Epro PR9266/12 Electrodynamic Velocity Sensor

Product Introduction

The Epro PR9266/12 Electrodynamic Velocity Sensor is a high-precision vibration velocity transducer designed for monitoring and analyzing the mechanical vibration of industrial machinery. Operating on the moving-coil electrodynamic principle, the sensor converts mechanical vibration into a proportional electrical voltage signal, enabling direct and accurate measurement of vibration velocity without requiring signal integration.

Engineered for absolute vibration measurement on non-rotating surfaces such as bearing housings, gearboxes, turbines, and compressors, the PR9266-12 delivers reliable, linear output over a wide frequency range. It is part of Epro’s well-established PR926x series, which has become a benchmark in industrial vibration measurement for its mechanical durability, electrical precision, and long-term stability under harsh operating conditions.

This model is specifically optimized for integration with Epro MMS machine monitoring systems or similar condition monitoring setups, offering precise real-time feedback on machinery health. Its compact and rugged design, combined with high sensitivity and self-generating operation, makes it suitable for both permanent installations and portable measurement applications in industries such as power generation, petrochemical, steel, and marine sectors.

---

Technical Specifications

---

Product Applications

The Epro PR9266/12 is designed for a wide variety of industrial vibration monitoring and machine protection applications. Its ability to measure vibration velocity directly makes it particularly valuable for assessing the dynamic behavior of rotating machinery and structural components.

Main Application Areas Include:

• Turbines and Generators: Measurement of casing vibration for imbalance, misalignment, and bearing wear.

• Compressors: Continuous monitoring of vibration amplitude to detect mechanical looseness or resonance conditions.

• Pumps: Early detection of cavitation or impeller imbalance through vibration monitoring.

• Motors and Fans: Real-time tracking of vibration velocity for predictive maintenance programs.

• Gearboxes: Analysis of vibration velocity to identify gear mesh faults or bearing defects.

• Industrial Equipment Frames: Measurement of structure-borne vibration to monitor machine foundation stability.

The PR9266/12 ensures accurate detection of machine abnormalities before failures occur, supporting predictive maintenance and minimizing unplanned downtime.

---

Product Advantages

• Self-generating sensor: Operates without the need for an external power source or conditioning unit.

• True velocity output: Eliminates integration errors associated with acceleration-based sensors.

• Wide dynamic range: Delivers accurate readings across low to high vibration levels.

• Exceptional reliability: Withstands extreme industrial environments and mechanical stress.

• Excellent linearity: Provides stable and proportional signal output over the entire operating range.

• Compact and lightweight: Ideal for installations where space and mass are limited.

• High electromagnetic immunity: Resistant to interference from nearby motors or power cables.

• Easy mounting: Can be installed using a threaded stud or magnetic base for flexible applications.

• Compliant with international standards: Meets ISO 10816 and API 670 vibration measurement guidelines.

• Proven design: Backed by decades of Epro’s field experience in industrial vibration monitoring.

---

FAQ

1. What principle does the PR9266/12 sensor operate on?
   It works on the electrodynamic moving-coil principle, where mechanical vibration induces a voltage proportional to the vibration velocity.

2. What is the sensor’s output signal type?
   The sensor provides a self-generated voltage signal directly proportional to vibration velocity, with no external power required.

3. Can the PR9266/12 be used with Epro monitoring systems?
   Yes, it is fully compatible with Epro MMS systems such as MMS6000 and MMS3120, as well as other standard vibration monitoring systems.

4. What is the frequency range of this sensor?
   The PR9266/12 offers a wide frequency response from 10 Hz to 1,000 Hz, suitable for most industrial machinery.

5. What type of mounting is recommended for accurate measurement?
   A rigid threaded mounting or magnetic base should be used to ensure optimal mechanical coupling and signal accuracy.

6. Does the sensor measure absolute or relative vibration?
   The PR9266/12 measures absolute vibration velocity on non-rotating parts such as bearing housings or casings.

7. What materials are used for the sensor housing?
   It is constructed from stainless steel for superior mechanical strength and corrosion resistance.

8. What internal resistance does the coil exhibit?
   The internal resistance is 340 ohms, enabling compatibility with standard monitoring input impedances.

9. Is recalibration of the PR9266/12possible?
   Yes, recalibration can be performed using standard vibration calibration systems to verify sensitivity accuracy.

10. Can this sensor be installed in high-temperature environments?
    Yes, the PR9266/12operates effectively within -25°C to +100°C, with consistent sensitivity over the temperature range.

---

Related Models (Same Series)

---

Popular EPRO Models

FAQ

1. What principle does the PR9266/12 sensor operate on?
   It works on the electrodynamic moving-coil principle, where mechanical vibration induces a voltage proportional to the vibration velocity.

2. What is the sensor’s output signal type?
   The sensor provides a self-generated voltage signal directly proportional to vibration velocity, with no external power required.

3. Can the PR9266/12 be used with Epro monitoring systems?
   Yes, it is fully compatible with Epro MMS systems such as MMS6000 and MMS3120, as well as other standard vibration monitoring systems.

4. What is the frequency range of this sensor?
   The PR9266/12 offers a wide frequency response from 10 Hz to 1,000 Hz, suitable for most industrial machinery.

5. What type of mounting is recommended for accurate measurement?
   A rigid threaded mounting or magnetic base should be used to ensure optimal mechanical coupling and signal accuracy.

6. Does the sensor measure absolute or relative vibration?
   The PR9266/12 measures absolute vibration velocity on non-rotating parts such as bearing housings or casings.

7. What materials are used for the sensor housing?
   It is constructed from stainless steel for superior mechanical strength and corrosion resistance.

8. What internal resistance does the coil exhibit?
   The internal resistance is 340 ohms, enabling compatibility with standard monitoring input impedances.

9. Is recalibration of the PR9266/12possible?
   Yes, recalibration can be performed using standard vibration calibration systems to verify sensitivity accuracy.

10. Can this sensor be installed in high-temperature environments?
    Yes, the PR9266/12operates effectively within -25°C to +100°C, with consistent sensitivity over the temperature range.

Related Models (Same Series)

---

Popular EPRO Models

Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express. We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.

As for the delivery time, when we receive your order requirements, we will arrange for warehouse personnel to test and verify the products. After you place the order, we will send it to you within 24 hours.