The Epro PR9268/301-000 is a high-reliability electrodynamic velocity sensor, specifically engineered for the precise measurement of absolute bearing housing vibration on rotating machinery. This model, developed by Epro, now part of Emerson, is known for its rugged design and stable signal output even under harsh environmental conditions.

Unlike standard velocity sensors, the PR9268/301-000 version is equipped with an integrated shielded cable, offering enhanced installation flexibility and superior signal protection from electromagnetic interference (EMI). Its passive operation—requiring no external power—makes it ideal for direct connection to industrial vibration monitoring and protection systems, including legacy and modern MMS (Machine Monitoring Systems) platforms.

This sensor is widely used in critical process industries such as power generation, petrochemical, steel, cement, and offshore platforms, where early detection of mechanical wear and imbalance is essential for maintaining operational reliability and safety.

Technical Specifications

Product Applications

The PR9268/301-000 is used extensively for predictive and protective vibration monitoring across a wide range of industrial environments. Key application scenarios include:

• Gas and Steam Turbines: Vibration analysis for detecting imbalance, looseness, and bearing degradation.

• Compressors and Blowers: Monitoring shaft and housing vibration to prevent failure due to rotor issues.

• Pumps (Centrifugal and Reciprocating): Continuous condition monitoring to avoid unplanned shutdowns.

• Industrial Motors and Generators: Maintenance planning based on bearing housing vibration trends.

• Cement Kilns and Crushers: Harsh duty machinery vibration diagnostics in dusty, high-vibration environments.

• Marine Engines and Offshore Platforms: Critical for monitoring propulsion systems and onboard mechanical assets.

Product Advantages

• Integrated Cable Design: Enhances signal integrity, reduces installation time, and eliminates connector-related failures.

• Self-Powered Sensor: Requires no external power supply, simplifying system design and reducing costs.

• Excellent Frequency Response: Captures a wide range of mechanical failure signatures.

• Durable in Harsh Environments: IP67 housing with stainless steel build ensures long-term operation in wet, dusty, or corrosive atmospheres.

• Standardized Output Signal: Compatible with industry-standard vibration monitors, transmitters, and data acquisition systems.

• High Mechanical Strength: Withstands high shock and vibration levels common in industrial machinery.

• EMI-Shielded Output: Cable shielding ensures signal clarity even in electrically noisy environments.

• Easy Installation: Direct-mount design with standard threading supports fast field deployment.

• Available in ATEX Versions: Safe for use in hazardous and explosive industrial zones.

• Field-Proven Design: Widely used in OEM and retrofit applications globally with strong reliability records.

Frequently Asked Questions (FAQ)

1. What is the primary purpose of the PR9268/301-000?

   It is used for monitoring absolute vibration velocity in mm/s RMS on rotating machinery.

2. Does it need external power to function?

   No, it operates passively and generates its own signal through electrodynamic motion.

3. What’s the difference between this model and the PR9268/300-000?

   The PR9268/301-000 includes an integrated cable, providing improved noise immunity and faster installation.

4. Is it compatible with existing monitoring systems?

   Yes, it can be used with most vibration transmitters, data loggers, and machine protection systems.

5. Can this sensor be used outdoors or in wet conditions?

   Yes, it has an IP67-rated enclosure suitable for harsh environments.

6. Is the cable length customizable?

   Yes, factory customization is available for different cable lengths based on application needs.

7. What kind of vibration does it measure—relative or absolute?

   It measures absolute vibration of the machine housing or structure.

8. How often does this sensor require calibration?

   Generally, every 2–3 years, though this depends on site conditions and industry regulations.

9. Can this sensor be mounted horizontally?

   Yes, it supports both horizontal and vertical installation depending on the monitoring axis.

10. Are explosion-proof versions available?

    Yes, ATEX-certified versions are available upon request for use in hazardous zones.