines and Calendar Rolls

• Steel Mill Equipment

• Mining and Cement Plant Machinery

It is commonly used in both portable diagnostic systems and permanently installed online monitoring systems, integrated with vibration monitors, DCS, and condition-based maintenance platforms.

Product Advantages

• Passive Design – No Power Required:

  Generates its signal through internal motion, eliminating the need for external power and simplifying integration.

• High Mechanical Robustness:

  Stainless steel construction and IP-rated sealing ensure resistance to industrial contaminants, temperature changes, and mechanical shocks.

• Excellent Signal Consistency:

  Delivers stable and accurate readings over years of continuous use, even in vibrating environments.

• Industry-Standard Sensitivity:

  With 28.5 mV/mm/s output, it is fully compatible with most vibration monitors and analyzers.

• Flexible Mounting:

  Supports various thread sizes and accessories such as magnetic bases for temporary or permanent mounting.

• Low Cost of Ownership:

  Durable design minimizes replacement cycles, while passive operation reduces energy and maintenance costs.

• Global Compliance:

  CE and RoHS certified; optional ATEX certification makes it suitable for hazardous area use in petrochemical plants and refineries.

Frequently Asked Questions (FAQ)

1. What is the function of the PR9268/303-000 sensor?

   It measures the vibration velocity of rotating machinery to detect mechanical faults.

2. Is the PR9268/303-000 suitable for permanent installation?

   Yes, it is designed for long-term operation in both permanent and temporary installations.

3. Does the sensor require an external power supply?

   No, it is a self-generating sensor and does not require external power.

4. Can this sensor be used in hazardous zones?

   Yes, ATEX-certified variants are available for use in hazardous areas.

5. What monitoring equipment is compatible with this sensor?

   Any monitoring device that accepts AC voltage input for vibration velocity is compatible.

6. Is the sensor weatherproof?

   Yes, its IP65/IP67 rating ensures protection against dust and water ingress.

7. Can it be used in vertical mounting?

   No, this specific model is optimized for horizontal mounting. Use a vertical model for vertical surfaces.

8. What is the lifespan of the sensor under normal conditions?

   Typically over 10 years in standard industrial environments.

9. How is it connected to a monitoring system?

   Via a MIL-style connector or a permanently attached cable, depending on the variant.

10. Is it compatible with Emerson or other third-party monitoring systems?

    Yes, it is fully compatible with Emerson systems and most third-party monitoring solutions.