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- PR6423/014-040
- 8mm Eddy Current Sensor
- Germany
- 8 mm
- 0.1 kg
- Xiamen, China
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Product Overview
The Epro PR6423/014-040 is an 8 mm eddy current sensor used for non-contact measurement of shaft displacement and relative movement in rotating machinery. It belongs to the PR6423 series and is commonly applied where continuous monitoring of rotating equipment is required.
The sensor operates close to a conductive machine target without physical contact. This makes it suitable for monitoring shaft position, radial movement, axial displacement, and vibration-related motion on machinery such as turbines, compressors, pumps, and generators.
In a typical monitoring installation, the sensor is positioned toward the monitored shaft or target surface and connected to compatible signal-conditioning electronics. Changes in the distance between the sensor and target are converted into an electrical signal that can be processed by the machinery monitoring system.
The PR6423/014-040 is used as the sensing element within the measurement chain. Correct probe mounting, target alignment, installation gap, and compatibility with the associated signal converter are important factors when commissioning or replacing the sensor.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Epro |
| Model | PR6423/014-040 |
| Product Family | PR6423 Series |
| Product Type | 8mm Eddy Current Sensor |
| Primary Function | Non-contact shaft displacement measurement |
| Sensing Principle | Eddy Current |
| System Role | Rotating machinery displacement and vibration sensor |
| Typical Application | Turbine, compressor, pump, and generator monitoring |
| Sensor Head Diameter | 8 mm |
| Weight | 0.1 kg |
Product Features
- 8 mm eddy current sensor for rotating machinery monitoring
- Non-contact measurement of conductive targets
- Suitable for shaft displacement and vibration-related measurements
- Part of the Epro PR6423 sensor family
- Suitable for continuous machinery monitoring systems
- Can be connected to compatible eddy current signal-conditioning equipment
- Useful for radial and axial shaft movement monitoring
- Suitable for turbine, compressor, pump, and generator applications
- Supports machinery protection and condition monitoring architectures
Working Principle
The PR6423/014-040 uses an eddy current sensing principle to detect changes in the distance between the sensor head and a conductive target. When the monitored shaft moves relative to the sensor, the electromagnetic interaction at the sensing tip changes.
The associated signal-conditioning electronics convert the sensor response into a usable electrical measurement. The resulting signal can then be evaluated by a machinery monitoring system for shaft position, displacement, or vibration-related conditions.
Conductive Shaft / Target → PR6423/014-040 Sensor → Eddy Current Signal Converter → Machinery Monitoring System → Alarm / Protection
The sensor itself is the measurement point and does not independently determine machine alarms or shutdown actions. Probe position, target material, installation gap, mechanical stability, and the compatible signal converter all influence the quality of the resulting measurement.
Role in an Eddy Current Machinery Monitoring Architecture
The PR6423/014-040 occupies the field sensing layer of an eddy current monitoring system. It provides the non-contact measurement needed by downstream signal-conditioning and machinery protection equipment.
Rotating Shaft → PR6423/014-040 → Signal Converter → Monitoring Module → Alarm / Trip → Machine Protection
| System Element | Function |
|---|---|
| Rotating Shaft | Provides the conductive target being monitored |
| PR6423/014-040 | Detects relative shaft-to-sensor displacement |
| Eddy Current Signal Converter | Conditions the sensor response into a usable signal |
| Machinery Monitoring Module | Evaluates displacement or vibration information |
| Alarm System | Indicates abnormal machinery conditions |
| Protection Logic | Determines whether a configured protective response is required |
| Shutdown / Trip System | Initiates machine protection when required |
The sensor therefore forms the first measurement stage of the monitoring chain, while the converter and monitoring equipment perform signal processing, evaluation, and protection functions.
Industrial Applications
| Application | Typical Use |
|---|---|
| Steam Turbines | Shaft displacement and vibration monitoring |
| Gas Turbines | Rotor movement and machinery protection |
| Compressors | Radial shaft movement monitoring |
| Pumps | Shaft vibration and displacement measurement |
| Generators | Rotor position and movement monitoring |
| Motors | Non-contact shaft condition monitoring |
| Expanders | High-speed rotating machinery monitoring |
| Industrial Turbomachinery | Continuous shaft monitoring |
| Process Plants | Critical rotating equipment protection |
| Power Generation | Turbine and generator monitoring |
Installation and Maintenance
- Verify the complete PR6423/014-040 model designation before installation.
- Confirm compatibility with the installed eddy current signal-conditioning system.
- Isolate the monitored machinery and follow the applicable maintenance safety procedure.
- Inspect the sensor head for physical damage, contamination, or abnormal wear.
- Check the mounting arrangement and ensure that the sensor can be positioned correctly relative to the target.
- Set the sensor-to-target gap according to the requirements of the associated measurement system.
- Maintain proper alignment between the sensor head and the monitored shaft or target.
- Check sensor wiring and connections for mechanical damage or poor termination.
- Verify that the signal converter and monitoring equipment are correctly connected.
- Check the sensor output during commissioning and confirm that the measurement is stable.
- Investigate sudden changes in sensor output by checking the probe position, target condition, wiring, and signal-conditioning equipment.
- After replacement, verify the complete measurement chain and confirm correct monitoring operation before returning the machinery to service.
Compatible System Components
| Component | Function |
|---|---|
| Epro Eddy Current Signal Converter | Conditions the PR6423 sensor signal |
| Epro PR6423 Series Sensors | Provides non-contact displacement measurement |
| Machinery Monitoring Module | Processes shaft displacement and vibration information |
| Probe Mounting Hardware | Positions the sensor relative to the monitored target |
| Extension Cable | Connects the sensor to associated signal-conditioning equipment |
| Rotating Shaft / Rotor | Provides the conductive measurement target |
| Alarm System | Indicates abnormal machinery operating conditions |
| Machine Protection System | Initiates configured protective actions |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Epro PR6423/014-010 | 8mm Eddy Current Sensor | Shaft displacement monitoring |
| Epro PR6423/014-030 | 8mm Eddy Current Sensor | Rotating machinery monitoring |
| Epro PR6423/014-040 | 8mm Eddy Current Sensor | Shaft movement measurement |
| Epro PR6423 Series | Eddy Current Sensor Family | Machinery displacement monitoring |
| Epro PR6423 + CON021 | Sensor + Signal Converter | Complete eddy current measurement chain |
| Epro PR6423 + CON031 | Sensor + Signal Converter | Machinery monitoring applications |
| Epro Eddy Current Signal Converters | Signal Conditioning Equipment | Sensor signal processing |
| Epro Machinery Protection Systems | Machinery Monitoring System | Rotating equipment protection |
Key Advantages
- Provides non-contact measurement of rotating shaft movement.
- Uses an eddy current sensing principle suitable for conductive machinery targets.
- Suitable for continuous displacement and vibration monitoring.
- Fits into established PR6423 eddy current measurement architectures.
- Can be integrated with compatible signal-conditioning and machinery protection equipment.
- Suitable for critical rotating equipment in power-generation and industrial plants.
Technical FAQs
What is the PR6423/014-040 primarily used to measure?
The sensor is primarily used to detect relative movement between the sensor head and a conductive machine target. Depending on the monitoring arrangement, this information can be used for shaft displacement, position, or vibration-related measurements.
Does the PR6423/014-040 require a signal converter?
The sensor normally forms part of a complete eddy current measurement system and is used with compatible signal-conditioning electronics. The converter processes the sensor response so that it can be evaluated by the downstream monitoring system.
What installation conditions can affect the sensor signal?
Probe-to-target gap, sensor alignment, mounting stability, target surface condition, cable connections, and signal-conditioning equipment can all influence the measurement. Mechanical installation should therefore be checked when the signal becomes unstable or differs from expected operating behavior.
How should the PR6423/014-040 be selected as a replacement sensor?
The complete model designation should be matched with the existing installation, including the sensor configuration, mounting arrangement, cable/interface requirements, and associated signal-conditioning equipment. The replacement should then be verified through the complete monitoring chain during commissioning.