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- PR6423/011-010
- 8mm Eddy Current Sensor
- Germany
- 8 mm
- 0.1 kg
- Xiamen, China
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Product Overview
The Epro PR6423/011-010 8mm Eddy Current Sensor is a non-contact displacement sensor used for monitoring the position and movement of conductive machine components. It belongs to the PR6423 Series and is commonly applied to rotating machinery where direct mechanical contact with the monitored shaft is undesirable.
The sensor operates by establishing an electromagnetic field at the probe tip and detecting changes caused by the proximity of a conductive target. This makes it suitable for measuring shaft displacement, vibration-related movement, eccentricity, and other dynamic mechanical conditions.
In a typical machinery monitoring installation, the PR6423/011-010 is connected to compatible signal-conditioning electronics. The conditioned measurement signal can then be sent to a machinery monitoring or protection system for continuous observation, alarm generation, and equipment protection.
For maintenance teams, the sensor is normally checked together with its signal-conditioning unit, connecting cable, mounting arrangement, and monitored shaft. Correct sensor matching and installation conditions are important when replacing an existing probe.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Eddy Current Sensor |
| Product Series | PR6423 Series |
| Model | PR6423/011-010 |
| Sensor Type | 8mm Eddy Current Sensor |
| Measurement Method | Non-Contacting Eddy Current Measurement |
| Target Type | Conductive Machine Target |
| Application | Rotating Machinery Monitoring |
| Sensor Head Diameter | 8 mm |
| Weight | 0.1 kg |
Product Features
- 8 mm eddy current sensing technology for non-contact measurement
- Detects dynamic and static movement of conductive machine targets
- Suitable for shaft displacement and position monitoring
- Can be used for vibration-related measurements on rotating machinery
- Works with compatible Epro signal-conditioning electronics
- Applicable to machinery protection and condition monitoring systems
- Useful for continuous monitoring of critical rotating equipment
- Suitable for replacement of compatible PR6423 Series sensing elements
Working Principle
The PR6423/011-010 uses the eddy-current principle to determine the distance between the probe tip and a conductive target such as a rotating shaft.
Conductive Machine Target → PR6423/011-010 → Signal Conditioning Electronics → Machinery Monitoring System
The probe generates an electromagnetic field around its sensing tip. When a conductive target enters this field, eddy currents are induced in the target. The resulting change in the electromagnetic field varies with the distance between the probe and the target.
The downstream signal-conditioning electronics converts the sensor response into a usable electrical measurement signal. The machinery monitoring system can then use this signal for shaft position, displacement, vibration, eccentricity, or related protection functions.
Typical signal applications include:
- Shaft radial displacement
- Shaft axial position
- Rotor eccentricity
- Shaft vibration measurement
- Rotational position monitoring
- Machinery protection inputs
Role in a Rotating Machinery Monitoring Architecture
The sensor acts as the physical measurement point between the machine shaft and the monitoring electronics.
Rotating Shaft → PR6423/011-010 → Signal Conditioner → Machinery Monitor → Alarm / Protection System
| System Element | Function |
|---|---|
| Rotating Shaft | Provides the conductive measurement target |
| PR6423/011-010 | Detects the target-to-probe relationship without physical contact |
| Signal Conditioner | Excites the probe and conditions the measurement signal |
| Machinery Monitor | Processes and displays the measurement |
| Alarm System | Generates warning or trip conditions |
| Protection System | Initiates protective action when configured limits are exceeded |
Industrial Applications
| Application | Typical Use |
|---|---|
| Steam Turbines | Shaft vibration and displacement monitoring |
| Gas Turbines | Rotor movement and machinery protection |
| Turbo Compressors | Shaft position and vibration measurement |
| Centrifugal Compressors | Rotor condition monitoring |
| Pumps | Shaft displacement and mechanical condition monitoring |
| Generators | Rotor movement and vibration monitoring |
| Electric Motors | Shaft position and vibration-related measurements |
| Industrial Fans | Rotating shaft monitoring |
| Process Machinery | Continuous mechanical condition monitoring |
Installation and Maintenance
- Verify that the PR6423/011-010 is the correct sensor variant for the existing monitoring system.
- Confirm compatibility with the associated signal-conditioning electronics before installation.
- Check that the monitored shaft or target material is suitable for eddy-current measurement.
- Install the probe with the required orientation toward the measurement target.
- Set and verify the probe-to-target gap according to the applicable measurement system requirements.
- Ensure that the probe mounting arrangement is mechanically secure.
- Route the sensor cable away from strong electrical interference where practical.
- Inspect connectors for contamination, looseness, corrosion, or mechanical damage.
- Check the complete sensor-to-monitor signal path rather than testing the probe in isolation.
- Verify the monitoring system response after installation and compare the measured value with the expected machine condition.
- During scheduled maintenance, inspect the probe tip and mounting hardware for damage or contamination.
- If the signal becomes unstable, check the sensor, cable, signal conditioner, target condition, alignment, and monitoring electronics as a complete chain.
A missing or unstable measurement signal does not necessarily indicate a failed probe. Cable problems, incorrect probe matching, unsuitable gap, poor mounting, signal-conditioning faults, and problems at the monitoring input can produce similar symptoms.
Related Components
| Component | Function |
|---|---|
| Epro PR6423 Series Probe | Eddy-current sensing element |
| Compatible Signal Conditioner | Provides probe excitation and signal conditioning |
| Sensor Cable | Carries the probe signal to the conditioning electronics |
| Machinery Monitor | Receives and processes the conditioned signal |
| Vibration Monitoring System | Performs continuous machinery condition monitoring |
| Probe Mounting Hardware | Maintains the required sensor position |
| Machine Shaft / Rotor | Conductive target for measurement |
| Machinery Protection System | Provides alarm and trip functions |
| Monitoring Cabinet | Houses associated monitoring electronics |
| Grounding System | Helps maintain signal integrity and installation stability |
Recommended Related Models
| Model / Series | Product Type | Typical Application |
|---|---|---|
| PR6423/011-010 | 8 mm Eddy Current Sensor | Shaft displacement and vibration monitoring |
| PR6423 Series | Eddy Current Sensor Series | General rotating machinery measurement |
| PR6423/010 Series | 8 mm Eddy Current Sensor | Machinery displacement and position monitoring |
| PR6422 Series | Eddy Current Sensor | Rotating machinery monitoring |
| PR6424 Series | Eddy Current Sensor | Shaft measurement applications |
| PR6425 Series | Eddy Current Sensor | Machinery displacement monitoring |
| PR6426 Series | Eddy Current Sensor | Critical machinery measurement |
| CON011 | Eddy Current Signal Converter | Signal conditioning for compatible PR642x sensors |
| CON031 | Eddy Current Signal Converter | Signal conditioning and machinery monitoring |
Key Advantages
- Non-contact measurement avoids mechanical contact with the rotating shaft.
- 8 mm sensing technology suits a wide range of rotating machinery applications.
- Suitable for both static position and dynamic movement monitoring.
- Integrates with compatible Epro signal-conditioning electronics.
- Supports machinery condition monitoring and protection functions.
- Useful for turbine, compressor, pump, motor, and generator applications.
- Practical for replacement and maintenance of existing PR6423 Series installations.
Technical FAQs
What does the Epro PR6423/011-010 measure?
It detects changes in the distance between the sensor tip and a conductive machine target. Depending on the monitoring configuration, the resulting signal can be used for shaft displacement, position, eccentricity, or vibration-related measurements.
Can the PR6423/011-010 operate as a complete monitoring system by itself?
No. The probe is the sensing element rather than a complete monitoring instrument. It normally works with compatible signal-conditioning electronics and a machinery monitoring or protection system.
Why is the probe installed without touching the rotating shaft?
Eddy-current sensing detects the conductive target through an electromagnetic field. Non-contact operation avoids mechanical wear on the sensor and allows measurements to be taken from a rotating shaft while the machine is operating.
What should be checked when the monitoring signal from the sensor is abnormal?
Check the probe-to-target gap, probe alignment, sensor mounting, cable connections, signal-conditioning electronics, target surface, and monitoring input. Testing the entire measurement chain is generally more effective than replacing the probe immediately.