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- PR6423/010-120-CN
- 8mm Eddy Current Sensor
- Germany
- 8 mm
- 0.1 kg
- Xiamen, China
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Product Overview
The Epro PR6423/010-120-CN is an 8 mm eddy current sensor used for non-contact measurement of shaft movement and relative displacement in rotating machinery. It is suited to monitoring applications where the sensor must detect mechanical movement without physically contacting the rotating component.
The sensor can be installed near a rotating shaft to monitor radial movement, shaft position, or vibration-related displacement. Typical equipment includes steam turbines, gas turbines, compressors, pumps, generators, and other machines where shaft condition is continuously monitored.
Eddy current sensing is particularly useful in machinery protection because the measurement is taken directly between the probe and the conductive target. The sensor can therefore monitor changes in shaft position while avoiding mechanical wear associated with contact-type sensing elements.
In an installed monitoring system, the PR6423/010-120-CN works with the associated driver or signal conditioning electronics and a machinery monitoring system. Probe installation, target material, cable condition, and the sensor-to-shaft relationship all affect measurement stability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | PR6423/010-120-CN |
| Product Family | Epro |
| Product Type | Eddy Current Sensor |
| Sensor Type | 8 mm Eddy Current Sensor |
| Primary Function | Non-contact displacement and rotating machinery measurement |
| System Role | Rotating machinery measurement sensor |
| Sensor Technology | Eddy Current |
| Typical Application | Shaft displacement, vibration monitoring, rotating machinery condition monitoring |
| Sensor Head Diameter | 8 mm |
| Weight | 0.1 kg |
Product Features
- 8 mm eddy current sensor for non-contact rotating machinery measurement.
- Measures relative movement between the sensor and conductive target.
- Suitable for shaft displacement and vibration-related measurement applications.
- No physical contact with the rotating shaft during normal operation.
- Suitable for continuous machinery monitoring systems.
- Applicable to turbines, compressors, pumps, generators, and other rotating equipment.
- Supports machinery protection and condition monitoring applications.
- Compact probe configuration for installation close to rotating machine components.
- Works with associated eddy current driver and signal conditioning equipment.
- Suitable for applications requiring direct monitoring of shaft movement.
Working Principle
The PR6423/010-120-CN uses eddy current sensing to detect changes in the distance between the probe and a conductive rotating target. The probe generates an electromagnetic field toward the shaft. When the shaft moves relative to the probe, the electrical response of the sensing circuit changes.
The associated driver or signal conditioning electronics converts the sensor response into a usable measurement signal. A machinery monitoring system can then process the signal for displacement, vibration, alarm, or protection functions.
Rotating Shaft → PR6423/010-120-CN Sensor → Eddy Current Driver / Signal Conditioning → Machinery Monitoring System → Alarm / Protection
For accurate measurements, the probe position must remain mechanically stable. Changes in probe mounting, cable condition, or the sensor-to-target relationship can affect the observed signal and should be considered when troubleshooting abnormal readings.
Role in a Rotating Machinery Monitoring Architecture
The PR6423/010-120-CN functions as the field sensing element in an eddy current measurement chain. It detects shaft movement at the machine and sends the sensing information to the associated electronics for conditioning and monitoring.
Rotating Machine → PR6423/010-120-CN → Signal Conditioning → Monitoring Module → Protection / Control System
| System Element | Function |
|---|---|
| Rotating Shaft | Conductive target being monitored |
| PR6423/010-120-CN | Detects relative shaft movement |
| Eddy Current Driver | Interfaces with the eddy current sensor |
| Signal Conditioning | Converts the sensor response into a usable measurement |
| Machinery Monitoring Module | Processes and evaluates the measurement |
| Protection System | Handles configured alarm or protective functions |
| Operator Interface | Displays measurement and machinery status |
Industrial Applications
| Application | Typical Use |
|---|---|
| Steam Turbines | Shaft displacement and vibration monitoring |
| Gas Turbines | Rotating shaft condition monitoring |
| Compressors | Shaft movement and machinery protection |
| Pumps | Condition monitoring and vibration measurement |
| Generators | Shaft movement monitoring |
| Motors | Non-contact rotating shaft measurement |
| Rotating Machinery | Relative displacement monitoring |
| Machinery Protection | Input for alarm and protection functions |
| Condition Monitoring | Continuous monitoring of mechanical behavior |
Installation and Maintenance
- Install the sensor in a mechanically stable mounting position near the monitored shaft.
- Maintain the required probe-to-target relationship during installation.
- Ensure the probe does not contact the rotating shaft during operation.
- Secure the probe against movement caused by machine vibration.
- Route the sensor cable carefully to avoid mechanical damage.
- Keep sensor wiring away from sources of excessive electrical interference where practical.
- Inspect connectors and cable terminations before commissioning.
- Verify the sensor connection to the associated eddy current driver.
- Confirm that the monitoring system receives a stable signal after installation.
- Compare sensor readings with normal machine operating conditions during commissioning.
- Inspect the probe mounting and cable condition during scheduled maintenance.
- When replacing the sensor, verify the model, probe position, associated electronics, wiring, and monitoring configuration before returning the machine to service.
Related Components
| Component | Function |
|---|---|
| Epro PR6423 Series | Eddy current sensor family |
| Eddy Current Driver | Provides the sensor interface and signal processing |
| Extension Cable | Connects the sensor with associated electronics where required |
| Signal Conditioning Equipment | Converts and conditions the sensor signal |
| Machinery Monitoring Module | Processes displacement or vibration signals |
| Machinery Protection System | Provides monitoring, alarm, and protection functions |
| Vibration Monitoring System | Evaluates rotating equipment condition |
| Rotating Shaft | Conductive measurement target |
| Monitoring Panel | Displays machine condition and alarm information |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| PR6423/010-120-CN | 8 mm Eddy Current Sensor | Shaft displacement and vibration monitoring |
| PR6423/010-111+CON031 | Eddy Current Sensor + Signal Converter | Non-contact machinery measurement |
| Epro PR6423 Series | Eddy Current Sensors | Rotating machinery monitoring |
| Epro 8 mm Eddy Current Sensors | Eddy Current Sensors | Shaft movement measurement |
| Epro Eddy Current Drivers | Signal Interface Equipment | Eddy current sensor signal processing |
| Epro Signal Converters | Signal Conditioning Equipment | Sensor signal interface |
| Epro Machinery Monitoring Components | Monitoring Components | Machinery condition monitoring |
| Epro Vibration Monitoring Components | Monitoring Equipment | Machinery protection applications |
Key Advantages
- Non-contact measurement of rotating shaft movement.
- 8 mm sensor configuration for machinery monitoring applications.
- Suitable for shaft displacement and vibration-related measurements.
- No mechanical contact with the rotating target during normal operation.
- Compatible with eddy current measurement chains using associated driver electronics.
- Suitable for turbines, compressors, pumps, generators, and other rotating equipment.
Technical FAQs
What type of machinery can use the PR6423/010-120-CN?
The sensor is suitable for rotating machinery where non-contact shaft movement measurement is required. Common applications include turbines, compressors, pumps, generators, and other critical rotating equipment.
Why is the probe-to-shaft relationship important during installation?
The sensor measures the relative condition between the probe and conductive target. Mechanical movement of the probe, incorrect positioning, or an unstable mounting arrangement can therefore introduce measurement changes that are unrelated to the actual shaft condition.
What should be checked when the sensor signal suddenly changes?
Check the probe mounting, sensor cable, connectors, associated driver, and monitoring-system input first. If the electrical installation is normal, compare the signal with actual machine operating conditions to determine whether the change corresponds to genuine shaft movement or vibration.
Can the PR6423/010-120-CN connect directly to a PLC analog input?
The sensor should normally be used with its appropriate eddy current driver or signal conditioning electronics rather than being treated as a conventional standalone analog transmitter. The complete sensor, driver, and monitoring-system interface should be checked before connecting it to a control or monitoring input.