Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | EPRO / Emerson |
| Model | PR9268/300-000 |
| Product Type | Electrodynamic Velocity Sensor |
| Measurement Target | Absolute casing/bearing housing vibration |
| Sensor Principle | Electrodynamic velocity measurement |
| Orientation | Horizontal mounting, ±30° version |
| Sensitivity | 28.5 mV/mm/s ±5% |
| Frequency Range | 4 to 1000 Hz |
| Natural Frequency | Approx. 4.5 Hz |
| Vibration Amplitude | Up to 3000 µm peak-to-peak mechanical limit |
| Amplitude Linearity | <2% |
| Maximum Continuous Acceleration | 10 g |
| Maximum Intermittent Acceleration | 20 g |
| Operating Temperature | Approximately -20°C to +100°C |
| Protection Class | IP55 housing protection |
| Cable / Connector | Industrial vibration sensor connection |
| Typical Application | Turbine, compressor, pump, fan vibration monitoring |
Product Introduction
EPRO PR9268/300-000 Overview
The EPRO PR9268/300-000 is an electrodynamic velocity sensor designed for measuring absolute vibration levels on rotating machinery. It converts mechanical vibration velocity into an electrical signal that can be analyzed by machinery protection and condition monitoring systems. The sensor is commonly applied to large rotating assets where early detection of mechanical issues is important for equipment protection.
The Emerson EPRO PR9268/300-000 belongs to the PR9268 vibration sensor family, which is widely used in turbine, compressor, pump, and fan monitoring applications. The sensor measures casing vibration rather than shaft displacement, making it suitable for monitoring bearing housings and machine structures where overall mechanical vibration trends need to be evaluated.
The EPRO PR9268/300-000 provides a velocity output with a sensitivity of approximately 28.5 mV/mm/s and operates across a frequency range suitable for industrial rotating equipment analysis. It is commonly integrated with EPRO/Emerson machinery monitoring systems used in power generation and process industries. Replacement requires checking mounting orientation, sensor sensitivity, cable arrangement, monitoring channel configuration, and system calibration parameters.
PR9268300-000
Application Scenarios & Field Pitfalls (The Engineer’s Perspective)
Engineering Pain Point
A turbine or compressor monitoring system reports increasing vibration levels, unstable readings, or channel faults. The first assumption may be sensor failure, but the complete measurement chain must be checked.
The troubleshooting path should include:
- Sensor mounting condition
- Cable insulation and shielding
- Monitoring module input configuration
- Sensor sensitivity setting
- Mechanical vibration source
- Bearing and machine condition
The EPRO /300-000 is a measurement component within the vibration protection system. Incorrect configuration or installation can produce misleading vibration values.
Typical Applications
Steam and Gas Turbine Monitoring
Used for:
- Bearing housing vibration measurement
- Turbine casing vibration monitoring
- Mechanical fault detection
Compressor Protection Systems
Applied for:
- Rotor-related vibration monitoring
- Bearing condition assessment
- Maintenance planning support
Pumps and Fans
Used for:
- Motor-driven equipment monitoring
- Imbalance detection
- Mechanical degradation analysis
Industrial Machinery Protection
Applied in:
- Refining plants
- Chemical facilities
- Power stations
- Process industries
Technical Pitfalls to Avoid
1. Verify Sensor Orientation
The family includes different orientation versions. Confirm:
- Horizontal or vertical mounting requirement
- Measurement direction
- Existing sensor model suffix
Installing the wrong orientation version may affect measurement accuracy.
2. Confirm Monitoring Channel Configuration
Before replacement, verify:
- Input sensitivity setting
- Engineering units
- Alarm thresholds
- Channel scaling
A replacement sensor with incorrect configuration can create false vibration alarms.
3. Inspect Mechanical Installation
Common causes of abnormal readings:
- Loose mounting hardware
- Incorrect mounting surface
- Excessive mechanical resonance
- Damaged sensor cable
4. Review Complete Protection System
The sensor works together with:
- EPRO MMS/AMS monitoring modules
- Signal conditioning hardware
- Control room monitoring software
A sensor fault should be evaluated as part of the complete vibration monitoring loop.
Related Products
- EPRO Series
Electrodynamic velocity sensors for absolute vibration measurement. - EPRO PR6423 Series
Eddy current displacement sensors for shaft vibration and position measurement. - EPRO PR6426 Series
Eddy current sensor systems for critical rotating machinery monitoring. - EPRO MMS6000 System
Machinery monitoring platform used with EPRO vibration sensors. - Emerson AMS 6500 Machinery Health Monitor
Machinery protection and predictive maintenance monitoring system. - EPRO CON021 / CON041
Sensor signal converters and interfaces used with EPRO proximity measurement systems.
